Title :
A pseudo rail-to-rail chopper-stabilized instrumentation amplifier in 0.13 µm CMOS
Author_Institution :
Intel Corp., Chandler, AZ, USA
Abstract :
This paper presents a CMOS chopper-stabilized instrumentation amplifier based on a compact differential difference amplifier (DDA). The DDA itself is based on a high gain and robust two-stage class-AB amplifier. Simulation results show that with chopping frequency at 250 KHz, both the noise density and offset can be reduced by a factor of 10. Detailed practical application considerations of the proposed In-Amp as a current-sensing amplifier in a power management chip are presented.
Keywords :
CMOS integrated circuits; choppers (circuits); instrumentation amplifiers; CMOS; In-Amp; chopping frequency; current-sensing amplifier; differential difference amplifier; frequency 250 kHz; noise density; power management chip; pseudo rail-to-rail chopper-stabilized instrumentation amplifier; simulation result; size 0.13 mum; two-stage class-AB amplifier; CMOS technology; Choppers; Circuits; Differential amplifiers; Frequency; Instruments; Noise robustness; Power supplies; Rail to rail amplifiers; Voltage;
Conference_Titel :
Circuits and Systems, 2009. MWSCAS '09. 52nd IEEE International Midwest Symposium on
Conference_Location :
Cancun
Print_ISBN :
978-1-4244-4479-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2009.5236166
