Patent ID: 6747506
Filing Date: 2004-06-08
Classification: H03L

Abstract:
A charge pump comprising:a first transistor of a first type, a gate of the first transistor to receive a first component of a first differential charge pump control signal; a second transistor of a second type, a source of the second transistor coupled to a drain of the first transistor, and a drain of the second transistor coupled to an output node; a third transistor of the first type, a gate of the third transistor to receive a first component of a second differential charge pump control signal; a fourth transistor of the second type, a source of the fourth transistor coupled to a drain of the third transistor; and a current mirror, an input of the current mirror coupled to a drain of the fourth transistor and an output of the current mirror coupled to the output node, wherein, in response to receipt of the first component of the first differential charge pump control signal in a first state, the first transistor is to steer an amount of current through the second transistor to source substantially the amount of current to the output node, and wherein, in response to receipt of the first component of the second differential charge pump control signal in the first state, the third transistor is to steer the amount of current through the fourth transistor to the input of the current mirror to sink the amount of current from the output node.