Optoelectronic receiver circuit with dark current correction function and dark current correction method thereof
Abstract:
The present invention mainly discloses an optoelectronic receiver circuit with dark current correction function, comprising: a transimpedance amplifier (TIA), a first variable resistor, a second variable resistor, a photodiode, a leakage compensation photodiode, at least one first leakage correction photodiode, at least one first switch, at least one second leakage correction photodiode, and at least one second switch. In the present invention, the first switch and the second switch are used for enabling the first leakage correction photodiode and the second leakage correction photodiode when the dark current of the leakage compensation photodiode cannot fully cancel a leakage portion of a photodiode current of the photodiode, such that the leakage portion of the photodiode current can be completely eliminated by the dark current of the leakage compensation photodiode and the dark currents provided by the two leakage correction photodiodes.
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