AUTOMATIC GAIN CONTROL CIRCUIT

PROBLEM TO BE SOLVED: To provide an automatic gain control circuit in which a chip area is comparatively small even when a fixed gain setting function is added in addition to an automatic gain control function. SOLUTION: The present invention relates to an automatic gain control circuit 1 for variably controlling a gain of an amplifier 3 so as to fix an output signal level regardless of a change in an input signal level and the automatic gain control circuit is configured to perform amplitude setting for variably controlling the gain, and fixed gain setting for fixing the gain, while switching them within an integral control circuit 1, respectively. COPYRIGHT: (C)2007,JPO&INPIT