Abstract: A circuit is provided for realizing multiple precision resistor elements on an integrated circuit by sensing a reference resistor. The circuit contains a first current source which passes a first current through a reference resistor located either on or off of the integrated circuit to generate a reference voltage. The reference voltage is applied to the inverting input of a precision high gain operational amplifier. A second current source is connected to the drain of a first MOS transistor operating in its ohmic region. The second current source is also connected to the non-inverting input of the high gain operational amplifier. The output of the operational amplifier is electrically connected to the gate of the first and second MOS transistors. In operation, a precision resistance is developed across the second MOS transistor which is equal to or some determinable multiple of the resistance of the reference precision resistor located on or off chip.