Abstract:

To ensure the high sensitivity of detector, inductive booster circuit design method is proposed. The method uses the switch tube, single inductor, capacitance, resistance to step up for 5 V dc, the VCO（Voltage-Controlled Oscillator) is composed of 555 chip to produce the frequency of the VCO. The computer simulation analysis method is used by Multisim9, the simulation results show that when input is 5 V, output is 160.096 V to keep stable. It solved the problem that the avalanche photo diode needs high dc reverse bias in normal work at the cathode.

Key words: avalanche photo diode (APD), detector, boost circuit, simulation