AC level calibration apparatus

Details AC level calibration apparatus AC level calibration apparatus

1987-04-07

1989-01-17

Karlsen, Ernest F.

Electricity: measuring and testing

Plural, automatically sequential tests

324 74, 324130, 371 27, G01R 3128, G01R 3500

Patent

active

047990082

ABSTRACT:
In an analog test system for testing integrated circuit chips, AC level calibration is achieved by adding a minimal number of new elements and more fully utilizing elements existing in the system. A reference voltage from an existing precision DC power source is fed to an analog switching device. A control signal is also fed into the analog switching device from an existing digital signal generator. Based on the control signal, the analog switching device converts the reference voltage into a rectangular waveform signal, which is then digitized. The digital signal is analyzed, and data from the digital signal is compared with reference data, and the AC level error, if any, is determined. AC level calibration is based on this error.

REFERENCES:
patent: 4340856 (1982-07-01), Orlandi
patent: 4637020 (1987-01-01), Schinabeck
"Etalonnage d'un calibrateur de haute precision" Electronique Industrielle, No. 78, Nov. 1984 pp. 51-56.

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