Title :
A fast-settling CMOS op amp with 90 dB DC-gain and 116 MHz unity-gain frequency
Author :
Bult, Klaas ; Geelen, Govert
Author_Institution :
Philips Research Lab., Eindhoven, Netherlands
Abstract :
An op amp that exhibits single-pole settling behavior using an auxiliary amplifier that boosts gain without degrading settling time is described. The technique for increasing the DC gain is based on increasing cascoding by adding an additional gain stage. In this way the output impedance present at a node is increased by the gain of the additional gain stage.<>
Keywords :
CMOS integrated circuits; linear integrated circuits; operational amplifiers; 116 MHz; 90 dB; CMOS; DC-gain; auxiliary amplifier; cascoding; fast-settling; op amp; single-pole settling behavior; Bandwidth; Degradation; Frequency measurement; Impedance; Laboratories; Leakage current; Operational amplifiers; Switches; Switching circuits; Transconductance;
Conference_Titel :
Solid-State Circuits Conference, 1990. Digest of Technical Papers. 37th ISSCC., 1990 IEEE International
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/ISSCC.1990.110152
