Quenching bias circuit device and single photon detector comprising the same

Abstract

Disclosed herein is a quenching bias circuit device capable of operating without a time difference even in a variance in single photon avalanche diode (SPAD). The quenching bias circuit device includes: a light receiving element; a feedback current mirror circuit arranged between a supply voltage and the light receiving element and configured to induce a passive quenching operation so as to maintain a current flowing in the light receiving element to be constant; and a bias quenching circuit connected to a sensing node of the light receiving element and configured to perform an active quenching operation.

Dependencies are inferred from the claim text.