Method and device for correcting DTC delay stepping based on voltage and current control

The invention discloses a method and device for correcting DTC delay stepping based on voltage and current control, and the method comprises the steps: enabling N digital time converters in a phase-locked loop circuit to be connected with oscillation in a negative feedback mode through access control, and setting a delay control signal to be closed; taking a reference clock with a known frequency as a timer, performing timing counting on the output of the digital time converter within a preset time length, and obtaining a counter value when delay control is closed after timing is ended; setting the delay control signal to be turned on, and performing timing counting again to obtain a counter value when delay control is turned on; based on the known reference clock period, the obtained two counter values are used for calculating the stepping precision; adjusting the input voltage or current of the digital time converter according to the stepping precision; and when the phase-locked loop circuit works, controll