Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1980-07-10
1981-12-01
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
358 93, H01J 2970, H01J 2972
Patent
active
043038689
ABSTRACT:
A sawtooth waveform circuit for a cathode ray tube display apparatus or the ike is disclosed for providing a sawtooth waveform signal in synchronization with the uniformly spaced pulses of a sync signal. A direct current voltage is supplied to an integrator which produces a ramp voltage. Switching means responsive to each pulse of the sync signal shorts the integrator so as to cause the ramp voltage to appear at the output of the integrator as a sawtooth waveform signal. A summing amplifier amplifies the sawtooth waveform signal, and then combines the amplified sawtooth waveform signal with a variable direct current voltage generated by a head tracker so as to provide at the output of the summing amplifier a raster drive signal.
REFERENCES:
patent: 3885095 (1975-05-01), Wolfson et al.
Allen John H.
Berke Herbert
Owen Joseph R.
Adams Robert W.
Blum Theodore M.
Kalmbaugh David S.
Sciascia Richard S.
The United States of America as represented by the Secretary of
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