Patent ID: 8975926
Filing Date: 2015-03-10
Classification: H03K

Abstract:
1. A comparator for comparing two input signals and generating an output signal based on the comparison of the input signals, the comparator comprising: a first input transistor arranged to be coupled to one of the input signals; a second input transistor arranged to be coupled to the other one of the input signals; first and second hysteresis transistors coupled between the first input transistor and an output stage of the comparator and between the second input transistor and the output stage of the comparator, respectively, and configured to apply hysteresis to the comparison of the input signals; first and second hysteresis control transistors coupled between the first and second input transistors and the first and second hysteresis transistors, and operable to isolate the hysteresis transistors from the input transistors under control of a hysteresis enable signal; and first and second control transistors for coupling the first and second hysteresis transistors in parallel with a first output stage transistor and a second output stage transistor respectively, based on the hysteresis enable signal.