High speed flyback circuit for magnetic yoke

Details High speed flyback circuit for magnetic yoke High speed flyback circuit for magnetic yoke

1985-06-17

1987-06-30

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315403, 315396, 315406, H01J 2970

Patent

active

046773525

ABSTRACT:
A deflection drive circuit (15) for an inductive yoke (11) used with a raster scanned cathode ray tube rapidly interrupts current then reverses voltage applied to the yoke (11) during flyback. MOSFETs (Q32, Q47) are used to control current flow to the yoke. The current is interrupted by one MOSFET (Q32) being gated "OFF", after which current is permitted to flow to a capacitor (C51). At a preselected time, a second MOSFET (Q47) is gated on to admit reverse flow of current from the capacitor (C51) to the yoke (11). The second MOSFET (Q47) is gated "ON" by a circuit which includes a third MOSFET (Q57) and a pulse transformer (T59).
Advantages include an ability to rapidly effect flyback without interfering with the forward scanning ability of the deflection drive circuit 15.

REFERENCES:
patent: 3751706 (1973-08-01), Owens, Jr. et al.
patent: 3917977 (1975-11-01), Izumisawa
patent: 3979641 (1976-09-01), Arakawa et al.
patent: 4164689 (1979-08-01), Zappala
patent: 4297621 (1981-10-01), Spilsbury
patent: 4361785 (1982-11-01), Stapleton
patent: 4400652 (1983-08-01), Sunderland
patent: 4456856 (1984-06-01), Klinger
patent: 4556825 (1985-12-01), Thomas
patent: 4581564 (1986-04-01), Gassler
Siliconix, MOSPOWER Design Catalog Jan. 1983.

Affiliated with

Also associated with

Rating

High speed flyback circuit for magnetic yoke does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High speed flyback circuit for magnetic yoke, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High speed flyback circuit for magnetic yoke will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-449735