A Readout Circuit of Microchannel Plate Light Detector in 0.13um CMOS Technology The detector is an important part of a rangefinder system. Compared with XDL and ICCD, MCP (Microchannel Plate) is better in various performances and is getting more and more attention. The microchannel plate has a response time of several tens of picoseconds, a spatial resolution of several micrometers, and low power consumption. It is an area array photoelectric conversion device capable of detecting the weakest optical signal. It is an inevitable way to directly integrate MCP with high performance area array readout integrated circuit chip. In this paper, an application specific integrated circuit (ASIC) for MCP single photon detection is proposed. The readout circuit, consisting of 8x8pixel array has been designed and implemented in a 0.13xcexbcm,1.2V, CMOS technology, with an area of 4300 xcexbcmx3800xcexbcm. After post simulation verification, time detection accuracy of the system can reach 50ps, the distance precision can reach 15mm, and the dead time is 7ns, which has wide application value.

An ASIC for Discriminating Single Photon Detector Signal of HighSpeed Quantum Key Distribution System An ASIC is presented in this paper for discriminating signal from single photon detector (SPD) of highspeed quantum key distribution (QKD) system. The circuit is designed in 130 nm CMOS process. It receives and discriminates a small voltage pulse from a SPD, coinciding with a trigger signal and outputs the effective signal to next stage of QKD system. The pulse width of the voltage signal from SPD is less than 400 ps. The circuit mainly consists of bandgap reference, high speed comparator, delay chain and current mode logic (CML) driver. It should operate at a speed of 1.25 GHz. This work integrate all the frontend electronics for SPD into a chip. The area, stray capacitance and power consumption of the whole circuit are reduced. And then the whole receiver of QKD system can be integrated into a chip to improve performance.