High-frequency signal processing apparatus and wireless communication apparatus
A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.
1. A power amplifier module comprising:
a power amplifying circuit configured to amplify an input signal and to output an output signal, wherein:
the power amplifying circuit is configured to receive a source voltage and a bias signal,
the source voltage is configured to:
increase as an average power level of the output signal increases, when the power amplifier module is operating in a first operation mode, and
vary along an envelope of the input signal, when the power amplifier module is operating in a second operation mode,
the bias signal has a first value, when the power amplifier module is operating in the first operation mode,
the bias signal has a second value different from the first value, when the power amplifier module is operating in the second operation mode,
the power amplifier module is configured to switch an operation in the first operation mode and to switch an operation in the second operation mode based on a relationship between the average power level and a reference value.
2. The power amplifier module according to claim 1 , wherein the first value is variable when the power amplifier module is operating in the first operation mode, and the second value is fixed when the power amplifier module is operating in the second operation mode.
3. The power amplifier module according to claim 1 , further comprising a coupler configured to detect the output signal.
4. A radio frequency circuit comprising: a duplexer and;
a power amplifying circuit configured to amplify an input signal and to output an output signal, wherein:
the power amplifying circuit is configured to receive a source voltage and a bias signal,
the source voltage is configured to:
increase as an average power level of the output signal increases, when the power amplifier module is operating in a first operation mode, and
vary along an envelope of the input signal, when the power amplifier module is operating in a second operation mode,
the bias signal has a first value, when the power amplifier module is operating in the first operation mode,
the bias signal has a second value different from the first value, when the power amplifier module is operating in the second operation mode,
the power amplifier module is configured to switch an operation in the first operation mode and to switch an operation in the second operation mode based on whether the average power level is less than a reference value or not.
5. The radio frequency circuit according to claim 4 , wherein the first value is variable when the power amplifier module is operating in the first operation mode, and the second value is fixed when the power amplifier module is operating in the second operation mode.
6. The radio frequency circuit according to claim 4 , further comprising a coupler configured to detect the output signal.