Amplifier circuit with overshoot suppression
AssigneeNovatek Microelectronics Corp.
InventorsChia-Wei Su, Ju-Lin Huang, Keko-Chun Liang
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Abstract
An amplifier circuit with an overshoot suppress scheme is provided. The amplifier circuit includes an input amplifier, an output amplifier and a diode device. The output amplifier is coupled to the input amplifier and outputs an output voltage. The diode device is coupled between an output end and an input end of the output amplifier. When a voltage difference between the output end and the input end of the output amplifier is greater than a barrier voltage of the diode device, the diode device is turned on, and an overshoot of the output voltage is reduced.
Claims25
An amplifier circuit, comprising:
- an input amplifier;
- an output amplifier, comprising:
- a PMOSFET having a gate electrode serving as a first input end and a drain coupled to an output end;
- and
- an NMOSFET having a gate electrode serving as a second input end and a drain coupled to the output end, wherein the output amplifier outputting an output voltage at the output end and coupled to the input amplifier via at least one of the first and second input ends;
- and
- a diode device coupled between the output end and the at least one of the first and second input ends of the output amplifier, wherein when a voltage difference between the output end and the at least one of the first and second input ends of the output amplifier is greater than a barrier voltage of the diode device, the diode device is turned on, and an overshoot of the output voltage is reduced.
Dependencies are inferred from the claim text.