Amplification circuit with low quiescent current
OwnerRui Wang, Jinyan Lin +2inventors
InventorsRui Wang, Jinyan Lin, Huijie Zhao, Yunping Lang
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Abstract
The embodiments of the present circuit and method disclose an amplification circuit including a voltage regulator, a negative charge pump and an amplifier. The output of the voltage regulator supplies the upper voltage supply of the amplifier and the output of the negative charge pump supplies the lower voltage supply of the amplifier. The voltage regulator and the negative charge pump make the power supply of the amplifier flexible, easy to be fabricated in semiconductor process.
Claims20
A circuit, comprising:
- a first regulator comprising a first input and a first output, the first output is regulated at a predetermined voltage;
- a charge pump comprising a second input and a second output;
- and
- an amplifier comprising an upper power supply input coupled to the first output, and a lower power supply input coupled to the second output.
A circuit, comprising:
- a switching circuit, comprising a switch string, wherein the switching circuit has a first input and a first output, and wherein the first output is configured to output a positive voltage;
- a charge pump, having a second input and a second output, wherein the second output is configured to output a negative voltage;
- and
- an amplifier, having an upper power supply input coupled to the first output, and a lower power supply input coupled to the second output.
A method of supplying power to an amplifier, the method comprising:
- regulating a first voltage into a first output voltage in positive value;
- charge pumping a second input and providing a second output voltage in negative value;
- and
- using the first output supplying the amplifier at the upper power supply input and using the second output supplying the amplifier at the lower power supply input.
Dependencies are inferred from the claim text.