Transmission unit
AssigneeMurata Manufacturing Co., Ltd.
InventorKiichiro Takenaka
Life of this patent
Estimating the term…
Abstract
A transmission unit includes: a power amplification module that amplifies the power of an input signal and outputs an amplified signal; and a power supply module that supplies a power supply voltage to the power amplification module on the basis of a first control signal corresponding to the band width of the input signal. On the basis of the first control signal, the power supply module varies the power supply voltage in accordance with the amplitude level of the input signal in the case where the band width of the input signal is a first band width and varies the power supply voltage in accordance with the average output power of the power amplification module in the case where the band width of the input signal is a second band width that is larger than the first band width.
Claims17
A transmission unit comprising:
- a power amplification circuit configured to amplify a power of an input signal and to output an amplified signal;
- and
- a power supply circuit comprising:
- a first switching amplifier configured to step up or step down a prescribed voltage;
- and
- a linear amplifier configured to output a power supply voltage, wherein:
- an output of the linear amplifier is electrically connected to an output of the first switching amplifier,
- the power supply circuit is configured to:
- supply the power supply voltage to the power amplification circuit based on a first control signal that corresponds to a band width of the input signal,
- vary the power supply voltage in accordance with an amplitude level of the input signal when the band width of the input signal is a first band width, and
- vary the power supply voltage in accordance with an average output power of the power amplification circuit when the band width of the input signal is a second band width, and
- the second band width is larger than the first band width.
A power supply circuit comprising:
- a first switching amplifier configured to step up or step down a prescribed voltage;
- and
- a linear amplifier configured to output a power supply voltage, wherein:
- an output of the linear amplifier is electrically connected to an output of the first switching amplifier,
- the power supply circuit is configured to:
- supply the power supply voltage to the power amplification circuit based on a first control signal that corresponds to a band width of the input signal,
- vary the power supply voltage in accordance with an amplitude level of the input signal when the band width of the input signal is a first band width, and
- vary the power supply voltage in accordance with an average output power of the power amplification circuit when the band width of the input signal is a second band width, and
- the second band width is larger than the first band width.
Dependencies are inferred from the claim text.