Patent ID: 8331503

Claim:
A receiving level control apparatus, comprising: an amplifier configured to receive a signal and to amplify the signal based on a gain control signal; a memory configured to store an accumulated level of the amplified signal at every sampling period; and a gain control section configured to judge whether or not the accumulated level, which has been accumulated from a first time instant, exceeds a first reference value at a predetermined timing, and to control the gain control signal for the amplifier in response to a length of a time period defined from the first time instant up to a second time instant in a case that the accumulated level exceeds the first reference value, the second time instant defined as a time instant when the gain control section judges that the accumulated level exceeds the first reference value, wherein the gain control section counts a total number of situations that the accumulated level exceeds the first reference value in judgments of the accumulated level; and wherein when the total number becomes equal to or greater than a predetermined number, the gain control section changes the gain control signal for the amplifier.