Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-04-24
1977-09-27
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307218, 307303, 357 46, 357 51, 179 18FG, 323 9, H03K 112, H01L 2702
Patent
active
040513912
ABSTRACT:
Current-mode OR gates useful, for example, in telephone cross-point switch systems. A current-mode OR gate withdraws an output current of predetermined level at its output terminal whenever an input current of sufficient level is applied to one or more of its plurality of input terminals. Each input terminal is connected to the base electrode of a transistor, having its collector electrode connected to the output terminal and having its emitter electrode connected by a resistor to a common terminal. Each input current will bias the transistor to which base it is applied, into conduction, to cause its collector current to be withdrawn through the output terminal. The total output current is constrained to the predetermined level by sensing the potential across the resistor and, in response to this potential reaching a predetermined value, clamping each of the input terminals receiving current to prevent further increase of the potential across the resistor.
REFERENCES:
patent: 3416043 (1968-12-01), Jorgensen
patent: 3573504 (1971-04-01), Breuer
patent: 3755693 (1973-08-01), Lee
Christoffersen H.
Cohen S.
Davis B. P.
Limberg A. L.
Miller, Jr. Stanley D.
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