Patent ID: 6118988
Filing Date: 2000-09-12
Classification: H04W

Abstract:
A transmission power control system, comprising:a transmitter that receives a modulated signal and outputs a transmission power signal based on a gain difference control signal;a power detector that transforms said transmission power signal into a DC voltage;a mobile station modem that outputs a first, second, third and fourth gain control values, respectively, based on the DC voltage; anda gain difference controller that generates said gain difference control signal and applies said gain difference control signal to said transmitter in accordance with said first gain control value and an attenuated signal,wherein said gain difference controller comprises,an attenuator that attenuates said DC voltage based on said third gain control value and outputs said attenuated signal,a comparator that generates a difference between said first gain control value and said attenuated signal, andan adding circuit that generates said gain difference control signal by adding said difference and said fourth gain control value.