Patent ID: 8253499
Filing Date: 2012-08-28
Classification: H03D,H03L

Abstract:
1. A charge pump for providing an output signal according to a first control signal, a second control signal and an inverse reset signal, the charge pump comprising: a first current source; a second current source; a first switch having a control terminal triggered by the first control signal and a first terminal coupled to the first current source; a second switch having a control terminal triggered by the second control signal and a first terminal coupled to the second current source; a third switch having a control terminal triggered by an inverse signal of the first control signal and a first terminal coupled to the first current source; a fourth switch having a control terminal triggered by an inverse signal of the second control signal and a first terminal coupled to the second current source; a reset switch having a first terminal coupled to second terminals of the third switch and the fourth switch and a second terminal coupled to second terminals of the first switch and the second switch; an inverse reset switch having a control terminal triggered by the inverse reset signal, a first terminal coupled to the second terminal of the reset switch and a second terminal coupled to an output terminal of the charge pump; and a capacitance having a first terminal coupled to the output terminal of the charge pump and a second terminal coupled to a ground voltage.