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US 2008/0303595 A1Published application
Amplifying circuit
AssigneeRealtek Semiconductor Corp.
InventorsChao-Cheng LEE, Yi-Kuang Chen
Life of this patent
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Abstract
An amplifier includes: a class AB input stage, receiving an input signal, for generating an inner signal according to the input signal; class AB output stage, includes: a biasing circuit, for providing a first voltage and a second voltage according to the inner signal; and an output stage, for generating an output signal according to the first voltage and the second voltage; wherein a voltage difference between the first voltage and the second voltage generated by the biasing circuit is corresponding to the input signal.
Claims18
A circuit, comprising:
- a class AB input stage circuit, for receiving an input signal and generating an inner signal according to the input signal;
- and
- a class AB output stage circuit, coupled to the class AB input stage circuit, comprising:
- a biasing circuit, for generating a first biasing signal and a second biasing signal according to the inner signal;
- and
- an output circuit, coupled to the biasing circuit, for generating an output signal according to the first biasing signal and the second biasing signal;
- wherein a voltage difference between the first biasing signal and the second biasing signal is corresponding to the input signal.
4 more elements
A circuit, comprising:
- an input stage circuit, receiving an input signal for generating a first current signal and a second current signal;
- an output stage circuit, coupled to the input stage circuit, the output stage circuit comprising:
- a voltage generating circuit, coupled to the input stage circuit, providing a voltage difference according to the first current signal and the second current signal;
- and
- an output circuit, coupled to the voltage generating circuit, for generating an output signal according to the voltage difference;
- wherein a sum of the first current signal and the second current signal is corresponding to a swing of the input signal.
3 more elements
Dependencies are inferred from the claim text.