Title :
Design of current mode operational amplifier with differential-input and differential-output
Author :
Cheng, Kuo-Hsing ; Wang, Huei-Chi
Author_Institution :
Dept. of Electr. Eng., Tamkang Univ., Taipei Hsien, Taiwan
Abstract :
In this paper, a CMOS implementation of a current operational amplifier (COA) with a differential input and a differential output is described. The amplifier is configured from a differential current mirror input transimpedance stage followed by a differential output transconductance gain stage. A differential mode design technique is proposed and used in the feedback circuit. This configuration is the current mode counterpart of the traditional voltage mode operational amplifier (VOA). In this design, the simulation results exhibit an open-loop differential gain of 51.71 dB with the gain-bandwidth product 314 MHz and a settling time of 14 ns
Keywords :
CMOS analogue integrated circuits; circuit analysis computing; differential amplifiers; digital simulation; feedback amplifiers; integrated circuit design; operational amplifiers; 14 ns; 51.71 dB; CMOS implementation; current mirror input transimpedance stage; current mode operational amplifier; differential mode design technique; differential-input amplifier; differential-output amplifier; feedback circuit; gain-bandwidth product; open-loop differential gain; settling time; simulation results; transconductance gain stage; Analog circuits; Circuit simulation; Differential amplifiers; Feedback circuits; Impedance; Mirrors; Operational amplifiers; Signal processing; Transconductance; Voltage control;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608639
