Patent ID: 6788152
Filing Date: 2004-09-07
Classification: H03F,H03G

Abstract:
An amplification circuit for receiving an input current, the amplification circuit comprising:a first amplifier including a current-to-voltage conversion resistor for generating a first voltage signal corresponding to the input current; a second amplifier connected to the first amplifier for amplifying the first voltage signal and generating a second voltage signal; a first gain control circuit connected to the first and second amplifiers for generating a first gain control signal based on the second voltage signal and adjusting the resistance value of the current-to-voltage conversion resistor in accordance with the first gain control signal; and a bias control circuit connected to the first amplifier and the first gain control circuit for generating a bias control signal based on the gain control signal and adjusting the bias current at the output of the first amplifier in accordance with the bias control signal.