Switching apparatus with current limiting circuit

Electrical transmission or interconnection systems – Switching systems – Condition responsive

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Details

324 731, 324765, G01R 3126

Patent

active

058805400

ABSTRACT:
A signal switching apparatus performs precise and high speed measurements that indicate DUT breakdown. Several switching circuits having multiple signal switching apparatus provided in parallel with input terminals and output terminals. Each switching circuit is structured to have; (a) A first switch circuit which inputs the guard signal together with the low current measurement signal; (b) a current limiting circuit connected to a stress signal terminal on the input; (c) a second switch circuit connected on the input to the output of the current limiting circuit, having a guard terminal connected to the output of the first switch circuit; (d) A guarded line, one end of which is connected to the output terminals, and the other end of which is connected to the first switch circuit and the output of second switch circuit.

REFERENCES:
patent: 4215309 (1980-07-01), Frey
patent: 4637020 (1987-01-01), Schinabeck
patent: 4661791 (1987-04-01), Wakasugi et al.
patent: 4818934 (1989-04-01), Tamamura
patent: 5414352 (1995-05-01), Tanase
patent: 5644115 (1997-07-01), Knauer

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