Patent ID: 8149059

Claim:
A method of compensating for gain changes in an amplifier circuit, comprising radio-frequency modules and attenuation elements, said method comprising: driving a radio-frequency module with a first temperature-dependent monitoring voltage U HF (T), and an attenuation element with a second temperature-dependent monitoring voltage U VG (T); wherein, the first temperature-dependent monitoring voltage U HF (T) is produced by applying a temperature dependency to an individual monitoring voltage U opt , which is predetermined for a predetermined temperature for a radio-frequency module, to set the optimum operating point of the radio-frequency module; the second temperature-dependent monitoring voltage U VG (T) is produced by applying a temperature dependency to a predetermined monitoring voltage U VG — T for the attenuation element; and the monitoring voltage U VG — T is determined by an iteration method such that the output power of the amplifier circuit reaches a predeterminable level at a constant input power.