CONVERTER CIRCUIT, TUNER AND TELEVISION RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide a miniaturized DC/DC converter circuit for incorporation inside a television tuner or the like and further to provide a convenient tuner with incorporated DC/DC converter. SOLUTION: An RC low-pass filter (LPF) composed of a resistor and a capacitor is connected to the output of the DC/DC converter for supplying a voltage to the varactor of a tuner circuit or oscillation circuit and the voltage is supplied through the RC LPF to the varactor.