Patent ID: 11877082
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. An image sensor, comprising:
a pixel array comprising a plurality of pixel circuits arranged in a matrix, each of the pixel circuits comprising:
an avalanche diode having an anode and a cathode, the anode being connected to a negative bias voltage;
a resistive transistor, a drain of the resistive transistor connected to the cathode of the avalanche diode, and a gate of the resistive transistor configured to receive a fixed voltage signal;
a first switch transistor, a drain of the first switch transistor connected to a source of the resistive transistor, a gate of the first switch transistor configured to receive an exposure signal, and a source of the first switch transistor connected to a system voltage;
a pull up transistor, a gate of the pull up transistor connected to the cathode of the avalanche diode, and a source of the pull up transistor connected to the system voltage; and
a second switch transistor, a gate of the second switch transistor configured to receive the exposure signal, a source of the second switch transistor connected to a drain of the pull up transistor, and a drain of the second switch transistor configured to generate an output voltage; and

a plurality of readout lines each being coupled to the drain of the second switch transistor of each pixel circuit of one pixel circuit column to output the output voltage.