Patent ID: 6407639
Filing Date: 2002-06-18
Classification: H03F,H03G

Abstract:
A radio frequency device including a power amplifier circuit having an input and an output for radio frequency signals and having terminals for DC power supply, and including a stabilizer circuit for controlling variations of the power of the radio frequency output signal of the power amplifier as a function of variations of a reference voltage, characterized in that the stabilizer circuit is arranged to be equivalent to a resistance called nominal resistance having a predetermined value as a function of a specific isopower curve of the power amplifier and to generate on the DC power supply terminal of said power amplifier a voltage in dependence on the reference voltage and said nominal resistance, so that the power consumption in the power amplifier is in agreement with said reference voltage independently of the real internal resistance of the power amplifier, and so that the same applies to the output power of the power amplifier which is proportional to the power consumption by a substantially fixed efficiency factor.