Patent ID: 7279959
Filing Date: 2007-10-09
Classification: H02M

Abstract:
1. A charge pump system, comprising: a charge pump having an input for receiving a first clock signal to be boosted in voltage to a target voltage; a first latch comparator having a first input coupled to the charge pump, a second input coupled to a reference voltage terminal, an output, and a clock input for receiving a second clock signal having a first phase; a second latch comparator having a first input coupled to the charge pump, a second input coupled to the reference voltage terminal, an output, and a clock input for receiving a third clock signal having a second phase that differs from the first phase; and a leading edge detector coupled to both the output of the first latch comparator and the output of the second latch comparator, the leading edge detector providing an enable signal to the charge pump in response to successively and alternately detecting first occurring same-type edges of the outputs of the first latch comparator and the second latch comparator.