Patent ID: 7139537
Filing Date: 2006-11-21
Classification: H03G,H04B,H04W

Abstract:
1. A transmission output circuit comprising: gain control amplification means for varying gain of an input signal in accordance with a gain control signal; power amplification means for amplifying power of an output signal from said gain control amplification means; transmission power output level instruction means for specifying a target transmission power output level; transmission power control data generation means for generating the gain control signal for performing a feed forward control of said gain control amplification means in order that an output signal level of said power amplification means becomes said target transmission power output level; detection means for obtaining detected signal data by detecting the output signal of said power amplification means; and judgment means for judging existence of occurrence of trouble in a transmission output system by determining whether said detected signal data from said detection means or said gain control signal are within a determined range, wherein said feed forward control is a closed loop control based on a transmission power control data form a transmission side; and wherein said judgment means judges the existence of occurrence of trouble by determining whether present gain control signal is within a data range assumed relative to said present detecting signal data obtained from said detection means.