Digital auto balance bridge

Details Digital auto balance bridge Digital auto balance bridge

2007-06-04

2009-11-10

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

With auxiliary means to condition stimulus/response signals

C324S647000

Reexamination Certificate

active

07616008

ABSTRACT:
An AC impedance measurement system is used for measuring the impedance of a DUT. A measured voltage is applied to a first DUT terminal by a first digital to analog converter, the voltage appearing at the second terminal of the DUT is monitored through an analog to digital converter and forced by a second digital to analog converter to a desired negligible value, and a digital controller determines the impedance of the DUT from the measured voltage and the current necessary to force the voltage appearing at the second terminal to the desired negligible value.

REFERENCES:
patent: 5307284 (1994-04-01), Brunfeldt et al.
patent: 2004/0027118 (2004-02-01), Lenz et al.
Efficient Microwave Bias and Testing Using the HP 4142B Modular DC Source/Monitor. Hewlett Packard. Application Note 1205 (Date: At least as early as Aug. 30, 2006.).

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