Boots – shoes – and leggings
Patent
1995-05-04
1996-09-10
Ramirez, Ellis B.
Boots, shoes, and leggings
364483, 364481, 361 85, 361 86, 363 45, 363 46, 363 39, 307 87, 307 80, G01R 2500
Patent
active
055551823
ABSTRACT:
A digital signal processor implemented monitoring circuit for detecting phase and magnitude disruptions in multi-phase alternating current input signals. A phase lock loop receives multi-phase alternating current input signals and provides one set of alternating current output signals in phase with a time average of the multi-phase alternating current input signals and provides a second set of alternating current output signals phase shifted in relation to the first set of output signals. In a three phase system the phase lock loop provides six alternating current signals. A demodulation circuit multiplies the first set of output signals from the phase lock loop circuit with the multi-phase input signals to produce demodulated sets of signals. An output circuit coupled to the demodulation circuit sums the first set of demodulated signals to provide a first source quality signal. The second set of demodulated signals is also summed to provide a second source quality signal. By comparing the first and second source quality signals with predetermined quality thresholds the output circuit produces a source quality indication.
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Cyberex, Inc.
Ramirez Ellis B.
Wachsman Hal D.
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