Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1980-10-06
1982-04-06
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2970, H01J 2972
Patent
active
043238254
ABSTRACT:
An electron beam deflection circuit useful in cathode ray tube displays which employ television scanning principles. The deflection circuit is characterized by transformer coupling between a source of horizontal drive signal and a switching transistor for the horizontal deflection coil. Energy stored in the transformer during the scan and retrace time is utilized during the scanning time to provide base current to the switching transistor. In addition, the transformer has a second primary winding connected in the emitter circuit of the switching transistor in a manner to allow positive feedback. The positive feedback enhances and sustains the base current during scanning time and controls its magnitude. The circuit is advantageous in that it eliminates the need for precise waveshaping circuits at the input to the switching transistor and lowers the power requirements for the circuits which precede the switching transistor.
REFERENCES:
patent: 2747136 (1956-05-01), Werzog
patent: 3404310 (1968-10-01), Williams
patent: 3487260 (1969-12-01), Eberhard
patent: 3764846 (1973-10-01), Gantt et al.
patent: 3767964 (1973-10-01), Varian
patent: 4028598 (1977-06-01), Verbeij
patent: 4115725 (1978-09-01), Washimoto
Chapter 17-"Technical Television", A.U.J. Martin-Prentice Hall, 1962.
Blum Theodore M.
Hubbard Robert R.
Mohawk Data Sciences Corp.
LandOfFree
Deflection system with positive feedback does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Deflection system with positive feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deflection system with positive feedback will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-594767