Patent ID: 8093956

Claim:
A temperature-compensated resistance circuit, comprising: a first resistor with a first resistance value (R 1 ); a second resistor with a second resistance value (R 2 ), connected in parallel with the first resistor, wherein the first resistor and the second resistor are both connected to an input-voltage source; and a diode, connected in series with the second resistor, wherein the first resistor and the diode are both connected to a reference-voltage source; wherein the first resistance value and the second resistance value are selected such that a resistance between the input-voltage source and the reference-voltage source has a predetermined temperature coefficient; wherein the first resistance value is a function of temperature, defined approximately by: R 1 =R 10 [1+α 1 ( T−T 01 )], wherein R 10 is a value of the first resistance value at temperature T 01 , α 1 is a temperature coefficient of the first resistor, and T is a temperature of interest; wherein the second resistance value is a function of temperature, defined approximately by: R 2 =R 20 [1+α 2 ( T−T 02 )], wherein R 20 is the value of the second resistance value at temperature T 02 and α 2 is a temperature coefficient of the second resistor.