DocumentCode :
2568749
Title :
CMOS chopper amplifier for monolithic magnetic hall sensor
Author :
Yang, Wen-Rong ; Ran, Feng
Author_Institution :
Shanghai Univ., Shanghai
fYear :
2007
fDate :
22-25 Oct. 2007
Firstpage :
439
Lastpage :
441
Abstract :
This paper describes a highly sensitive CMOS chopper amplifier for a monolithic magnetic hall sensor. It is realized by using chopper stabilization technique to overcome the low frequency noise and drift problems. In order to eliminate the residual offset due to input switching transient spikes, we choose a double track-and-hold (T/H)-based demodulation. This chopper amplifier can effectively eliminate the amplifier input offset, low-frequency input noise components and residual offsets due to input switching spikes, without requiring any low-pass filtering.
Keywords :
CMOS integrated circuits; Hall effect transducers; choppers (circuits); magnetic sensors; CMOS chopper amplifier; chopper stabilization technique; frequency noise-drift problems; low-frequency input noise components; monolithic magnetic hall sensor; residual offsets; switching spikes; Choppers; Demodulation; Frequency; Low-frequency noise; Low-noise amplifiers; Magnetic noise; Magnetic sensors; Sampling methods; Sensor phenomena and characterization; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
ASIC, 2007. ASICON '07. 7th International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4244-1132-0
Electronic_ISBN :
978-1-4244-1132-0
Type :
conf
DOI :
10.1109/ICASIC.2007.4415661
Filename :
4415661
Link To Document :
بازگشت