Circuit resistance adjusting device

Details Circuit resistance adjusting device Circuit resistance adjusting device

1987-06-29

1989-01-17

Shoop, Jr., William M.

Communications: electrical

Continuously variable indicating

With meter reading

307116, 323354, H03M 178

Patent

active

047990430

ABSTRACT:
A circuit resistance adjusting device for producing a combined resistance consisting of a plurality of resistances which are selectively connected by a switching member. The switching member includes a plurality of switching elements and fuses which are respectively connected with the resistances, wherein when a hold signal is applied to the switching member, the fuses are adapted to be fused off. A patterning member sequentially generates a predetermined pattern signal to the switching member on a step-by-step basis when a signal is applied to the patterning member, so that the resistances are respectively connected sequentially. Thus, upon the application of the hold signal, the patterning member is held to generate a pattern signal and the connection of the resistances is fixed by the fused-off of the fuses.

REFERENCES:
patent: 4016483 (1977-04-01), Rudin
patent: 4409555 (1983-10-01), Min et al.
patent: 4412241 (1983-10-01), Nelson
patent: 4414501 (1983-11-01), Bedard et al.
patent: 4484295 (1984-11-01), Bedard et al.
patent: 4502042 (1985-02-01), Wuhrl et al.

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