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AssigneeRenesas Technology Corp.
InventorsKyoichi Takahashi, Takayuki Tsutsui, Hitoshi Akamine, Fuminori Morisawa, Nobuhiro Matsudaira
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This invention provides an electronic part for high frequency power amplification (RF power module) which will automatically perform the precharge level setting for proper output power at start of transmission without requiring the software process for precharging to run on the baseband IC, which can reduce the burden on users, namely, mobile phone manufacturers. Such electronic part configured to amplify RF transmit signals includes an output power control circuit which supplies an output power control voltage to a bias control circuit in a high frequency power amplifier circuit, based on an output power level directive signal. This electronic part is equipped with a precharge circuit which raises the output power control voltage to produce a predetermined level of output power, while detecting a current flowing through a final-stage power amplifying element, triggered by rise of a supply voltage at start of transmission.
An electronic part for high frequency power amplification to amplify RF transmit signals, comprising a power amplifying element, a bias control circuit which applies a bias to the power amplifying element, an output power control circuit which supplies an output power control voltage to said bias control circuit, based on an output power level directive signal,
Dependencies are inferred from the claim text.