Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-03-07
1976-05-25
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307238, 328151, H03K 520
Patent
active
039596672
ABSTRACT:
A signal voltage level sensing circuit particularly well adapted for use in a static overcurrent trip device. An operational amplifier is utilized to sense the difference between a signal voltage and a predetermined reference voltage while another operational amplifier is the memory element. Minimum duration of input signal to which the memory element responds is established by a resistor and a capacitor in conjunction with the threshhold of the memory element.
REFERENCES:
patent: 3454787 (1969-07-01), Gelernter
patent: 3460000 (1969-08-01), Kiffmeyer
patent: 3743950 (1973-07-01), Sellari, Jr. et al.
patent: 3749944 (1973-07-01), Luebrecht
Allis-Chalmers Corporation
Jones Robert C.
Zazworsky John
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