Patent ID: 6144233
Filing Date: 2000-11-07
Classification: H03G

Abstract:
A gain control circuit comprising:a first voltage-current linear conversion unit for receiving a gain control voltage and outputting a current which is proportional to the gain control voltage, and which is inversely proportional to a resistivity of a resistance in the gain control circuit;a first temperature characteristic compensation unit for receiving a current obtained by mirroring the current output by said first voltage-current linear conversion unit and for outputting a first current which is proportional to the gain control voltage and a temperature, and which is inversely proportional to the resistivity;a second voltage-current linear conversion unit for receiving a reference voltage and outputting a current which is proportional to the reference voltage, and which is inversely proportional to the resistivity; anda second temperature characteristic compensation unit for receiving a current obtained by mirroring the current output by said second voltage-current linear conversion unit and for outputting a second current which is proportional to the reference voltage, and the temperature, and which is inversely proportional to the resistivity.