| 摘要 |
PURPOSE: A degaussing circuit of an image receiving tube is provided to supply a constant attenuation current to a degaussing coil independently of a current voltage size by using an insulated gate bipolar transistor. CONSTITUTION: A degaussing circuit of an image receiving tube A degaussing circuit of an image receiving tube comprises a degaussing coil(Lp), a micro computer(10), a switching driving device(20), and an insulated gate bipolar transistor(30). The degaussing coil is installed around an image receiving tube. The micro computer generates a degaussing control signal to remove a magnetization of the image receiving tube. The switching driving device outputs an attenuation voltage from a predetermined voltage to a zero voltage during a predetermined time by the degaussing control signal. The insulated gate bipolar transistor provides the attenuation current to a degaussing coil(Lp) during a constant time.
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