Boots – shoes – and leggings
Patent
1995-10-11
1997-05-27
Ramirez, Ellis B.
Boots, shoes, and leggings
36457101, 36457104, 324600, G01R 2716
Patent
active
056338015
ABSTRACT:
In accordance with the present invention, a pulse-based impedance measurement instrument is provided. A pulse generator repetitively generates a stimulus pulse to a device under test (DUT). A digitizer circuit, consisting of a sample-and-hold circuit, an analog to digital converter, and acquisition memory, repetitively samples the response voltage across the DUT to create a time record of the voltage as a function of time during a pulse response measurement. Each time record is operated on by a Fast Fourier Transform (FFT) which converts the voltage versus time information into voltage versus frequency information in a manner well known in the art. By measuring a set of calibration resistors with known resistance values to generate a set of complex calibration constants, the impedance measurement instrument provides measurements of complex impedance and return loss versus frequency of a DUT.
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Barker Douglas J.
Dam Tuan Q.
Fluke Corporation
Ramirez Ellis B.
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