Patent ID: 9564886
Date: 2017-02-07
CPC Classifications: H02M,H03K

Claim:
1. A circuit for controlling operation voltage, comprising: a voltage boost unit adapted for: if receiving a first signal, performing a voltage boost process so as to output a boosted voltage; and if receiving a second signal, stopping the voltage boost process and maintaining a value of the boosted voltage; a voltage division unit adapted for performing a voltage division process on the boosted voltage so as to output a divided voltage, wherein the voltage division unit comprises a plurality of different voltage division coefficients; a comparison unit adapted for: comparing the divided voltage with a reference voltage; if the divided voltage is lower than the reference voltage, outputting the first signal; and if the divided voltage is higher than the reference voltage, outputting the second signal; a control unit adapted for performing a descending switching operation on at least parts of the plurality of voltage division coefficients until the boosted voltage reaches a target voltage; and an output unit adapted for outputting the boosted voltage.