A HIGH SLEW-RATE CMOS AMPLIFIER FOR ANALOG SIGNAL-PROCESSING

The performance of several types of analog VLSI circuits is limited by the settling behavior of CMOS amplifiers. An amplifier with a nonsaturated input stage which achieves a high slew-rate response is presented. The impact of this high slew-rate amplifier on switched-capacitor circuits is described. Prototyping amplifier circuits were fabricated by the MOSIS Service using a 2-μm scalable CMOS technology. When biased at the dc power dissipation of 1 mW, the two-stage amplifier achieves a slew rate of 80 V/μs, a positive-supply rejection ratio of 73 dB, and a negative-supply rejection ratio of 57 dB at 50 kHz. © 1990 IEEE