Electric signal producing system

Details Electric signal producing system Electric signal producing system

1989-04-26

1991-09-03

Williams, Hezron E.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324307, 341155, G01R 2316, G01V 300, H03M 112

Patent

active

050457772

ABSTRACT:
An electric signal producing system according to the present invention comprises known signal generating means for generating a known signal having a predetermined frequency, adding means for adding the known signal to a reception signal to generate a mixture signal, an A/D converter for converting the mixture signal to digital data, and a computer for controlling the A/D converter to oversample the mixture signal by a frequency of twice or more as large as a predetermined sampling frequency and calculating in accordance with the digital data.

REFERENCES:
patent: 3656152 (1972-04-01), Gundersen
patent: 4187466 (1980-02-01), Kasson et al.
patent: 4691162 (1987-09-01), Van Uijen
patent: 4710747 (1987-12-01), Holland
patent: 4725814 (1988-02-01), Pohl
patent: 4740748 (1988-04-01), Rzedzian
patent: 4761634 (1988-08-01), Yamaguchi et al.
patent: 4812846 (1989-03-01), Noro
patent: 4876544 (1989-10-01), Kuraishi
Journal of Magnetic Resonance, 69, 504-507, 1986, "Improvement of DynamicRange by Oversampling" by Delsuc et al.
Electronic Product Design, Mar., 1987, pp. 59-62, "Oversampling to Increase S/N of ADC's" by Tiefenhaler.
Society of Magnetic Resonance in Medicine, 7th Annual Meeting Abstracts, p. 978, "A Method for the Reduction of ADC Quantization Noise" by Itagaki.

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