Vector ammeter having digital signal processing unit

Details Vector ammeter having digital signal processing unit Vector ammeter having digital signal processing unit

1988-11-30

1990-06-19

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

With auxiliary means to condition stimulus/response signals

324691, 324 99D, 324123C, G01R 2700, G01R 1925

Patent

active

049356925

ABSTRACT:
An improved type of vector impedance measuring instrument is disclosed. The vector impedance is a vector current relative to (or normalized to) a pertinent voltage. A transducer for converting the impedance to corresponding current and voltage includes a digital signal processing unit. The vector value of the current is derived from parameter values set in the digital signal processing unit. This configuration eliminates a conventional vector ratio detector, which conventionally followed the transducer, saves cost, reduces size, and achieves high performance. Also, algorithms implemented in the digital signal processing unit are easily modified for a variety of transfer functins phase compensation, and corrections.

REFERENCES:
patent: 4481464 (1984-11-01), Noguchi et al.
Maeda, An Automatic, Precision 1 MHz Digital LCR Meter, hp Journal, Mar. 74, pp. 2-9.
Hashimoto et al., An Automatic Wide Range Digital LDR Meter, hp Journal, Sep. 76, pp. 9-15.

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