Patent ID: 6590443
Filing Date: 2003-07-08
Classification: G05F

Abstract:
A dynamic biasing circuit for providing a wider operating range, the circuit comprising:a comparator that is configured to provide a comparison signal that is in a first state when the operating voltage is greater than the trip point voltage and that is in a second state when the operating voltage is less than the trip point voltage; a first biasing circuit having a first biasing output that is configured to provide a first bias voltage at the first biasing output in response to the comparison signal and the operating voltage, wherein the first bias voltage is proportional to the operating voltage when the comparison signal is in the first state and is proportional to the trip point voltage when the comparison signal is in the second state; and a second biasing circuit having a second biasing output that is configured to provide a second bias voltage at the second biasing output in response to the comparison signal and the operating voltage, wherein the second bias voltage is proportional to a ground of the operating voltage when the comparison signal is in the first state and is proportional to the magnitude of the difference between the operating voltage and the trip point voltage when the comparison signal is in the second state.