Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1975-03-05
1976-11-02
Heyman, John S.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307202R, 307308, 307324, H03K 483, H03K 1772, H02H 900, H03K 3353
Patent
active
039899624
ABSTRACT:
Both source-electrodes (S1 and S2) or both drain-electrodes of a pair of field-effect transistors (FETs) (F1 and F2) of n-channel type and p-channel type, respectively, both to be electrically actuated in a depletion mode are connected to each other, or the source of one FET and the drain of the other FET are connected to each other, through a variable resistance element (F3) inbetween, whereby the pair of FETs (F1 and F3) are series-connected through the variable resistance element (F3) inbetween, the gate-electrode (g1 or g2) of each FET is connected to the drain-electrode (d2 or d1) or the source-electrode of the other FET (F2 or F1) that is not connected to the variable resistance element (F3), and a pair of external terminals (1 and 2) are connected to said gate electrodes (g1, g2) those are connected to said drain electrodes (d2 and d1) or source electrodes.
When a voltage of specified range is applied across both non-series-connected electrodes, i.e., the two external terminals, the resulting voltage-current characteristic presents a so-called dynatron-type characteristic, producing a negative-resistance phenomenon, and a curve of voltage-current characteristic changes responding to the value of control signal to the variable resistance element.
Since this device is a negative resistance of variable characteristic this device can be utilized for switching, signal relaying, memorization and other various controlling or data processing uses.
REFERENCES:
patent: 3369129 (1968-02-01), Wolterman
patent: 3461312 (1969-08-01), Farber et al.
patent: 3603811 (1971-09-01), Day
patent: 3605728 (1971-09-01), Ogle
patent: 3732482 (1973-05-01), Marek
"Unifets as Voltage-Controlled Resistors," published by Siliconix, incorporated, 1963 (7/15/63), 3 pages.
Ostefjells, "Negative Resistance Circuit Using Two Complementary Field Effect Transistors," Proc. of IEEE, vol. 53, No. 4, p. 405; 4/1965.
Hill et al., "Synthesis of Electronic Bistable Circuits," IEEE Trans. On Circuit Theory; pp. 25-35; 3/1963.
Kano Gota
Takagi Hiromitsu
Anagnos Larry N.
Heyman John S.
Matsushita Electronics Corporation
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