Logic circuit with threshold and built-in safety

Details Logic circuit with threshold and built-in safety Logic circuit with threshold and built-in safety

1984-10-10

1987-06-30

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307200A, 307443, 307355, 307310, H03K 19007

Patent

active

046773169

ABSTRACT:
The invention pertains to a logic circuit with threshold and built-in safety such that any change in the characteristics of its components produces a relative increase of the threshold value. It comprises a comparator (7) one input of which receives a reference d-c voltage (VR) whereas the other input is connected to the junction point of a first and a second resistance (1, 2). A first d-c voltage (V1) of low relative value is applied to the free terminal of the first resistance (1), and a second d-c voltage (V2) of high relative value is applied to the free terminal of the second resistance (2) by means of a third resistance (3). According to the invention, there is applied at the junction point (A) of the second and third resistances (2, 3) a third d-c voltage (V3) of intermediate relative value by means of a fourth resistance (4) in series with a chopping commutator (6).

REFERENCES:
patent: 3995173 (1976-11-01), Sibley
patent: 4125784 (1978-11-01), Harrison
patent: 4130764 (1978-12-01), Darrow
patent: 4549099 (1985-10-01), Yamada et al.

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