Digital impedance bridge

Digital impedance bridge

An impedance bridge that compares two-terminal standard inductors to characterized AC resistors in the frequency range of 10 Hz to 100 kHz is described. A dual-channel, digitally-synthesized source and sampling digital multimeter are used to generate and measure relevant bridge signals. A linear int...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 1995-04, Vol.44 (2), p.436-439
Hauptverfasser: Waltrip, B.C., Oldham, N.M.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Bridges
Capacitors
Dielectric measurements
Electronics
Exact sciences and technology
Frequency
Impedance
Inductors
Interpolation
Resistors
Sampling methods
Signal generators
Testing, measurement, noise and reliability
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Beschreibung
Zusammenfassung:An impedance bridge that compares two-terminal standard inductors to characterized AC resistors in the frequency range of 10 Hz to 100 kHz is described. A dual-channel, digitally-synthesized source and sampling digital multimeter are used to generate and measure relevant bridge signals. A linear interpolation algorithm is used to autocalibrate the bridge to a 1 nF gas dielectric capacitor. An intercomparison of the new bridge with existing measurement standards conducted in the low audio frequency range shows agreement of 50 to 200 parts in 10/sup 6/ for inductors for 1 mH to 10 H.< >
ISSN:0018-9456
1557-9662
DOI:10.1109/19.377873