Title :
A 36nV/√Hz noise PSD chopper-stabilized CMOS amplifier with a new ripple-spur-filter scheme
Author :
Peng Sun ; Menglian Zhao ; Xiaobo Wu
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
A low-noise, low-power CMOS amplifier is developed using the chopper-stabilized technique. A new filter scheme is employed to suppress chopping ripple and spur. It composes of a band-pass amplifier, a novel low-pass-chopper (LPC) and a low-pass class-AB output stage. With the LPC, the amplifier rejects unexpected high frequency signal by about extra -12dB, which shares burden of the band-pass amplifier. The proposed amplifier is simulated in TSMC 0.35-μm CMOS process and a noise PSD of 36nV/√Hz and a unity gain bandwidth of 1MHz with an overall current consumption of 14.5μA are achieved.
Keywords :
CMOS analogue integrated circuits; band-pass filters; circuit stability; integrated circuit noise; low noise amplifiers; low-pass filters; low-power electronics; LPC; TSMC CMOS process; band-pass amplifier; bandwidth 1 MHz; chopper-stabilized CMOS amplifier; chopping ripple suppression; chopping spur suppression; current 14.5 muA; high frequency signal; low-noise low-power CMOS amplifier; low-pass class-AB output stage; low-pass-chopper; noise PSD; ripple-spur-filter scheme; size 0.35 mum; Band pass filters; CMOS integrated circuits; Choppers (circuits); Low pass filters; Low-frequency noise; Topology;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467728