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,
the power amplifier module is configured to switch an operation in a first operation mode and to switch an operation in a second operation mode based on at least a relationship between an output power level of the output signal and a first predetermined reference value,
the source voltage is configured to increase as the output power level of the output signal increases, when the power amplifier module is operating in the first operation mode,
the source voltage is configured to be fixed when the power amplifier module is operating in the second operation mode,
the output power level is greater than the first predetermined reference level and equal to or less than a maximum output power level, when the power amplifier module is operating in the first operation mode,
the power amplifier module is configured to operate in a third operation mode,
the source voltage is configured to vary along an envelope of the input signal, when the power amplifier module is operating in the third operation mode, and
the output power level is equal to or greater than a second predetermined reference level that is higher than the first predetermined reference level and less than the maximum output power level, when the power amplifier module is operating in the third operation mode.
2. 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,
the power amplifier module is configured to switch an operation in a first operation mode and to switch an operation in a second operation mode based on at least a relationship between an output power level of the output signal and a first predetermined reference value,
the source voltage is configured to increase as the output power level of the output signal increases, when the power amplifier module is operating in the first operation mode,
the source voltage is configured to be fixed when the power amplifier module is operating in the second operation mode,
the output power level is greater than the first predetermined reference level and equal to or less than a maximum output power level, when the power amplifier module is operating in the first operation mode,
the power amplifier module is configured to operate in a third operation mode,
the source voltage is configured to vary along an envelope of the input signal, when the power amplifier module is operating in the third operation mode, and
the first operation mode, the second operation mode, or the third operation mode is switched based on a modulation method used during transmission, the modulation method including at least one of hybrid phase shift keying (HPSK), quadrature amplitude modulation (QAM), or high speed uplink packet access (HSUPA).
3. 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,
the power amplifier module is configured to switch an operation in a first operation mode and to switch an operation in a second operation mode based on at least a relationship between an output power level of the output signal and a first predetermined reference value,
the source voltage is configured to increase as the output power level of the output signal increases, when the power amplifier module is operating in the first operation mode,
the source voltage is configured to be fixed when the power amplifier module is operating in the second operation mode,
the output power level is greater than the first predetermined reference level and equal to or less than a maximum output power level, when the power amplifier module is operating in the first operation mode,
the power amplifier module is configured to operate in a third operation mode,
the source voltage is configured to vary along an envelope of the input signal, when the power amplifier module is operating in the third operation mode,
the power amplifier module is configured to switch between using two modes including the first operation mode and the second operation mode and using three modes including the first operation mode, the second operation mode, and the third operation mode, based on a modulation method used during transmission, and
the modulation method includes at least one of hybrid phase shift keying (HPSK), quadrature amplitude modulation (QAM), or high speed uplink packet access (HSUPA).