Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-04-21
1976-12-14
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328156, 307235P, G06G 728
Patent
active
039978451
ABSTRACT:
A device for modifying an analog electric signal and producing a modified analog electric signal being a pre-selectable non-linear function of the first signal comprises a plurality of amplifiers having individually variable gains. All amplifiers, possibly with exception for one amplifier, have their inputs connected to an input terminal for the signal to be modified through associated threshold circuits having individually variable threshold values, so that each amplifier operates only when the signal to be modified exceeds the threshold value of the associated threshold circuit and then provides an output signal proportional to the portion of the signal to be modified which lies above said threshold value. The output signals of the amplifiers operating at a given instant are combined into a combined signal constituting the desired modified analog signal. The device approximates the desired non-linear function between the original signal and the modified signal with a chain of successive straight line sections having different inclinations. The knee-points between these straight line sections in the approximation are selected by pre-setting the threshold values of the threshold circuits, whereas the inclinations of the straight line sections are selected by pre-setting the gain factors of the various amplifiers.
REFERENCES:
patent: 2831107 (1958-04-01), Raymond et al.
patent: 2899550 (1959-08-01), Meissinger et al.
patent: 3228002 (1966-01-01), Reines
patent: 3736515 (1973-05-01), Kadron et al.
patent: 3757234 (1973-09-01), Ohlson
Heyman John S.
Servo Chem AB
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