Electricity: measuring and testing – Testing and calibrating electric meters
Patent
1990-12-03
1991-10-22
Wieder, Kenneth A.
Electricity: measuring and testing
Testing and calibrating electric meters
324 731, 324158R, 37157101, 37157106, G01R 1132
Patent
active
050598937
ABSTRACT:
A performance board for mounting thereon an IC under test is attached to an analog testing part of an IC tester which includes first and second AC signal generators, a DC voltage generator, a timing signal generator, a digitizer, a precision voltage measurement unit and a test processor. On the performance board there are provided an analog switch, a detector circuit, a band pass filter connected to the output of the second AC signal generator, a band elimination filter connected to the output of the first AC signal generator and a switching circuit. The analog switch outputs a rectangular-wave signal by turning ON and OFF the output DC voltage of the DC voltage operator at the frequency and with the duty ratio of a timing signal from the timing generator. The switching circuit connects the outputs of desired ones of the band pass filter, the band elimination filter, the first AC signal generator, the detector circuit and the analog switch to the inputs of desired ones of the digitizer, the precision voltage meassurement unit and the detector circuit, thereby making desired AC evaluation of the IC tester.
REFERENCES:
patent: 4541065 (1985-09-01), Faulkner et al.
patent: 4637020 (1987-01-01), Schivabeck
patent: 4799008 (1989-01-01), Kannari
patent: 4799175 (1989-01-01), Sano et al.
patent: 4829236 (1989-05-01), Brenardi et al.
patent: 4896282 (1990-01-01), Orwell
patent: 4989155 (1991-01-01), Begin et al.
Hiral Masahisa
Komagata Shigemi
Advantest Corporation
Burns William J.
Wieder Kenneth A.
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