Parabolic-wave shaping circuit for focus-correction

Details Parabolic-wave shaping circuit for focus-correction Parabolic-wave shaping circuit for focus-correction

1995-07-21

1997-09-02

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315367, 315395, 348806, G09G 104, H01J 2958

Patent

active

056636172

ABSTRACT:
A parabolic-wave shaping circuit for focus-correction which can output only the necessary part of a parabolic-waveform for focus-correction is constructed so as to clip an output waveform of an output amplifier amplifying a parabolic-wave having a horizontal scanning period for a period of a blanking time of a video signal with a clipping circuit composed of a diode and a variable voltage-regulating resistor for adjusting the clipping level.

REFERENCES:
patent: 4361785 (1982-11-01), Stapleton
patent: 4607288 (1986-08-01), Freyberger
patent: 4701678 (1987-10-01), Blacker et al.
patent: 5359265 (1994-10-01), Kii et al.

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