Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1982-10-19
1985-05-21
Miller, S. D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307494, 328 26, H03K 522, G06G 712
Patent
active
045188777
ABSTRACT:
Bipolar inputs are afforded by the plus inputs of first and second differential input amplifiers. A first gain determining resister is connected between the minus inputs of the differential amplifiers. First and second diodes are connected between the respective minus inputs and the respective outputs of the differential amplifiers. First and second FETs have their gates connected to the outputs of the amplifiers, while their respective source and drain circuits are connected between the respective minus inputs and an output lead extending to a load resister. The output current through the load resister is proportional to the absolute value of the input voltage difference between the bipolar input terminals. A third differential amplifier has its plus input terminal connected to the load resister. A second gain determining resister is connected between the minus input of the third differential amplifier and a voltage source. A third FET has its gate connected to the output of the third amplifier. The source and drain circuit of the third transistor is connected between the minus input of the third amplifier and a voltage-frequency converter, constituting an output device. A polarity detector is also provided, comprising a pair of transistors having their inputs connected to the outputs of the first and second differential amplifiers. The outputs of the polarity detector are connected to gates which switch the output of the voltage-frequency converter between up and down counting outputs.
REFERENCES:
patent: 3736515 (1973-05-01), Kadron et al.
patent: 3851259 (1974-11-01), Porawski
"A Precision Programmable Bipolar V/f Instrumentation Module", DOE Technical Report No. LBL-13417, Lawrence Berkeley Laboratory, University of California, Oct. 21-23, 1981 at the Nuclear Science Symposium.
Electronic Design Notes, Jerald Graeme, 1/20/75, pp. 45-47.
Hearn William E.
Rondeau Donald J.
Clouse, Jr. Clifton E.
Davis B. P.
Gaither Roger S.
Hightower Judson R.
Miller S. D.
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