A 1 V Low-Noise CMOS Amplifier Using Autozeroing and Chopper Stabilization Technique

Takeshi YOSHIDA
Yoshihiro MASUI
Takayuki MASHIMO
Mamoru SASAKI
Atsushi IWATA

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C    No.6    pp.769-774
Publication Date: 2006/06/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.6.769
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
Category: 
Keyword: 
low-noise amplifier,  autozeroing,  chopper stabilization,  low-voltage operation,  switched op-amp,  CMOS,  

Full Text: PDF(1MB)>>
Buy this Article


Summary: 
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.