Title :
A rail-to-rail, constant-Gm, 1-volt CMOS opamp
Author :
Bahmani, Faramarz ; Fakhraie, S.M. ; Khakifirooz, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Tehran Univ., Iran
Abstract :
A rail-to-rail, constant-gm, 1-volt only, full-CMOS opamp is presented. The opamp has a complementary PMOS/bulk-driven input stage with a feedback circuit to equalize gm, and a class AB output stage, which provide input and output rail-to-rail operation. HSPICE simulations are performed using BSIM 3.3 models of a 0.8 μm CMOS process. This opamp has a DC gain of 45.1 dB, unity-gain bandwidth of 1.7 MHz, and phase margin of 63.4°
Keywords :
CMOS analogue integrated circuits; SPICE; feedback amplifiers; low-power electronics; operational amplifiers; 0.8 micron; 1 V; 1.7 MHz; 45.1 dB; BSIM 3.3 model; CMOS opamp; HSPICE simulation; class AB output stage; complementary input stage; constant transconductance feedback circuit; low voltage analog circuit; rail-to-rail operation; Analog circuits; Bandwidth; CMOS process; Circuit simulation; Feedback circuits; MOSFETs; Rail to rail operation; Semiconductor device modeling; Threshold voltage; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856417
