Title :
A BiCMOS current-feedback operational amplifier with a 60 dB constant bandwidth range
Author :
Koli, Kimmo ; Halonen, Kari
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
fDate :
30 May-2 Jun 1994
Abstract :
The designed BiCMOS current-feedback operational amplifier utilizes a novel circuit topology which enables constant 1 MHz bandwidth closed loop voltage gains up to 60 dB. The offset current of the current-feedback amplifier is canceled with an active OTA-C feedback loop. The amplifier is fabricated with a 1.2 micron BiCMOS-process (NPN fT 7 GHz)
Keywords :
BiCMOS analogue integrated circuits; feedback amplifiers; operational amplifiers; wideband amplifiers; 1 MHz; 1.2 micron; 60 dB; BiCMOS current-feedback opamp; active OTA-C feedback loop; circuit topology; constant bandwidth range; offset current cancellation; operational amplifier; Bandwidth; BiCMOS integrated circuits; Capacitance; Circuit topology; Equivalent circuits; Frequency; Operational amplifiers; Output feedback; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409427
