Power amplification circuit for communications signals, has parallel signal paths containing saturation amplifiers with different power output values operated selectively dependent on required power output

摘要

The amplification circuit has at least two parallel signal paths connected between the circuit input (IN) and the circuit output (OUT), each containing an amplifier (V1,V2,V3) operated in a saturation mode. The amplifiers provide respective power output values (Pout) and are individually activated and de-activated via control signals (s1,s2,s3). Preferably a frequency selective load (L) is used to terminate the amplifier. An Independent claim for an application of the power amplification circuit in a cordless communication system is also included.