Low power supply CMOS differential amplifier topology

摘要

a structure and method for improving differential amplifier operation is provided. High performance, wide bandwidth or very fast CMOS amplifiers are possible using the new circuit topology of the present invention. The differential amplifier of he present invention employs a novel common mode feedback circuit to back bias the body regions of the amplifying transistors in the differential amplifier. The novel configuration is achieved entirely using CMOS fabrication techniques and delivers high performance in both amplifier gain (G) and frequency response (fT) characteristics using a 1 micron (1&mgr;) CMOS technology.