Driver circuit and operational amplifier circuit used therein
AssigneeNovatek Microelectronics Corp.
InventorsDe-Shiou Tseng, Wei-Ta Chiu
Life of this patent
Estimating the term…
Abstract
A driver circuit includes a first operational amplifier circuit, a second operational amplifier circuit, and at least one power switching circuit is provided. The first operational amplifier circuit receives a first input signal and generates a first output signal according to the first input signal. The second operational amplifier circuit receives a second input signal and generates a second output signal according to the second input signal. The at least one power switching circuit is coupled to the first operational amplifier circuit and the second operational amplifier circuit, and configured to switch at least one power supply for both the first operational amplifier circuit and the second operational amplifier circuit.
Claims28
A driver circuit, comprising:
- a first operational amplifier circuit for receiving a first input signal and generating a first output signal according to the first input signal;
- a second operational amplifier circuit, for receiving a second input signal and generating a second output signal according to the second input signal when the first operational amplifier circuit outputs the first output signal;
- and
- at least one power switching circuit, coupled to the first operational amplifier circuit and the second operational amplifier circuit, and configured to switch at least one power supply for both the first operational amplifier circuit and the second operational amplifier circuit;
- wherein the first operational amplifier circuit has a first input stage circuit, and the second operational amplifier circuit has a second input stage circuit, and the first operational amplifier circuit and the second operational amplifier circuit share a first output stage circuit and a second output stage circuit.
A driver circuit for driving a panel, comprising:
- a first input stage circuit, for receiving a first input signal and amplifying the first input signal to generate a first amplified signal;
- a second input stage circuit, for receiving a second input signal and amplifying the second input signal to generate a second amplified signal;
- a first output stage circuit;
- a second output stage circuit;
- and
- at least one power switching circuit, coupled to the first input stage circuit and the second input stage circuit for switching at least one voltage range of at least one power supply for each of the first input stage circuit and the second input stage circuit, and for switching the first input stage circuit to be coupled to one of the first output stage circuit and the second output stage circuit and for switching the second input stage circuit to be coupled to the other one of the first output stage circuit and the second output stage circuit.
Dependencies are inferred from the claim text.