Patent ID: 8902013
Filing Date: 2014-12-02
Classification: H03F,H03G

Abstract:
1. A dynamic range compression circuit comprising: an attenuator that attenuates a signal at a predetermined node in an amplifier to reduce a gain of the amplifier; and a gain controller that reduces the gain of the amplifier by the attenuator so that an amplitude of an output signal of the amplifier becomes an arbitrary output limit voltage in a case where an input signal having the same amplitude as that of an input-stage maximum voltage of the amplifier is input into the amplifier, and increases the gain of the amplifier by reducing a degree of attenuation of the attenuator according to a decrease of the amplitude of the input signal of the amplifier from the input-stage maximum voltage in a case where the amplitude of the input signal of the amplifier is smaller than the input-stage maximum voltage, wherein the gain of the amplifier increased by the gain controller is limited to a predetermined maximum gain, and wherein after the gain of the amplifier is increased, the gain controller is configured to adjust an amplitude of an input signal of the amplifier corresponding to the predetermined maximum gain.