Biasing circuit, control method, chip and electronic equipment

The embodiment of the invention discloses a bias circuit, a control method, a chip and electronic equipment, relates to the technical field of photoelectricity, and solves the problems that in the prior art, the precision of a bias circuit is low, and accurate reverse bias voltage cannot be provided for a single photon avalanche diode so that the single photon avalanche diode can be triggered through a single photon. According to the specific scheme, the biasing circuit is provided and comprises a current detection circuit, a control circuit and a voltage regulation circuit. The current detection circuit is used for detecting the output current of the single photon avalanche diode array and generating a current indication signal. The control circuit is used for generating a voltage regulation signal according to the current indication signal. The voltage regulation circuit is used for providing reverse bias voltage for the single photon avalanche diode array according to the voltage regulation signal.