Signal amplifying circuit of communication device
AssigneeRealtek Semiconductor Corp.
InventorShan-Chih TSOU
Life of this patent
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Abstract
A signal amplifying circuit of a communication device is disclosed including: an amplifier comprising a first input terminal, a second input terminal, and an output terminal, wherein the input terminal is coupled with a fixed voltage level; a feedback circuit coupled with the second input terminal and the output terminal of the amplifier; a digital-to-analog converter (DAC); a signal processing circuit; a switch for selectively coupling the second input terminal of the amplifier with the DAC or the signal processing circuit; and a control unit coupled with the switch for controlling the operations of the switch.
Claims10
A signal amplifying circuit of a communication device, comprising:
- an amplifier, comprising a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal is coupled with a fixed-voltage terminal;
- a feedback circuit, coupled with the second input terminal and the output terminal of the amplifier;
- a digital-to-analog converter (DAC);
- a signal processing circuit;
- a switch, configured to selectively couple the second input terminal of the amplifier with the digital-to-analog converter or the signal processing circuit;
- and
- a control unit coupled with the switch and configured to control the operation of the switch.
A signal amplifying circuit of a communication device, comprising:
- a differential amplifier, comprising a first input terminal, a second input terminal, a first output terminal, and a second output terminal, wherein the first output terminal and the second output terminal output a pair of differential signals;
- a first feedback circuit, coupled with the first input terminal and the second output terminal of the differential amplifier;
- a second feedback circuit, coupled with the second input terminal and the first output terminal of the differential amplifier;
- a digital-to-analog converter;
- a signal processing circuit;
- a first switch, configured to selectively couple the first input terminal of the differential amplifier with a first output terminal of the digital-to-analog converter or a first output terminal of the signal processing circuit;
- a second switch, configured to selectively couple the second input terminal of the differential amplifier with a second output terminal of the digital-to-analog converter or a second output terminal of the signal processing circuit;
- and
- a control unit coupled with the first switch and the second switch and configured to control the operation of the first switch and the second switch.
Dependencies are inferred from the claim text.