Data processing: structural design – modeling – simulation – and em – Simulating electronic device or electrical system
Reexamination Certificate
2005-08-02
2005-08-02
Phan, Thai (Department: 2128)
Data processing: structural design, modeling, simulation, and em
Simulating electronic device or electrical system
C702S121000, C341S122000, C341S155000, C327S002000
Reexamination Certificate
active
06925428
ABSTRACT:
A printed wiring board includes an input conditioner having a plurality of analog dc inputs and a plurality of analog dc outputs; a switching circuit having an analog dc output, the switching circuit being connected to the plurality of analog dc outputs of the input conditioner; a sample and hold converter having an analog dc output, the sample and hold converter being connected to the analog dc output of the switching circuit; an A/D converter having a digital output, the A/D converter being connected to the analog dc output of the sample and hold converter; a microprocessor connected to the digital output of the A/D converter; a timer circuit connected to the microprocessor; a random access memory connected to the microprocessor; and a VME interface connected to the microprocessor. The printed wiring board further comprises an ac multiplexer; a plurality of rms to dc converters connected to the ac multiplexer, the rms to dc converters being connected to the switching circuit; a zero crossing detector connected to the ac multiplexer; a phase detector connected to the zero crossing detector and to the microprocessor; a filter connected to one of the outputs of the zero crossing detector; and a frequency measurement circuit connected to the filter and to the microprocessor.
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Phan Thai
The United States of America as represented by the Secretary of
Zimmerman Frederic
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