A 1 V instrumentation amplifier

Author

Huang, Huanzhang ; Karthikeyan, Soundarapandian ; Lee, Edward K F

Author_Institution

Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

170

Abstract

This paper describes the design and the implementation of a 1 V instrumentation amplifier in a 1.2 μm CMOS process with V_TN=0.6 V and V_TP≈-0.8 V. The instrumentation amplifier has a peak-to-peak output signal swing of ±350 mV. It uses two 1 V opamps and a Norton amplifier. The input impedance of the instrumentation amplifier has been increased with a feedback structure as described in the paper. Experimental results show that the -3 dB bandwidth is approximately 900 kHz. For a peak-to-peak output voltage of 700 mV, the THD is found to be less than -60 dB at 10 kHz for a loading capacitance of 20 pF. The instrumentation amplifier was designed to have a differential gain of 10

Keywords

CMOS analogue integrated circuits; feedback amplifiers; instrumentation amplifiers; low-power electronics; 1 V; 1.2 micron; 900 kHz; CMOS analog circuit; Norton amplifier; THD; bandwidth; differential gain; feedback structure; input impedance; instrumentation amplifier; loading capacitance; low-voltage IC; opamp; peak-to-peak output voltage; Bandwidth; CMOS process; Capacitance; Differential amplifiers; Feedback; Impedance; Instruments; Signal design; Signal processing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. 42nd Midwest Symposium on

Conference_Location

Las Cruces, NM

Print_ISBN

0-7803-5491-5

Type

conf

DOI

10.1109/MWSCAS.1999.867235

Filename

867235