A Low-Voltage CMOS Rail-to-Rail Class-AB Input/Output OpAmp With Slew-Rate And Settling Enhancement - Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
نویسندگان
چکیده
A low-voltage CMOS rail-to-rail OpAmp with high slew-rate and fast-settling is presented. The input stage is composed of the complementary differential pairs, a pair of modified current-mode maximum selecting circuits (Maximum Current Selecting Circuit 11) and a class-AB feedback loop circuit. It achieves rail-to-rail operation, constant-gm ,high slewrate and fast-settling. With this OpAmp topology, the design can be easily performed for a wide-range of capacitive loads with a large bandwidth-to-powerconsumption ratio. With 2pm and 0.5pm technology respectively, the OpAmp has a high DC gain (>84dB), and has a bandwidth-to-power-consumption ratio of 13.6MHzImW and 25.8MHzImW with capacitive loads of 20pF, 86V/ps, 9OV/ps slew-rate and 159ns, 36x1s settling-time.
منابع مشابه
High slew rate, low voltage BiCMOS and bipolar operational amplifier architectures with rail to rail - Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Class AB differential amplifiers using composite BiCMOS and bipolar transistors are introduced. Their utilization for the implementation of low voltage (+-1.65V) operational amplifiers with high slew rate and rail to rail common mode input voltage range is discussed.
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