Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-08-01
1978-02-14
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 73PC, 324133, G01R 3108, G01R 3128
Patent
active
040741885
ABSTRACT:
Isolation of a wired-OR fault on a printed circuit board is accomplished by first powering up the circuit board, then injecting a short pulse on the common buss and detecting the current flow by use of a ferrite core. The ferrite core is sufficiently small that it can be moved about the circuit board to the terminals of the various components that are connected to the current buss in a wired-OR configuration. The change of inductance created by the magnetic field associated current pulse flowing through the terminal of a component sinking the current creates a ringing effect which is amplified and compared against a reference voltage. The output of the comparator circuit is used to create a fault alarm signal.
REFERENCES:
patent: 2651021 (1953-09-01), Hays
patent: 2698921 (1955-01-01), Wharton
patent: 3303400 (1967-02-01), Allison
patent: 3437928 (1969-04-01), Baker et al.
patent: 3543154 (1970-11-01), Gordon
patent: 3617879 (1971-11-01), Mugnier
patent: 3619775 (1971-11-01), Naylor et al.
patent: 3621384 (1971-11-01), Yamada
patent: 3742351 (1973-06-01), Palmer et al.
patent: 3753089 (1973-08-01), Gunn et al.
patent: 3828256 (1974-08-01), Liu
patent: 3919631 (1975-11-01), Brown
patent: 3992663 (1976-11-01), Seddick
Czechlewski et al. Pulse and Level Detector Circuit Western Electric Technical Digest No. 35 Jul. 1974 pp. 11-13.
Boatman Roger M.
Hall Melvin R.
Strecker Gerard R.
Testline Instruments, Inc.
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