Abstract: 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.

Abstract: An apparatus comprising an amplifier and a coupling circuit. The amplifier may be configured to generate an amplified output signal in response to a first input signal and a second input signal. The coupling circuit may be configured to generate the second input signal in response to the first input signal. The coupling circuit may be configured to increase a speed of propagation of the first input signal.