Mixed voltage driving circuit

摘要

A driving circuit is provided. The driving circuit has: a level shifter configured to receive a reference voltage and an input signal at a first voltage to generate a second voltage; an differential amplifier, coupled to the level shifter, configured to receive the second voltage and an output signal to provide an operating voltage, wherein the differential amplifier is supplied by a first power source at a third voltage; and an output stage, coupled to the differential amplifier, configured to receive the input signal and the operating voltage for switching the output signal, wherein the first voltage is smaller than the third voltage, and the output signal has a fourth voltage between the first voltage and the third voltage.

主权项

1. A driving circuit generating an output signal according to an input signal and a reference voltage, comprising:
a level shifter configured to receive the reference voltage with a second voltage level and the input signal with a first voltage level to generate a reference signal; a differential amplifier, coupled to the level shifter, having a first input terminal coupled to the reference signal, a second input terminal coupled to the output signal, and an output terminal, wherein the differential amplifier is supplied by an operation voltage with a third voltage level; and an output stage, coupled to the second input terminal and the output terminal of the differential amplifier, configured to receive the input signal and the operation voltage to generate the output signal, wherein the second input terminal is coupled to the output terminal of the differential amplifier according to the input signal, wherein the first voltage level is smaller than the third voltage level, and the second voltage level is between the first voltage level and the third voltage level.