Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Patent
1993-08-19
1994-03-01
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Parameter related to the reproduction or fidelity of a...
324607, 324603, 324605, 324 7638, 324 7621, 324 7624, 341110, 341120, 341123, G06F 1100, H03K 1302
Patent
active
052911403
ABSTRACT:
Aliasing and synchronization difficulties in determining transfer functions in mixed domain (analog and digital) systems are overcome by sampling the analog signal at a higher sampling frequency that the digital signal, and zero filling the set of sampled digital data (if necessary) so that the sampled digital data corresponds to the more densely sampled analog data. By so doing, a single fixed frequency anti-alias filter in the analog channel can be used to avoid aliasing problems in mixed domain measurements over any span of frequencies, up to the entire passband of the filter. The invention is particularly illustrated with reference to measurements both across digital-to-analog boundaries and across analog-to-digital boundaries.
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HP 3563A Operating Manual, Control Systems Analyzer, vol. I, Hewlett-Packard Company, Feb., 1990, pp. 14-10-14-18.
Hewlett--Packard Company
Solis Jose M.
Wieder Kenneth A.
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