Title :
A -80 dB HD3 opamp in 3.3 V CMOS technology using tail current compensation
Author :
Hernes, Bjornar ; Moldsvor, O. ; Saether, T.
Author_Institution :
Nordic VLSI ASA, Trondheim, Norway
Abstract :
The proposed unity gain configuration operational amplifier (opamp) uses a new tail current compensation method to linearize the input differential pair. The circuit, fabricated in a 0.35 μm CMOS process, has HD3 less than -80 dB up to 10 MHz, and less than -60 dB up to 80 MHz input frequency. The supply voltage is 3.3 V and signal amplitude is 1 V p-p. The opamp is well suited as a track and hold buffer
Keywords :
CMOS analogue integrated circuits; compensation; differential amplifiers; harmonic distortion; operational amplifiers; 0.35 micron; 3.3 V; 80 MHz; CMOS technology; HD3 opamp; input differential pair linearisation; operational amplifier; tail current compensation; track/hold buffer; unity gain configuration; CMOS technology; Distortion measurement; Feedback circuits; Frequency; MOSFETs; Output feedback; Tail; Transconductance; Very large scale integration; Voltage;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921829
