Resistor circuit with reduced temperature coefficient of resistance

摘要

A resistor circuit includes a pair of linear conductive films and a resistive film. The resistive film is formed on an area between the conductive films and electrically connected to the conductive films. A pair of terminals are electrically connected to portions of the conductive films respectively. A current source is electrically connected between the terminals to deliver an electrical current thereto. A pair of voltage output terminals are electrically connected to portions of the conductive films respectively. At least one of the voltage output terminals is disposed at a portion of the conductive films other than a portion at which the terminals are formed. An output voltage from the voltage output terminals is exactly proportional to a current flowing between them independent of changes in an ambient temperature. The circuit may be implemented in an integrated circuit environment using, e.g., multiple thin film resistors.