Sawtooth waveform generator for a convergence correction circuit

Details Sawtooth waveform generator for a convergence correction circuit Sawtooth waveform generator for a convergence correction circuit

1990-12-10

1993-07-06

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307261, 307263, 307264, 307271, 307491, 328 35, 328127, 328181, H03K 408, H03L 700

Patent

active

052257142

ABSTRACT:
Electric charges are stored on a capacitor and then the charges are discharged so that a sawtooth wave for use in a convergence correction circuit for a display or the like is generated. When the sawtooth wave is used for a multi-scan display, the charge period is varied according as the scanning frequency varies, and as a result, a phase error is produced in the parabolic wave obtained by squaring the sawtooth wave. To eliminate the phase error, it is adapted such that the discharging current from the capacitor is passed through a coil and, in addition, the period as the reciprocal of the resonant frequency of the resonance circuit formed of the coil and the capacitor is set to be virtually double the discharge period.

REFERENCES:
patent: 2728857 (1955-12-01), Sziklai
patent: 2771556 (1953-12-01), Anderson et al.
patent: 2862171 (1958-11-01), Freeborn
patent: 2896115 (1959-07-01), Guggi
patent: 3539825 (1970-11-01), Hardaway
patent: 3564428 (1968-02-01), Demark
patent: 3586874 (1971-06-01), Ferro
patent: 3659141 (1972-04-01), Kubala
patent: 3725679 (1973-04-01), Darrow
patent: 3763478 (1973-10-01), Yoshizawa et al.
patent: 3902139 (1975-08-01), Harrel
patent: 4139301 (1979-02-01), Chaborski
patent: 4216392 (1980-08-01), Valkestijn
patent: 4329599 (1982-05-01), Gregorian et al.
patent: 4359649 (1982-11-01), Mundel
patent: 4760319 (1988-07-01), Janz
patent: 4809838 (1989-03-01), Houserman
patent: 4835421 (1989-05-01), Khoury et al.

Affiliated with

Also associated with

Rating

Sawtooth waveform generator for a convergence correction 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 Sawtooth waveform generator for a convergence correction circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sawtooth waveform generator for a convergence correction circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1692352