Patent ID: 6160432
Filing Date: 2000-12-12
Classification: H03L

Abstract:
A charge pump comprising:a reference current source;an output node;a first switch having first and second states that is normally in the first state, and hat is configured to achieve a second state upon assertion of a first control signal, wherein he first switch is separated from the output node by at least one transistor;a second switch having first and second states that is normally in the first state, and that is configured to achieve a second state upon assertion of a second control signal, wherein the second switch is separated from the output node by at least one transistor;first and second cascode circuits coupled to the output node;a first current mirror coupled to the reference current source and configured to generate a first mirror current and direct the first mirror current through the first cascode circuit to the output node in response to the first switch achieving the second state; anda second current mirror coupled to the reference current source and configured to generate a second mirror current and direct the second mirror current through the second cascode circuit to the output node in response to the second switch achieving the second state.