Patent ID: 7956667

Claim:
A power supply voltage apparatus that supplies a power supply voltage to to a high frequency power amplifier based on input data, the apparatus comprising: a digital offset adding section that receives first offset data and input data, and performs digital addition of the first offset data to the input data to output a first signal; a first digital-to-analog converter that receives the first signal and performs digital-to-analog conversion of the first signal; a level adjusting section that receives the first signal subjected to analog conversion in the first digital-to-analog converter and a second signal comprising an output level control value for controlling an output level of the high frequency power amplifier, the level adjusting section performing adjustment of a level of the first signal to output an adjusted level signal, the level being adjusted based on the output level control value for controlling the output level of the high frequency power amplifier; a second digital-to-analog converter that performs digital-to-analog conversion of the first offset data; an analog offset adding section that receives the first offset data subjected to analog conversion in the second digital-to-analog converter, and performs analog addition of the first offset data, subjected to analog conversion, to the adjusted level signal; and a selecting section that selects between a first addition selecting mode for performing addition in the analog offset adding section and a second addition selecting mode for performing addition in the digital offset adding section, the selection being based on the output level control value.