Patent ID: 6970022
Filing Date: 2005-11-29
Classification: H03K

Abstract:
1. A comparator comprising; an input amplifier including: a first current mirror coupled to the first pair of input transistors and operable to sum a first pair of input amplifier output signals and provide at least a portion of a comparator output signal on a comparator output terminal; a second current mirror coupled to the second pair of input transistors and operable to sum a second pair of input amplifier output signals and provide at least another portion of the comparator output signal on the comparator output terminal; a first hysteresis transistor including a first hysteresis transistor input terminal coupled to the comparator output terminal and operable to supply a first hysteresis current to at least one of the first current mirror and the second current mirror; and a second hysteresis transistor including a second hysteresis transistor input terminal coupled to the comparator output terminal and operable to supply a second hysteresis current to at least one of the first current mirror and the second current mirror.