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IP명 Calibration Quenching Circuit using Charge Pumping Technique with Single-Photon SPAD for PET Application
Category Mixed Application PET
실설계면적 5㎛ X 4㎛ 공급 전압 3.3V
IP유형 Soft IP 동작속도 500MHz
검증단계 Simulation 참여공정 MS350-1802
IP개요 A bias quenching circuit in a CMOS technology integrated with single photon avalanche photodiodes (SPADs) for Geiger mode operation is developed. An improved bias quenching circuit is proposed to improve the performance of the quenching circuit and to reduce the circuit size as well. To maintain a constant quenching time regardless of breakdown voltage variation of SPADs, the calibration circuits is designed with a bias-correcting calibration capacitor and a current mirror circuit to pump a constant current during a measured time period depending the falling rate. The variation of the quenching time improves from 3.0 ns to 0.005 ns using the proposed quenching circuit. This architecture is based on mixed signal circuit of 0.35um CMOS process and the supply voltage is 3.3 V
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