Patent ID: 7292083

Claim:
A comparator circuit with Schmitt trigger hysteresis character comprising: a current source which controls the magnitude of current flow through said comparator circuit, a first logic device which is turned ON by a reference voltage, and which when ON feeds current to said current source, a second logic device which is turned ON by a comparator input voltage, and which when ON allows current to flow to said current source, a first feedback device which is turned ON by a negative comparator output, a first parallel resistor which is connected in parallel to said first feedback device, a second feedback device which is turned ON by a positive comparator output, a second parallel resistor which is connected in parallel to said second feedback device, a first load device which is connected to said first feedback device, and a second load device which is connected to said second feedback device, wherein said first and second parallel resistors are used to provide the differential comparator with switching voltage offsets which result in the Schmitt trigger hysteresis character.