Patent ID: 6657465
Filing Date: 2003-12-02
Classification: H03F,H03L

Abstract:
A charge pump circuit for providing a source current and a sink current, said circuit comprising:a first bipolar transistor responsive to a first input signal, said first input signal causing the first bipolar transistor to conduct; a second bipolar transistor responsive to a second input signal, said second input signal causing the second bipolar transistor to conduct; a plurality of source current bipolar transistors, said plurality of source current bipolar transistors being electrically coupled to the first bipolar transistor and providing the source current in response to the first input signal; a plurality of sink current bipolar transistors, said plurality of sink current bipolar transistors being electrically coupled to the second bipolar transistor and providing the sink current in response to the second input signal; and a voltage divider network including a plurality of resistors, wherein a voltage potential across a first resistor in the voltage divider network when the first bipolar transistor conducts generates the source current and the voltage potential across the first resistor when the second bipolar transistor conducts generates the sink current.