Title :
CMOS Current-mode Operational Amplifier
Author :
Kaulberg, Thomas
Author_Institution :
Electron. Inst., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
A fully differential-input differential-output current-mode operational amplifier (COA) is described. The amplifier utilizes three second generation current-conveyors (CCII) as the basic building blocks. It can be configured to provide either a constant gain-bandwidth product in a fully balanced current-mode feedback amplifier or a constant bandwidth in a transimpedance feedback amplifier. The amplifier is found to have a gain bandwidth product of 8 MHz, an offset current of 0.8 μA (signal-range ±700 μA ) and a (theoretically) unlimited slew-rate. The amplifier is realized in a standard CMOS 2.4 μm process.
Keywords :
CMOS analogue integrated circuits; current conveyors; operational amplifiers; CCII; CMOS current-mode operational amplifier; COA; constant gain-bandwidth product; current 0.8 muA; differential-input differential-output current- mode operational amplifier; frequency 8 MHz; second generation current-conveyors; size 2.4 mum; transimpedance feedback amplifier; Analog circuits; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS technology; Capacitors; Digital circuits; Marine technology; Mirrors; Operational amplifiers; Topology;
Conference_Titel :
Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European
Conference_Location :
Copenhagen
Print_ISBN :
87-984232-0-7
DOI :
10.1109/ESSCIRC.1992.5468207
