Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1976-12-03
1978-02-14
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307237, 307241, 307246, 307254, 307296A, 358190, H03K 102
Patent
active
040741478
ABSTRACT:
Picture quality in a cathode ray tube image display system is improved by a switching amplifier providing output pulses with fast rise and fall times. First and second switching signals are applied as base drive voltages to first and second transistorized differential amplifiers having one transistor of each amplifier with a common collector electrode connection. The interconnection of the collector electrodes forms a summing junction coupled to an output transistor connected in a common base configuration. In series with the output transistor and a power supply is a load resistor that, in conjunction with the output transistor, establishes an output voltage dependent on the sum of the currents generated by the first and second differential amplifiers. Also connected to the output transistor is a clamping network comprising a diode biased at a first voltage level that is lower than the voltage level of the power supply connected to the load resistor. The clamping network limits the voltage level of the output pulses applied to the cathode ray tube. Coupled to the second differential amplifier is a differentiator that generates a current spike that is summed at the summing junction with the currents of the first and second differential amplifiers.
REFERENCES:
patent: 3609385 (1971-09-01), Berwin
patent: 3800166 (1974-03-01), Keiner
patent: 3919568 (1975-11-01), Minner
patent: 3930170 (1975-12-01), Burens et al.
Heyman John S.
Xerox Corporation
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