A 1-V transient-free and DC-offset-canceled PGA with a 17.1-MHz constant bandwidth over 52-dB control range in 0.35-&amp;#x03BC;m

A dual-mode analog baseband with digital-assisted calibration for WCDMA/GSM receivers is presented. The calibration includes automatic DC-offset Calibration (DCOC) and Automatic Frequency Tuning (AFT). The calibration circuits adopt low-complexity and small-area Digital-to-Analog convertors (DAC) that can achieve less than 5mV residual output offset combined with Successive Approximation algorithm (SAR). Every Programmable Gain Amplifier (PGA) stage has small DC-offset after DCOC without performance penalty and the measured IIP 2 is more than 60dBm. The cutoff frequency of Low Pass Filter (LPF) can be tuned very close to targeted value of 200 kHz and 2.1 MHz for GSM and WCDMA, respectively. The chip is manufactured in 0.13 !.1m CMOS technology with power supply of 1.5 V and occupies 1.2mm 2 silicon area excluding pads.I.

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A dual-mode analog baseband utilizing digital-assisted calibration for WCDMA/GSM receivers

Xie

Jiang

et al. 2011

2011 9th IEEE International Conference on ASIC

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Design and test strategy underlying a low-voltage analog-baseband IC for 802.11a/b/g WLAN SiP receivers

Mak

Seng-Pan²,

Martins³

2006 IEEE International Symposium on Circuits and Systems

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A DC-offset cancellation circuit for PGA in baseband communication

Huang

Zhong

et al. 2011

2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS)

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This paper introduces a novel DC-offset cancellation circuit for PGA in baseband communication. The output DC offset is reduced from over one hundred millivolts to less than 4mV in all cases with power dissipation of 6.6,.W. At the same time, spurious-free dynamic range (SFDR) of PGA output is 51.4dB and the settling time of 63dB gain step switching is 372,.s. The chip is fabricated in O.lS,.m CMOS technology.

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A 1-V transient-free and DC-offset-canceled PGA with a 17.1-MHz constant bandwidth over 52-dB control range in 0.35-μm

Cited by 6 publications

References 5 publications

A dual-mode analog baseband utilizing digital-assisted calibration for WCDMA/GSM receivers

A dual-mode analog baseband utilizing digital-assisted calibration for WCDMA/GSM receivers

Design and test strategy underlying a low-voltage analog-baseband IC for 802.11a/b/g WLAN SiP receivers

A DC-offset cancellation circuit for PGA in baseband communication

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