Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-09-04
1992-09-08
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307228, 328178, 328181, 328 35, H03K 500, H03K 408
Patent
active
051461080
ABSTRACT:
A parabolic wave generator in a color television receiver or the like wherein, when the amplitude level of an input sawtooth wave is higher than the center level thereof, squared currents of mutually reverse polarities obtained by squaring the difference current proportional to the difference voltage between the two levels are added to each other at a predetermined rate, so that one side portion of a nonsymmetrical parabolic wave is produced. Meanwhile, when the amplitude level of the input sawtooth wave is lower than the center level thereof, squared currents of mutually reverse polarities obtained by squaring the difference current proportional to the difference voltage between the two levels are added to each other at another predetermined rate to thereby produce the other portion of the parabolic wave. Consequently it becomes possible to generate the two side portions of mutually different waveforms. And a desired nonsymmetrical parabolic wave can be achieved by combining such two side portions with each other through addition of the currents thereof without raising any problem in regard of the discontinuity or level difference that may otherwise be caused in the vicinity of the peak of the parabolic wave.
REFERENCES:
patent: 3757041 (1973-09-01), Thorpe et al.
patent: 4739228 (1988-04-01), Viscardi et al.
Tamura Takahiko
Ueshima Jun
Callahan Timothy P.
Eslinger Lewis H.
Maioli Jay H.
Sony Corporation
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