High Slew Rate Adaptive Biasing Hybrid Envelope Tracking Supply Modulator For Lte Applications

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High Slew-rate Adaptive Biasing Hybrid Envelope Tracking Supply Modulator for LTE Applications

Author : Yue Jing
Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (124 download)

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Book Synopsis High Slew-rate Adaptive Biasing Hybrid Envelope Tracking Supply Modulator for LTE Applications by : Yue Jing

Download or read book High Slew-rate Adaptive Biasing Hybrid Envelope Tracking Supply Modulator for LTE Applications written by Yue Jing and published by . This book was released on 2017 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: As wireless communication enters smartphone era, more complicated communication technologies are being used to transmit higher data rate. Power amplifier (PA) has to work in back-off region, while this inevitably reduces battery life for cellphones. Various techniques have been reported to increase PA efficiency, such as envelope elimination and restoration (EER) and envelope tracking (ET). However, state of the art ET supply modulators failed to address high efficiency, high slew rate, and accurate tracking concurrently. In this dissertation, a linear-switch mode hybrid ET supply modulator utilizing adaptive biasing and gain enhanced current mirror operational transconductance amplifier (OTA) with class-AB output stage in parallel with a switching regulator is presented. In comparison to a conventional OTA design with similar quiescent current consumption, proposed approach improves positive and negative slew rate from 50 V/μs to 93.4 V/μs and -87 V/μs to -152.5 V/μs respectively, dc gain from 45 dB to 67 dB while consuming same amount of quiescent current. The proposed hybrid supply modulator achieves 83% peak efficiency, power added efficiency (PAE) of 42.3% at 26.2 dBm for a 10 MHz 7.24 dB peak-to-average power ratio (PAPR) LTE signal and improves PAE by 8% at 6 dB back off from 26.2 dBm power amplifier (PA) output power with respect to fixed supply. With a 10 MHz 7.24 dB PAPR QPSK LTE signal the ET PA system achieves adjacent channel leakage ratio (ACLR) of -37.7 dBc and error vector magnitude (EVM) of 4.5% at 26.2 dBm PA output power, while with a 10 MHz 8.15 dB PAPR 64QAM LTE signal the ET PA system achieves ACLR of -35.6 dBc and EVM of 6% at 26 dBm PA output power without digital pre-distortion (DPD). The proposed supply modulator core circuit occupies 1.1 mm2 die area, and is fabricated in a 0.18 μm CMOS technology.

Hybrid Envelope Tracking Supply Modulator Analysis and Design for Wideband Applications

Author : Parisa Mahmoudidaryan
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Hybrid Envelope Tracking Supply Modulator Analysis and Design for Wideband Applications by : Parisa Mahmoudidaryan

Download or read book Hybrid Envelope Tracking Supply Modulator Analysis and Design for Wideband Applications written by Parisa Mahmoudidaryan and published by . This book was released on 2019 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wideband hybrid envelope tracking modulator utilizing a hysteretic-controlled three-level switching converter and a slew-rate enhanced linear amplifierer is presented. In addition to smaller ripple and lower losses of three-level switching converters, employing the proposed hysteresis control loop results in a higher speed loop and wider bandwidth converter, enabling over 80MHz of switching frequency. A concurrent sensor circuit monitors and regulates the flying capacitor voltage VCF and eliminates conventional required calibration loop to control it. The hysteretic-controlled three-level switching converter provides a high percentage of power amplifier supply load current with lower ripple, reducing the linear amplifier high-frequency current and ripple cancellation current, improving the overall system efficiency. A slew-rate enhancement (SRE) circuit is employed in the linear amplifier resulting in slew-rate of

Design of the Envelope Tracking Hybrid Supply Modulator for Power Amplifier in LTE-20MHz Wireless Communication Applications

Author : 鄧厚威
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)

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Book Synopsis Design of the Envelope Tracking Hybrid Supply Modulator for Power Amplifier in LTE-20MHz Wireless Communication Applications by : 鄧厚威

Download or read book Design of the Envelope Tracking Hybrid Supply Modulator for Power Amplifier in LTE-20MHz Wireless Communication Applications written by 鄧厚威 and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design of the Envelope Tracking Hybrid Supply Modulator for Lte-10mhz Application

Author : 陳彥廷
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Design of the Envelope Tracking Hybrid Supply Modulator for Lte-10mhz Application by : 陳彥廷

Download or read book Design of the Envelope Tracking Hybrid Supply Modulator for Lte-10mhz Application written by 陳彥廷 and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Hybrid Supply Modulator Achieving 100MHz Envelope Tracking Bandwidth for 5G Power Amplifier

Author : 熊珮妤
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis Hybrid Supply Modulator Achieving 100MHz Envelope Tracking Bandwidth for 5G Power Amplifier by : 熊珮妤

Download or read book Hybrid Supply Modulator Achieving 100MHz Envelope Tracking Bandwidth for 5G Power Amplifier written by 熊珮妤 and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Envelope Tracking Supply Modulator with Trellis Search-Based Switching and 160 MHz Capability

Author : Weiyu Leng
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (122 download)

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Book Synopsis Envelope Tracking Supply Modulator with Trellis Search-Based Switching and 160 MHz Capability by : Weiyu Leng

Download or read book Envelope Tracking Supply Modulator with Trellis Search-Based Switching and 160 MHz Capability written by Weiyu Leng and published by . This book was released on 2020 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Envelope tracking is widely used to raise the efficiency of PAs. An envelope tracking supply modulator (ETSM) modulates PA's supply voltage to tracks the RF waveform's envelope, so that the PA will operate in saturation all the time. A hybrid amplifier is commonly used to realize the ETSM, which, in effect, partitions the envelope bandwidth into a low and high subband. An efficient switching buck converter tracks the low band. In parallel with it, an op-amp supplies the current in the high band. In prior arts, the hybrid amplifier is realized with feedback using a hysteresis comparator, whose output actuates the buck converter to respond to the changing envelope; the continuous-time op-amp makes up for the error. But a comparator-driven buck converter produces a slew-rate limited current that always lags the envelope waveform. This forces the op-amp to produce a larger current to correct the error, and the arrangement cannot guarantee that the buck converter switches no often than is absolutely necessary. We replace the hysteresis comparator with a novel trellis-search that, first, finds the optimal sequence to switch the buck converter to minimize the RMS current that the op-amp must deliver; second, to lower the loss from switching the capacitance of FETs, it penalizes a large number of switching events in the buck converter. Meanwhile, with a conventional on-chip hysteresis comparator, we can demonstrate ETSM operation up to 160 MHz modulation bandwidth. This is the widest bandwidth reported so far for any ETSM.

High Efficiency Broadband Envelope-Tracking Power Amplifiers

Author : Jonmei Johana Yan
Publisher :
ISBN 13 : 9781303195266
Total Pages : 168 pages
Book Rating : 4.1/5 (952 download)

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Book Synopsis High Efficiency Broadband Envelope-Tracking Power Amplifiers by : Jonmei Johana Yan

Download or read book High Efficiency Broadband Envelope-Tracking Power Amplifiers written by Jonmei Johana Yan and published by . This book was released on 2013 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to meet the increasing demand for higher data rates while maximizing spectral efficiency, modern wireless communication systems transmit complex non-constant envelope modulation signals with high peak-to-average ratio (PAPR). As a result, conventional power amplifiers must be operated in back-off, leading to a significant efficiency reduction. Various power amplifier architectures (i.e. Doherty, outphasing, and envelope tracking) have been demonstrated to achieve high efficiency for these high PAPR signals. Unlike the other architectures, the envelope tracking power amplifier (ETPA) makes an excellent candidate for multi-band multi-frequency use, while maintaining high efficiency for high PAPR and under average power back-off, as it is fundamentally immune to changes in the frequency of the carrier; it depends only on the envelope of the RF signal. This dissertation focuses on the design of envelope tracking power amplifiers for enabling broadband wireless communication systems. First, a test-bench for evaluating broadband ETPAs is described. A calibration routine, acting as a pre-equalizer, is used to achieve a flat linear response over the entire instantaneous bandwidth of the system, resulting in less than 1% EVM for a 40 MHz LTE signal. Performances of envelope tracking power amplifiers on this test-bench at various frequencies from UHF to millimeter-wave are evaluated, and record efficiencies are demonstrated. Next, this dissertation describes how in under practical usage, the power transmitted fluctuates as a function of the load demands over time. The long-term efficiency of the ETPA is evaluated using Monte-Carlo simulations based on a projected time-varying power profile. Compared to a Doherty PA with the same peak efficiency, the ETPA can provide more than 1.4x reduction in overall energy consumed. The ETPA thus provides significant opportunities for system energy savings under realistic operation. Thirdly, to accommodate the wide range of carrier frequencies required for numerous emerging wireless systems, a multi-octave RFPA based on a compact GaN stacked IC with RC feedback is designed, fabricated, and evaluated. Multi-octave ET operation was demonstrated from 500 to 1750 MHz with >25% efficiency. Compared to its constant drain voltage counterpart, >2x improvement in RFPA efficiency is observed in ET. Lastly, while the ETPA provides advantages such as broad carrier bandwidths and high efficiency under back-off operation, one of the main challenges in ETPA design lies in accommodating wide modulation bandwidths. Adaptive de-troughing, a digital signal processing approach for extending the modulation bandwidth capability of an existing dynamic power supply, is described and evaluated. Measurements demonstrated the ability to extend ET operation to 20 MHz LTE signals. In addition, ~5-6% modulator efficiency enhancement was measured when comparing "standard" to "adaptive" de-troughing supply waveforms.

High Efficiency Wideband Envelope Tracking Power Amplifier for Next-generation Wireless Communications

Author : Myoungbo Kwak
Publisher :
ISBN 13 : 9781124856230
Total Pages : 109 pages
Book Rating : 4.8/5 (562 download)

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Book Synopsis High Efficiency Wideband Envelope Tracking Power Amplifier for Next-generation Wireless Communications by : Myoungbo Kwak

Download or read book High Efficiency Wideband Envelope Tracking Power Amplifier for Next-generation Wireless Communications written by Myoungbo Kwak and published by . This book was released on 2011 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest generation of smart devices deployed in cellular networks has created explosive growth in network data traffic, and the increasing demand for broadband services with higher data rates, require higher peak to average power ratio (PAPR) with wider bandwidth. One of the challenges in the conventional power amplifiers (PAs) with fixed supply voltage, is the degraded efficiency and generated heats at a large back-off to meet tight linearity requirements. This dissertation presents high efficiency wideband envelope tracking power amplifiers for 2.1 GHz micro base-stations and 2.5 GHz wireless mobile applications. By superimposing the envelope signal at the drain such that the RF amplifier operates consistently closer to saturation, the overall efficiency is improved and the generated heat is reduced dramatically. In the first part of the dissertation, a high performance BiCMOS DMOS monolithic envelope amplifier for micro-base station power amplifiers is presented. Due to the low breakdown voltage of the CMOS transistors, the high voltage envelope amplifier has been implemented with discrete components with high voltage process. Compared to these discrete solutions, an integrated circuits implementation for the envelope amplifier brings many benefits. The design of monolithic envelope amplifiers for high voltage (VDD = 15 V) envelope tracking applications, and the design techniques to solve the reliability issues with thin gate oxide is described. The overall envelope tracking system employing a GaN-HEMT RF transistor, and fully integrated high voltage envelope amplifier with a 0.35[mu]m BiCMOS DMOS process, is demonstrated. In the second part, a high-efficiency wideband envelope tracking power amplifier for mobile LTE applications will be presented. The CMOS envelope amplifier with hybrid linear and switcher is designed in a 150 nm CMOS process. The envelope amplifier employs direct sensing of the linear stage current to reduce the propagation delay in the switcher. The strategy is demonstrated to improve the efficiency of the complete envelope tracking power amplifier system. The resulting performance of envelope tracking system employing a GaAs HBT-based RF PA with a 5 MHz LTE signal input demonstrated state-of-the-art efficiency while meet the linearity requirement.

Power Efficiency Enhancement of Transmitters Using Adaptive Envelope Tracking and Shaping Techniques for Small Payload Space Applications

Download Power Efficiency Enhancement of Transmitters Using Adaptive Envelope Tracking and Shaping Techniques for Small Payload Space Applications PDF Online Free

Author : Hafiz Faisal Rasool
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Power Efficiency Enhancement of Transmitters Using Adaptive Envelope Tracking and Shaping Techniques for Small Payload Space Applications by : Hafiz Faisal Rasool

Download or read book Power Efficiency Enhancement of Transmitters Using Adaptive Envelope Tracking and Shaping Techniques for Small Payload Space Applications written by Hafiz Faisal Rasool and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rise of modular system architecture for distributed satellite systems with multiple small payloads instead of conventional larger spacecrafts, the efficient characterization of power budget and available power constraints become even more vital. In order to establish high data rate downlink com munications in small satellite applications, use of highly efficient, non - conventional power amplification techniques is going to be a key factor in future communication systems. The concept of having small, less power consuming and high data rate transmis sion system extends to vast number of applications like light weight Unmanned Aerial Vehicle (UAV) and hand - held communication modules etc. The idea is to study and develop an adaptive envelope tracking technique which should be able to dynamically supply power to Radiofreq uency power amplifier. Consequently, a n optimal control over system power consumption leads to enhanced efficiency. The amplifiers intended for such systems exhibit nonlinear behavior when it comes to operating at maximum output power an d cause distortion in adjacent bands. Introducing a power supply modulation block in combination with digital linearization techniques such as DPD offers considerable improvement. Th is thesis tests a dynamic power supply adaptive shaping technique f or LTE signals. In comparison to conventional fixed supply RF PAs, Envelope Tracking PA has resulted in improved linearity at the output as well as reduced unwanted power leakage into adjacent frequency channels. By imposing an isogain trajectory trough th e shaping function, we can optimize the available power for high data rate communications while keeping the intermodulation distortion at acceptable levels by considering a tradeoff between efficiency and computational load.

High Bandwidth Supply Modulator Design for Envelope Tracking Application Using 0.15um GaN on SiC

Author : Samyak Parakh
Publisher :
ISBN 13 :
Total Pages : 63 pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis High Bandwidth Supply Modulator Design for Envelope Tracking Application Using 0.15um GaN on SiC by : Samyak Parakh

Download or read book High Bandwidth Supply Modulator Design for Envelope Tracking Application Using 0.15um GaN on SiC written by Samyak Parakh and published by . This book was released on 2018 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Envelope Tracking Hybrid Supply Modulator for 5G Wireless Systems

Author :
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (129 download)

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Book Synopsis Envelope Tracking Hybrid Supply Modulator for 5G Wireless Systems by :

Download or read book Envelope Tracking Hybrid Supply Modulator for 5G Wireless Systems written by and published by . This book was released on 2021 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Power Management Techniques for Integrated Circuit Design

Author : Ke-Horng Chen
Publisher : John Wiley & Sons
ISBN 13 : 1118896831
Total Pages : 774 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Power Management Techniques for Integrated Circuit Design by : Ke-Horng Chen

Download or read book Power Management Techniques for Integrated Circuit Design written by Ke-Horng Chen and published by John Wiley & Sons. This book was released on 2016-05-10 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book begins with the premise that energy demands are directing scientists towards ever-greener methods of power management, so highly integrated power control ICs (integrated chip/circuit) are increasingly in demand for further reducing power consumption. A timely and comprehensive reference guide for IC designers dealing with the increasingly widespread demand for integrated low power management Includes new topics such as LED lighting, fast transient response, DVS-tracking and design with advanced technology nodes Leading author (Chen) is an active and renowned contributor to the power management IC design field, and has extensive industry experience Accompanying website includes presentation files with book illustrations, lecture notes, simulation circuits, solution manuals, instructors’ manuals, and program downloads

LTE for UMTS

Author : Harri Holma
Publisher : John Wiley & Sons
ISBN 13 : 0470660007
Total Pages : 578 pages
Book Rating : 4.4/5 (76 download)

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Book Synopsis LTE for UMTS by : Harri Holma

Download or read book LTE for UMTS written by Harri Holma and published by John Wiley & Sons. This book was released on 2011-04-25 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts actively involved in the 3GPP standards and product development, LTE for UMTS, Second Edition gives a complete and up-to-date overview of Long Term Evolution (LTE) in a systematic and clear manner. Building upon on the success of the first edition, LTE for UMTS, Second Edition has been revised to now contain improved coverage of the Release 8 LTE details, including field performance results, transport network, self optimized networks and also covering the enhancements done in 3GPP Release 9. This new edition also provides an outlook to Release 10, including the overview of Release 10 LTE-Advanced technology components which enable reaching data rates beyond 1 Gbps. Key updates for the second edition of LTE for UMTS are focused on the new topics from Release 9 & 10, and include: LTE-Advanced; Self optimized networks (SON); Transport network dimensioning; Measurement results.

Dynamic Power Supply Transmitters

Author : Earl McCune
Publisher : Cambridge University Press
ISBN 13 : 1107059178
Total Pages : 495 pages
Book Rating : 4.1/5 (7 download)

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Book Synopsis Dynamic Power Supply Transmitters by : Earl McCune

Download or read book Dynamic Power Supply Transmitters written by Earl McCune and published by Cambridge University Press. This book was released on 2015-05-21 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Power is dissipated (lost) when this current flows through any resistance, which includes the amplifier's transistor. This dissipated power is the product of the current in the load times the voltage difference between the supply voltage to the amplifier and the output signal voltage. When the voltage supplied to the amplifier is a constant value, and by far the most common design practice, the situation in Fig. 1-2a results. Power dissipation in the amplifier is maximum when the output signal voltage is 1/2 of the supply voltage. When the output signal voltage is higher, even though the current value is larger the voltage drop is less and the power dissipation is lower. Similarly, when the output signal voltage is small, even though the voltage drop is now large the current in the load is smaller and again the power dissipation is lower"--

LTE for UMTS

Author : Harri Holma
Publisher : John Wiley & Sons
ISBN 13 : 0470745479
Total Pages : 450 pages
Book Rating : 4.4/5 (77 download)

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Book Synopsis LTE for UMTS by : Harri Holma

Download or read book LTE for UMTS written by Harri Holma and published by John Wiley & Sons. This book was released on 2009-04-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the editors of the highly successful WCDMA for UMTS, this new book gives a complete and up-to-date overview of Long Term Evolution (LTE) in a systematic and clear manner. It starts with an in-depth explanation of the background and standardization process before moving on to examine the system architecture evolution (SAE). The basics of air interface modulation choices are introduced and key subjects such as 3GPP LTE physical layer and protocol solutions are described. Mobility aspects and radio resource management together with radio and end-to-end performance are assessed. The voice solution and voice capacity in LTE are also illustrated. Finally, the main differences between LTE TDD and FDD modes are examined and HSPA evolution in 3GPP Releases 7 and 8 is described. LTE for UMTS is one of the first books to provide a comprehensive guide to the standards and technologies of LTE. Key features of the book include: Covers all the key aspects of LTE in a systematic manner Presents full description of 3GPP Release 8 LTE Examines the expected performance of LTE Written by experts actively involved in the 3GPP standards and product development.

Analog Design Essentials

Author : Willy M Sansen
Publisher : Springer Science & Business Media
ISBN 13 : 0387257470
Total Pages : 770 pages
Book Rating : 4.3/5 (872 download)

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Book Synopsis Analog Design Essentials by : Willy M Sansen

Download or read book Analog Design Essentials written by Willy M Sansen and published by Springer Science & Business Media. This book was released on 2007-02-03 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book contains all topics of importance to the analog designer which are essential to obtain sufficient insights to do a thorough job. The book starts with elementary stages in building up operational amplifiers. The synthesis of opamps is covered in great detail. Many examples are included, operating at low supply voltages. Chapters on noise, distortion, filters, ADC/DACs and oscillators follow. These are all based on the extensive amount of teaching that the author has carried out world-wide.

High-Frequency Integrated Circuits

Author : Sorin Voinigescu
Publisher : Cambridge University Press
ISBN 13 : 0521873029
Total Pages : 921 pages
Book Rating : 4.5/5 (218 download)

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Book Synopsis High-Frequency Integrated Circuits by : Sorin Voinigescu

Download or read book High-Frequency Integrated Circuits written by Sorin Voinigescu and published by Cambridge University Press. This book was released on 2013-02-28 with total page 921 pages. Available in PDF, EPUB and Kindle. Book excerpt: A transistor-level, design-intensive overview of high speed and high frequency monolithic integrated circuits for wireless and broadband systems from 2 GHz to 200 GHz, this comprehensive text covers high-speed, RF, mm-wave, and optical fibre circuits using nanoscale CMOS, SiGe BiCMOS, and III-V technologies. Step-by-step design methodologies, end-of chapter problems, and practical simulation and design projects are provided, making this an ideal resource for senior undergraduate and graduate courses in circuit design. With an emphasis on device-circuit topology interaction and optimization, it gives circuit designers and students alike an in-depth understanding of device structures and process limitations affecting circuit performance.