Patent ID: 9411045
Filing Date: 2016-08-09
CPC Classification: G01S,H03F

Claim Text:
1. A gain control circuit, comprising: a voltage generation circuit that generates a first voltage that is linearly changed over time, wherein the voltage generation circuit includes a capacitor one end of which is connected between an input section and an output section, and a current source that is connected between the input section and the output section so as to be parallel to the capacitor, and wherein the first voltage is output from the output section; a voltage square circuit that outputs a second voltage that is obtained by squaring the first voltage generated by the voltage generation circuit; a resistance circuit that has a resistance characteristic by which a resistance value is squared-changed over time depending on the second voltage output from the voltage square circuit; and a gain adjustment circuit in which gain is squared-changed over time depending on the resistance value of the resistance circuit.