Patent ID: 9160952
Filing Date: 2015-10-13
Classification: H04N

Abstract:
1. A CMOS charge pump circuit, comprising: a reference current, an ground end, and an eleventh transistor set between the reference current and the ground end; a first current steering switch and a second current steering switch, wherein the first current steering switch is coupled with a third transistor, the second current steering switch is coupled with an eighth transistor, and an output voltage is provided on a connected node between the first current steering switch and the second current steering switch; a mirror current generator, wherein the mirror current generator comprises multiple transistors to form two mirror currents of the reference current, comprising a first mirror current IX and a second mirror current IY; the first mirror current IX is supplied to the first current steering switch; the second mirror current IY is supplied to the second current steering switch; and the mirror current generator is set between a supply voltage of the CMOS charge pump circuit and the ground end.