A BiCMOS Active Quencher Using an Inverter-Based Differential Amplifier in the Comparator
B. Goll,
M. Hofbauer,
H. Zimmermann
Abstract:For fast switching off of a firing single-photon avalanche diode, an active quenching circuit in 0.35 µm BiCMOS technology with a very fast quenching slew rate is introduced. Quenching transients measured at an integrated small prober pad are shown. An NPN transistor as quenching switch leads to an active quenching time of 250 ps and a quenching slew rate of 21.1 V/ns. A self-biased two-inverter differential amplifier used in the comparator makes this fast quenching possible. By the implementation of cascoding… Show more
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