A voltage to current conversion switching system includes an input terminal (12) for receiving input signal voltage to be converted to a current; an output terminal (24); a first, positive channel (14) having a first offset amplifier (18) for introducing a positive offset to the input signal; a first voltage to current amplifier (20) responsive to the first offset amplifier; and first switching means (22) responsive to the first voltage to current amplifier to provide a first offset current signal (I₁) to the output terminal; a second, negative channel (16) having a second offset amplifier (26) for introducing a negative offset to the input signal; a second voltage to current amplifier (28) responsive to the second offset amplifier; and second switching means (30) responsive to the second voltage to current amplifier to provide a second equal and opposite offset current signal (I₂) to the output terminal to compensate for the temperature drift and switching current injection in the first and second offset current signals; and drive means (32) for actuating the first and second switch means simultaneously to open and close and periodically combine the first and second offset current signals to produce an output current compensated for temperature drift and switching current injection.