| 摘要 |
PURPOSE: A degaussing circuit of an image receiving tube is provided to maintain a constant 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 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 a driving signal when the degaussing control signal is input. The insulated gate bipolar transistor provides the alternative current through a posistor to a degaussing coil(Lp).
|
