To achieve linear gain control (with a flatness of .+-.1 dB) over a wide range of 70 dB or greater using a single control voltage in a high frequency section of a mobile terminal transmitter, a signal input part 34 and a signal output part 35 are connected by a signal line 51 containing at least two...http://www.google.fr/patents/US6229370?utm_source=gb-gplus-shareBrevet US6229370 - Amplifier
