PURPOSE: To tune a tuning circuit to wider frequency range only in the range of change of a voltage generator, by making multiplication and level shift for a DC voltage from the voltage generator with an operational amplifier, in an electronic tuning receiver having a voltage variable tuning element.

CONSTITUTION: When an output voltage VO of a voltage generator 1 changes in the range of Vmin∼Vmax and tuning voltages required for a tuning section 2 are Vf1∼Vf2, since it is required that voltages of Vf1∼Vf2 can be applied to the tuning section 2 even if a voltage from a voltage generator 1 is fully changed, resistors R1 and R2 of an operational amplifier OP of a circuit means 3 are determined to satisfy the conditions in an equationI, and a current source IO and a resistor RF are selected as Vf1=TORF. Thus, the output V of the operational amplifier OP changes in the relation in equation II when the voltage VO of the voltage generator 1 is changed in the range of Vmin∼Vmax. The value of level shift can be set by changing the resistor RF of the current source.