HEATER POWER CONTROL CIRCUIT AND BURN-IN APPARATUS USING THE SAME

摘要

A heater power control circuit controls heater power by switching a voltage signal supplied from a direct current power supply and controlling a voltage applied on a heater. In the heater power control circuit, a voltage smoothing circuit for smoothing the a voltage signal provided by switching the voltage and for converting the voltage signal into an analog voltage signal is provided between a switching circuit, which switches the voltage supplied from the direct current power supply, and the heater.