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A 1 V Low-Noise CMOS Amplifier Using Autozeroing and Chopper Stabilization Technique
Takeshi YOSHIDA Yoshihiro MASUI Takayuki MASHIMO Mamoru SASAKI Atsushi IWATA
IEICE TRANSACTIONS on Electronics
Publication Date: 2006/06/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
low-noise amplifier, autozeroing, chopper stabilization, low-voltage operation, switched op-amp, CMOS,
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A low-noise CMOS amplifier operating at a low supply voltage is developed using the two noise reduction techniques of autozeroing and chopper stabilization. The proposed amplifier utilizes a feedback with virtual grounded input-switches and a multiple-output switched op-amp. The low-noise amplifier fabricated in a 0.18-µm CMOS technology achieved 50-nV/Hz input noise at 1-MHz chopping and 0.5-mW power consumption at 1-V supply voltage.