Patent ID: 7843231

Claim:
A temperature-compensated voltage comparator, comprising: a first input terminal and a second input terminal for receiving, for comparison, a first input voltage and a second input voltage, respectively; a first bipolar junction transistor and a second bipolar junction transistor for converting the first input voltage and the second input voltage to a first input current and a second input current, respectively, wherein the first input current and the second input current are dependent upon temperature; a temperature-compensating circuit for generating a logarithmic temperature-compensating factor, wherein the logarithmic temperature-compensating factor compensates, at least in part, for temperature dependency of the first input current and the second input current, the temperature-compensating circuit including: an input for receiving the second input current, and an output for outputting a temperature-compensated current, wherein the temperature-compensated current is the second input current multiplied by the logarithmic temperature-compensating factor; and a basic output node for summing the temperature-compensated current and the first input current, wherein a basic output voltage at the basic output node is indicative of a differential between the first input voltage and the second input voltage.