Patent ID: 6952126
Filing Date: 2005-10-04
Classification: H03L

Abstract:
1. A charge pump comprising: a charge pump core circuit including a first transistor having a first source, a first drain, and a first gate to which a reference voltage is applied and a second transistor having a second source jointly connected to a source of the first transistor, a second gate to which a control voltage is applied, and a second drain to which a power supply voltage is applied; a feedback network configured to determine a voltage bias using a first voltage output from an output terminal of a replica bias circuit and a second voltage output from the charge pump core circuit, wherein the replica bias circuit is a replica of the charge pump core circuit and the voltage bias is fed back from the feedback network to the replica bias circuit and the charge pump core circuit to equalize the first voltage output and the second voltage output: a current source connected between a common source of the first and second transistors and a ground; and the output terminal formed at a point responsive to the first and second transistors for forming a charging and discharging path of a capacitor.