HIGH SLEW RATE OPERATIONAL AMPLIFIER AND OPERATING METHOD THEREOF

摘要

A high slew rate operational amplifier including an input terminal, an output terminal, and at least one slew-rate enhancing circuit is disclosed. Each slew-rate enhancing circuit includes a first stage enhancing unit and a second stage enhancing unit. The first stage enhancing unit is coupled between the input terminal and the output terminal. The first stage enhancing unit and the second stage enhancing unit are coupled. The slew-rate enhancing circuit has a threshold voltage and the threshold voltage is related to the size of the first stage enhancing unit. When the threshold voltage is driven, the slew-rate enhancing circuit will rapidly start the second stage enhancing unit to perform a slew rate compensation on the high slew rate operational amplifier.

主权项

1. A high slew rate operational amplifier, comprising:
an input terminal; an output terminal; and at least one slew-rate enhancing circuit, a slew-rate enhancing circuit of the at least one slew-rate enhancing circuit comprising a first stage enhancing unit and a second stage enhancing unit, wherein the first stage enhancing unit is coupled between the input terminal and the output terminal, the first stage enhancing unit and the second stage enhancing unit are coupled, the slew-rate enhancing circuit has a threshold voltage and the threshold voltage is related to a size of the first stage enhancing unit, when the slew-rate enhancing circuit is driven by the threshold voltage, the slew-rate enhancing circuit rapidly activates the second stage enhancing unit to perform a slew rate compensation on the high slew rate operational amplifier.