Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-11-14
1988-09-13
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307494, 307498, 307529, 358174, 358166, 358183, 328146, 328187, G06G 712, G06G 700, H04N 552, H04N 514
Patent
active
047711922
ABSTRACT:
A digital clip and gain circuit compares an input waveform with a clip level to produce a difference waveform. The difference waveform is shifted by an exponent representing a power of two portion of a gain value, and is then multiplied by a mantissa representing a fractional portion of the gain value. The resulting product is input to a lookup table which provides level shifting and limiting to output a control waveform. A parallel overflow logic circuit processes the difference waveform and the exponent portion of the gain value to determine if the resulting product is out of range. If the resulting product is out of range, the lookup table outputs either a maximum or a minimum value for the control waveform according to the sign of the difference waveform.
REFERENCES:
patent: 3619495 (1971-11-01), Ito et al.
patent: 3673324 (1972-06-01), Ito et al.
patent: 3736377 (1973-05-01), Warren, Jr. et al.
Gray Francis I.
Miller Stanley D.
Phan Trong Quang
The Grass Valley Group Inc.
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