Patent ID: 8098062

Claim:
A system, comprising: a comparator, comprising: input transistors comprising first and second input transistors coupled to receive differential outputs, and first and second current-mirror loads coupled to said input transistors in a cross coupled configuration to provide hysteresis, said first and second current-mirror loads providing differential drive currents, wherein said first current-mirror load is coupled to a collector of said first input transistor and said second current-mirror load is coupled to a collector of said second input transistor; and first and second emitter degeneration resistors coupled to emitters of the first and second input transistors, respectively, wherein the cross coupling comprising the first current-mirror load coupled to the second emitter degeneration resistor and the second current-mirror load coupled to the first emitter degeneration resistor to provide hysteresis; and a current regulator coupled to the comparator, comprising a matching resistor that is coupled to a regulated supply voltage and a third current mirror coupled to the matching resistor, wherein the third current mirror is coupled to provide bias current for the comparator.