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US 9,793,864 B2Granted
Voltage detecting circuit and power amplifier
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJun Goo Won, Youn Suk Kim, Ki Joong Kim, Da Hye Park
Life of this patent
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Abstract
A voltage detecting apparatus includes a signal extracting circuit configured to extract a coupled signal from a signal output by a power amplifier configured to amplify a signal output by a radio frequency (RF) circuit, and a voltage detecting circuit configured to detect a detection voltage from the coupled signal and provide the detection voltage to the RF circuit. The voltage detecting circuit configured to vary the detection voltage in response to an input control signal.
Claims23
A voltage detecting apparatus comprising:
- a signal extracting circuit configured to extract a coupled signal from a signal output by a power amplifier configured to amplify a signal output by a radio frequency (RF) circuit;
- a detection voltage controller configured to generate a control signal dependent on the coupled signal;
- and
- a voltage detecting circuit configured to detect a detection voltage from the coupled signal and provide the detection voltage to the RF circuit dependent on the generated control signal,
- wherein the voltage detecting circuit varies the detection voltage in response to the generated control signal input to the voltage detecting circuit.
2 more elements
A voltage detecting apparatus comprising:
- a signal extracting circuit configured to extract a coupled signal from a signal output by a power amplifier configured to amplify a signal output by a radio frequency (RF) circuit;
- and
- a voltage detecting circuit configured to detect a detection voltage from the coupled signal and to provide the detection voltage to the RF circuit,
- wherein the voltage detecting circuit varies the detection voltage in response to a control signal input to the voltage detecting circuit, and wherein the voltage detecting circuit comprises:
- a bias circuit configured to divide a reference voltage through at least two dividing resistors to provide a bias voltage, one of the at least two dividing resistors being varied in response to a first control signal of the control signal;
- a rectifier biased by the bias voltage and configured to rectify a voltage of the coupled signal and to provide the rectified voltage;
- and
- a filter configured to filter the rectified voltage through at least two filter elements to provide the detection voltage, one of the at least two filter elements being varied in response to a second control signal of the control signal.
5 more elements
A power amplifier apparatus comprising:
- a radio frequency (RF) circuit configured to process an input signal;
- a power amplifier configured to amplify a signal output by the RF circuit;
- a signal extracting circuit configured to extract a coupled signal from a signal output by the power amplifier;
- a detection voltage controller configured to generate a control signal dependent on the coupled signal;
- and
- a voltage detecting circuit configured to detect a detection voltage from the coupled signal and provide the detection voltage to the RF circuit dependent on the generated control signal, wherein the voltage detecting circuit is configured to vary the detection voltage in response to the generated control signal input to the voltage detecting circuit.
3 more elements
A power amplifier apparatus comprising:
- a radio frequency (RF) circuit configured to process an input signal;
- a power amplifier configured to amplify a signal output by the RF circuit;
- a signal extracting circuit configured to extract a coupled signal from a signal output by the power amplifier;
- a detection voltage controller configured to generate a control signal dependent on the coupled signal;
- and
- a voltage detecting circuit configured to detect a detection voltage from the coupled signal and provide the detection voltage to the RF circuit dependent on the generated control signal,
- wherein the voltage detecting circuit varies the detection voltage in response to the generated control signal input to the voltage detecting circuit.
4 more elements
A method for controlling a voltage detecting apparatus comprising:
- actuating an amplifier to accept an input signal received from an RF circuit and to output an amplified signal;
- extracting a coupled signal from the amplified signal;
- generating a control signal dependent on the coupled signal;
- detecting a detection voltage from the coupled signal and providing the detection voltage to the RF circuit dependent on the generated control signal;
- and,
- adaptively varying the detection voltage in response to the generated control signal input to the voltage detecting circuit.
3 more elements
A voltage detecting apparatus comprising:
- a signal extracting circuit configured to extract a coupled signal from a signal output by a power amplifier configured to amplify a signal output by a radio frequency (RF) circuit;
- and
- a voltage detecting circuit configured to detect a detection voltage from the coupled signal and provide the detection voltage to the RF circuit,
- wherein the voltage detecting circuit varies the detection voltage in response to a control signal input to the voltage detecting circuit, and
- wherein the voltage detecting circuit comprises a filter that includes a first resistance in series with a transistor that is provided the control signal, the first resistance and the transistor being further configured in parallel with a second resistance, so a resistance level of the filter is reduced when a first control signal of the control signal turns the transistor on to vary the detection voltage.
2 more elements
Dependencies are inferred from the claim text.