AMPLIFICATION DEVICE WITH AUTOMATIC GAIN CONTROL, AUTOMATIC GAIN CONTROL DEVICE, AND AUTOMATIC GAIN CONTROL METHOD

摘要

Disclosed is an automatic gain control device which can revert to a normal state when a malfunction occurs. The device is provided with: a gain control means which sets a designated gain for a variable gain amplification device, which amplifies an input signal at a designated gain between a minimum gain and a maximum gain and outputs an output signal, so that the signal level of the output signal lies within a predetermined range; and a malfunction detection means which outputs a malfunction detection signal when the occurrence of a malfunction in the gain control means is detected, and resets the gain control means.