Boots – shoes – and leggings
Patent
1977-10-19
1979-02-27
Smith, Jerry
Boots, shoes, and leggings
328134, 363 39, 363 44, H03D 306, G06F 1534
Patent
active
041422414
ABSTRACT:
A harmonic insensitive phase sensitive demodulator which converts complex AC waveforms to a DC voltage proportional to the fundamental component at an arbitrary phase with respect to a reference voltage and eliminates, to any desired degree, the effects of harmonics of the reference frequency present in the complex AC waveforms.
REFERENCES:
patent: 3517298 (1970-06-01), Richman
patent: 3699461 (1972-10-01), Huntsinger
patent: 3723890 (1973-03-01), Hutsinger
patent: 3793592 (1974-02-01), Matonak et al.
patent: 3839716 (1974-10-01), Reichnebacher et al.
patent: 3940693 (1976-02-01), Brown
Freilich Arthur
Kalron Avraham
North Atlantic Industries, Inc.
Smith Jerry
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