Design of I-V converter circuit with dual compensation structure for infrared receiver chip

An I-V converter circuit was designed by using the infrared communication. The converter circuit contained a transimpedance amplifier and two compensation structures. The DC compensation circuit was used to compensate the DC photocurrent generated by ambient light and prevent the saturation at later stages. The AC compensation circuit was used to improve the AC input impedance and preserve the sensitivity of the signal of interest. The research shows, through the I-V conversion circuit to realize the double compensation, the gain control of the circuit and sensitivity are improved significantly. This circuit is implemented in the 0.6 m BiCMOS process. Operating under 3 V, it achieved a DC photocurrent rejection ranging from 10 nA to 300 A and the gain obtained with 110 dB with a good stability.