Amplifying circuit
AssigneeRealtek Semiconductor Corp.
InventorChih-Chan TU
Life of this patent
Estimating the term…
Abstract
An amplifying circuit including a first gain circuit, a second gain circuit, a Miller capacitor, a positive feedback circuit and a feedforward gain circuit. The second gain circuit is configured to receive a first gain signal from the first gain circuit and generate a second gain signal. The Miller capacitor, the positive feedback circuit and the feedforward gain circuit are electrically coupled between an input terminal and an output terminal of the second gain circuit. The positive feedback circuit is configured to feedback the signal of the output terminal of the second gain circuit to the input terminal of the second gain circuit. The feedforward gain circuit is configured to amplify the first gain signal to output a third gain signal to the output terminal of the second gain circuit.
Claims18
An amplifying circuit, comprising:
- a first gain circuit configured to amplify an input signal to generate a first gain signal;
- a second gain circuit electrically coupled to the first gain circuit, and configured to amplify the first gain signal to generate a second gain signal;
- a Miller capacitor electrically coupled between to an input terminal and an output terminal of the second gain circuit;
- a positive feedback circuit electrically coupled between to the input terminal and the output terminal of the second gain circuit, and configured to feedback a signal of the output terminal of the second gain circuit to the input terminal of the second gain circuit;
- and
- a feedforward gain circuit electrically coupled between to the input terminal and the output terminal of the second gain circuit, wherein the feedforward gain circuit is configured to amplify the first gain signal to output a third gain signal to the output terminal of the second gain circuit.
An amplifying circuit, comprising:
- a first gain circuit configured to amplify an input signal to generate a first gain signal;
- a second gain circuit electrically coupled to the first gain circuit, and configured to amplify the first gain signal to generate a second gain signal;
- a positive feedback circuit electrically coupled between to an input terminal and an output terminal of the second gain circuit, and configured to feedback a signal of the output terminal of the second gain circuit to the input terminal of the second gain circuit;
- and
- a feedforward gain circuit electrically coupled between to the input terminal and the output terminal of the second gain circuit, comprising at least two feedforward gain amplifiers, wherein the at least two feedforward gain amplifiers are configured to amplify the first gain signal to output a third gain signal to the output terminal of the second gain circuit.
An amplifying circuit, comprising:
- a first gain circuit configured to amplify an input signal to generate a first gain signal;
- a second gain circuit electrically coupled to the first gain circuit, and configured to amplify the first gain signal to generate a second gain signal;
- a Miller capacitor electrically coupled between to an input terminal and an output terminal of the second gain circuit;
- and
- a feedforward gain circuit electrically coupled between to the input terminal and the output terminal of the second gain circuit, and comprising a first feedforward gain amplifier, a second feedforward gain amplifier and a feedforward capacitor, wherein a first terminal of the feedforward capacitor is electrically coupled between the first feedforward gain amplifier and the second feedforward gain amplifier, the first feedforward gain amplifier and the second feedforward gain amplifier are configured to amplify the first gain signal to output a third gain signal to the output terminal of the second gain circuit.
Dependencies are inferred from the claim text.