Pulse differentiating high voltage shutdown circuit

Details Pulse differentiating high voltage shutdown circuit Pulse differentiating high voltage shutdown circuit

1976-06-01

1977-09-06

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, H01J 2970

Patent

active

040470784

ABSTRACT:
A television receiver includes a conventional tri-color cathode ray tube display system having horizontal and vertical scansion systems. Conventional signal receiving and processing circuitry recovers picture, sound and scansion synchronizing information. A high voltage detector includes a high pass filter, couples to the horizontal scansion amplifier, differentiating the horizontal retrace pulse to detect both amplitude and duration changes therein. A diode rectifies the derivative signal which is then filtered to produce a high voltage error signal. A PNP, NPN transistor pair configured to form a switch analogous to a silicon controlled rectifier responds to a detected excess of high voltage and loads down the operating supply to the horizontal scansion oscillator to terminate high voltage generation. The transistor pair accommodates a degenerating network to better reject false triggering.

REFERENCES:
patent: B422156 (1976-03-01), Yasumatsuya et al.
patent: 3885201 (1975-05-01), Fernsler

Affiliated with

Also associated with

Rating

Pulse differentiating high voltage shutdown circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pulse differentiating high voltage shutdown circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse differentiating high voltage shutdown circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2164868