Photo-detecting apparatus with multi-reset mechanism

A photo-detecting apparatus, comprising:

• an optical-to-electric converter, having a first output terminal, configured to convert an incident light to an electrical signal;
• a cascode transistor, having a control terminal, a first channel terminal and a second channel terminal, wherein the second channel terminal of the cascode transistor is coupled to the first output terminal of the optical-to-electric converter;
• and
• a reset transistor, having a control terminal, a first channel terminal and a second channel terminal, wherein the first channel terminal of the reset transistor is coupled to a supply voltage and the second channel terminal of the reset transistor is coupled to the first channel terminal of the cascode transistor,
• wherein the control terminal of the reset transistor is coupled to a reset signal configured to issue, within a subframe and based on a reset frequency, multiple reset signals at multiple corresponding resetting times to the control terminal of the reset transistor, and
• wherein, after each of the multiple reset signals is issued to the control terminal of the reset transistor at a corresponding resetting time of the multiple corresponding resetting times within the subframe, the first channel terminal of the cascode transistor is configured to provide, to a bit-line, a respective settled voltage that represents an integration of the electrical signal converted by the optical-to-electric converter.