Patent Number: 6,297,687

Title: Drive control circuit of charged pump circuit

Abstract: A drive control circuit of a charged pump circuit has a power sourcevoltage detecting circuit for detecting a power source voltage, a controlcircuit for changing the number of the drive steps of the charged pumpcircuit in accordance with the detected output of the power source voltagedetecting circuit, and a by-pass circuit for allowing an output at thelast step to be by-passed towards an output side of the drive steps inaccordance with a change in the number of drive steps of the charged pumpcircuit.

Inventors: Sugimura; Naoaki (Tokyo, JP)


International Classification:

Expiration Date: 10/02/2013