Boots – shoes – and leggings
Patent
1977-03-04
1978-05-16
Ruggiero, Joseph F.
Boots, shoes, and leggings
73579, 364463, 364508, 73462, G06J 100, G06G 722, G01M 122
Patent
active
040902447
ABSTRACT:
A method for determining a vector component of an oscillation such as an oscillatory signal comprises applying the measured analog oscillatory signal to the calibration voltage input of a multiplying digital-to-analog (D/A) converter, and simultaneously applying a digital reference signal to the digital input of the digital-to-analog converter. The reference signal includes sine or cosine values of an oscillation suitable for the vector component determination and having a frequency corresponding to the frequency of the oscillatory signal to be determined. The analog output of the D/A converter is then further processed to ascertain the desired vector component. The circuit arrangement for practicing this method comprises a multiplying digital-to-analog converter and a binary counter which sequentially addresses a digital memory used to provide the digital reference signals. The binary counter is controlled by a reference signal generator.
REFERENCES:
patent: 3558863 (1971-01-01), Williams, Jr. et al.
patent: 3719813 (1973-03-01), Friedman et al.
patent: 3932740 (1976-01-01), Mueller
patent: 3938394 (1976-02-01), Morrow et al.
patent: 3939715 (1976-02-01), Davis
Fasse W. G.
Firma Carl Schenck AG
Roberts W. W.
Ruggiero Joseph F.
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