Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1978-03-10
1980-06-10
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307359, 307216, 307219, H03K 520, H03K 1932, H03K 1332
Patent
active
042075343
ABSTRACT:
A self-checking pulse density analyzer includes substantially similar first and second threshold detection circuits, each of which have one input connected to receive incoming pulse information to be analyzed, and each of which provide the same binary signal state at a separate output terminal, when the pulse density reaches a predetermined level. Each output terminal is connected to a separate input terminal of a threshold equalizing circuit and to respective inputs of first and second gating circuits. The threshold equalizing circuit is activated by the binary signal from the faster acting threshold detection circuit to speed up the operation of the slower threshold detection circuit and, thus, minimize the difference in operating time betwee the two circuits. These two nearly simultaneous binary indications cause the first gating circuit to operate and, thus, provide a particular binary output signal indicative thereof. When the binary indications are substantially separated in time, or if one does not occur, the second gating circuit is effectuated to indicate a failure of one threshold detection circuit.
REFERENCES:
patent: 3074639 (1963-01-01), Morgan et al.
patent: 3600606 (1971-08-01), Clor
patent: 3803425 (1974-04-01), Carp
patent: 3851259 (1974-11-01), Porawski
patent: 4065721 (1977-12-01), Rabe
patent: 4127813 (1978-11-01), Hiroshima et al.
Cool Leonard R.
GTE Automatic Electric Laboratories Incorporated
Heyman John S.
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