Photosensitive circuit structure and optical device

A photosensitive circuit structure, comprising:

• a photosensitive unit comprising a photodiode and a reset transistor;
• a signal amplification unit comprising an amplification transistor;
• and
• a control unit comprising a control transistor;
• wherein, an input terminal of the reset transistor is electrically connected to a power supply terminal, an output terminal of the reset transistor is electrically connected to a control terminal of the amplification transistor, and a control terminal of the reset transistor is electrically connected to a reset signal terminal;
• an input terminal of the amplification transistor is electrically connected to the power supply terminal, an output terminal of the amplification transistor is electrically connected to an input terminal of the control transistor, and a control terminal of the control transistor is electrically connected to a signal control terminal;
• a drain current of the reset transistor is smaller than a drain current of the amplification transistor, and a drain current of the control transistor is smaller than the drain current of the amplification transistor;
• and
• a carrier mobility of the reset transistor is smaller than a carrier mobility of the amplification transistor, and the carrier mobility of the reset transistor is smaller than a carrier mobility of the control transistor.