JPH03125585U - - Google Patents

Description

[Brief explanation of drawings]

1 to 4 show one embodiment of the degaussing circuit of the present invention, FIG. 1 is a block diagram, and FIGS. 2 a and b.
is a timing chart for explaining operation, Fig. 3 is a wiring diagram of the main parts when the power switch is turned on, Fig. 4 is a current waveform diagram of the degaussing coil, Figs. 5 to 7 show conventional examples, and Fig. 5 is a block diagram, FIG. 6 is a characteristic diagram of the heat-sensitive resistance element, and FIG. 7 is a current waveform diagram of the degaussing coil. 2: AC power supply, 3: Heat sensitive resistance element, 4: Degaussing coil, 5: Power switch, 10: Timer circuit, 1
1: Switching element for attenuation delay.

Claims (1)

[Claims for Utility Model Registration] A series circuit consisting of a heat-sensitive resistance element with positive temperature characteristics and a degaussing coil is connected to an AC power source by turning on the power switch of the receiver, and the resistance value changes based on the energization of the resistance element and heat generation. In the degaussing circuit that generates an attenuated alternating magnetic field in the coil to demagnetize the color cathode ray tube of the receiver, the operating time is variably set according to the characteristics of the color cathode ray tube, and is activated by turning on the power switch. a timer circuit provided in parallel with the resistive element, the alternating magnetic field of the coil is peaked by short-circuiting the resistive element for the operating time immediately after the power switch is turned on by on/off control based on the output of the timer circuit; A degaussing circuit with a switching element for a decay delay to hold the value.