Supply-voltage driver for a differential amplifier

Details Supply-voltage driver for a differential amplifier Supply-voltage driver for a differential amplifier

H - Electricity

03

F

330/21

H03F 3/45 (2006.01) H03F 1/02 (2006.01) H03F 1/52 (2006.01)

Patent

CA 1155502

Abstract A supply voltage driver for one or more monolith- ic differential amplifiers sharing common power supplies comprises an additional monolithic differential amplifier operated as a voltage follower suspended between a cur- rent source and a current sink. Reference Zener diodes are coupled between the voltage follower output and the power supply terminals of the differential amplifiers to establish operating voltages which track an input signal. Additional current-boosting transistors are provided to provide fast slew rate during signal transistions. Over- drive circuitry is provided to limit the maximum and minimum signal levels.

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