A 10 MHz bandwidth, 2 mV ripple PA regulator for CDMA transmitters

Wing Yee Chu; Bertan Bakkaloglu; Sayfe Kiaei

doi:10.1109/JSSC.2008.2005743

A 10 MHz bandwidth, 2 mV ripple PA regulator for CDMA transmitters

Wing Yee Chu, Bertan Bakkaloglu, Sayfe Kiaei

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

A combined class-AB and switch-mode regulator based supply modulator with a masterslave architecture achieving wide bandwidth and low ripple is presented. Low frequency content of the envelope waveform is provided by a synchronous-rectifier based switch-mode power supply while high frequency content is provided by a rail-to-rail class-AB amplifier. A wide range, low loss output current sensing circuit is used at the class-AB amplifier output, canceling the ripple due to switch-mode power supply and extending overall modulator bandwidth. The proposed regulator is designed and fabricated on a 0.35 μm CMOS process. The combined regulator achieves a maximum efficiency of 82% and an IMD3 of 65 dBc at 10 MHz for 16 dBm output power. The regulator achieves a frequency range up to 10 MHz with less than 0.2% envelope tracking error, making this PA regulator suitable for CDMA applications.

Original language	English (US)
Article number	4684656
Pages (from-to)	2809-2819
Number of pages	11
Journal	IEEE Journal of Solid-State Circuits
Volume	43
Issue number	12
DOIs	https://doi.org/10.1109/JSSC.2008.2005743
State	Published - Dec 2008

Keywords

CDMA
Envelope tracking
PA regulator
Power amplifier
Supply modulator

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/JSSC.2008.2005743

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title = "A 10 MHz bandwidth, 2 mV ripple PA regulator for CDMA transmitters",

abstract = "A combined class-AB and switch-mode regulator based supply modulator with a masterslave architecture achieving wide bandwidth and low ripple is presented. Low frequency content of the envelope waveform is provided by a synchronous-rectifier based switch-mode power supply while high frequency content is provided by a rail-to-rail class-AB amplifier. A wide range, low loss output current sensing circuit is used at the class-AB amplifier output, canceling the ripple due to switch-mode power supply and extending overall modulator bandwidth. The proposed regulator is designed and fabricated on a 0.35 μm CMOS process. The combined regulator achieves a maximum efficiency of 82% and an IMD3 of 65 dBc at 10 MHz for 16 dBm output power. The regulator achieves a frequency range up to 10 MHz with less than 0.2% envelope tracking error, making this PA regulator suitable for CDMA applications.",

keywords = "CDMA, Envelope tracking, PA regulator, Power amplifier, Supply modulator",

author = "Chu, {Wing Yee} and Bertan Bakkaloglu and Sayfe Kiaei",

note = "Funding Information: Manuscript received April 07, 2008; revised July 21, 2008. Current version published December 10, 2008. This work was supported by the National Science Foundation under NSF Award 0533151 and by Texas Instruments Inc. Wireless Terminals Business Unit.",

year = "2008",

month = dec,

doi = "10.1109/JSSC.2008.2005743",

language = "English (US)",

volume = "43",

pages = "2809--2819",

journal = "IEEE Journal of Solid-State Circuits",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - A 10 MHz bandwidth, 2 mV ripple PA regulator for CDMA transmitters

AU - Chu, Wing Yee

AU - Bakkaloglu, Bertan

AU - Kiaei, Sayfe

N1 - Funding Information: Manuscript received April 07, 2008; revised July 21, 2008. Current version published December 10, 2008. This work was supported by the National Science Foundation under NSF Award 0533151 and by Texas Instruments Inc. Wireless Terminals Business Unit.

PY - 2008/12

Y1 - 2008/12

N2 - A combined class-AB and switch-mode regulator based supply modulator with a masterslave architecture achieving wide bandwidth and low ripple is presented. Low frequency content of the envelope waveform is provided by a synchronous-rectifier based switch-mode power supply while high frequency content is provided by a rail-to-rail class-AB amplifier. A wide range, low loss output current sensing circuit is used at the class-AB amplifier output, canceling the ripple due to switch-mode power supply and extending overall modulator bandwidth. The proposed regulator is designed and fabricated on a 0.35 μm CMOS process. The combined regulator achieves a maximum efficiency of 82% and an IMD3 of 65 dBc at 10 MHz for 16 dBm output power. The regulator achieves a frequency range up to 10 MHz with less than 0.2% envelope tracking error, making this PA regulator suitable for CDMA applications.

AB - A combined class-AB and switch-mode regulator based supply modulator with a masterslave architecture achieving wide bandwidth and low ripple is presented. Low frequency content of the envelope waveform is provided by a synchronous-rectifier based switch-mode power supply while high frequency content is provided by a rail-to-rail class-AB amplifier. A wide range, low loss output current sensing circuit is used at the class-AB amplifier output, canceling the ripple due to switch-mode power supply and extending overall modulator bandwidth. The proposed regulator is designed and fabricated on a 0.35 μm CMOS process. The combined regulator achieves a maximum efficiency of 82% and an IMD3 of 65 dBc at 10 MHz for 16 dBm output power. The regulator achieves a frequency range up to 10 MHz with less than 0.2% envelope tracking error, making this PA regulator suitable for CDMA applications.

KW - CDMA

KW - Envelope tracking

KW - PA regulator

KW - Power amplifier

KW - Supply modulator

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JF - IEEE Journal of Solid-State Circuits

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M1 - 4684656

ER -

A 10 MHz bandwidth, 2 mV ripple PA regulator for CDMA transmitters

Abstract

Keywords

ASJC Scopus subject areas

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