Patent ID: 7994860

Claim:
An electronic component for high frequency power amplification, comprising: a first transistor which amplifies a high frequency input signal with gain corresponding to a bias control signal and generates a high frequency output signal; a power detector which detects output power of the high frequency output signal; an error amplifier circuit which compares a result of detection by the power detector and an output level indication signal for setting a value of the output power from outside thereby to control the bias control signal; a precharge circuit which controls the bias control signal in such a manner that the output power becomes a fixed value within a range in which the value of the output power becomes small up to such an extent as to be undetectable sufficiently by the power detector; a voltage controller which applies a bias voltage corresponding to the bias control signal to the first transistor; and a compensator including a monitoring transistor formed in the same process specification as the first transistor, the compensator detecting a change in electrical characteristics with a process variation having occurred even in the monitoring transistor in a manner similar to the first transistor and compensating for the bias voltage, based on the detected signal; wherein the first transistor and the monitoring transistor are MIS transistors, and wherein the process variation is indicative of a variation in threshold voltage.