Accession Number : ADD001634

Title :   Tuned Current Probe.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Bronaugh,Edwin L ; Southwick,Roger A

Report Date : 14 Oct 1975

Pagination or Media Count : 7

Abstract : The patent relates to high transfer impedance and hence improved sensitivity achieved in line current measuring apparatus by making the current detecting probe resonant to the frequency of the line conducted signal being measured. The current detecting probes are inductive pick-off coils and resonance is accomplished by means of a variable capacitance circuit connected in parallel with pick-off coils. The parallel resonant circuit drives a high input impedance low output impedance amplifier. A broad band signal measuring system employs multiple probes each of which has a frequency range that covers a portion of the system operating frequency range. The circuit of the highest frequency probe is balanced and uses back-to-back series connected voltage variable capacitance diodes in its variable capacitance circuit.

Descriptors :   *Probes, *Patents, Electric current, Measuring instruments, Tuning

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE