Patent ID: 9696737
Date: 2017-07-04
CPC Classifications: G05F,H02H,H02M

Claim:
1. A surge current compensating circuit, for compensating a surge current drawn from a supply power after an output signal of a specific circuit transits, comprising: a compensating current generation unit, electrically coupled to an output stage of the specific circuit, for drawing a compensating current from the supply power according to the output signal, wherein the compensating current substantially equals to the surge current, and a summation of a current flowing through the output stage of the specific circuit and the compensating current is substantially unchanged regardless whether the output signal transits or not; and a bias unit, electrically coupled to the compensating current generation unit, for providing a bias to the compensating current generation unit to receive the compensating current passed through the compensating current generation unit or output the compensating current to the compensating current generation unit.