Detection circuit with anti-blooming circuit

摘要

The detection circuit comprises a photodiode connected to a readout circuitry. The photodiode and readout circuitry are connected by means of a transistor arranged to operate as a closed switch when the readout circuitry biases the photodiode in a predefined range and to operate as an open switch in the other cases.

主权项

1. A detection circuit comprising:
a readout circuitry configured to apply a reference voltage on an input terminal, and a photodiode coupled to the input terminal of the readout circuitry to be biased, wherein the photodiode and the input terminal of the readout circuitry are coupled by means of a transistor configured as an anti-blooming circuit and biased to operate as a closed switch when the readout circuitry biases the photodiode in a predefined range and to operate as an open switch in other cases, and wherein a voltage difference between the reference voltage on the input terminal of the readout circuitry and a voltage applied to a command terminal of the transistor causes switching of the transistor between an open switch and a closed switch.