Weighing scales – Computer – Electrical
Patent
1996-09-24
1997-08-12
Gellner, Michael L.
Weighing scales
Computer
Electrical
177 2518, G01G 1922, G01G 1300
Patent
active
056568002
ABSTRACT:
In order to increase both the weighing accuracy and the weighing speed of a weighing apparatus, a delta.multidot.sigma analog-to-digital converter (4) having a cut-off frequency higher than that of an analog filter (3) is connected with the output of the analog filter (3). Also, in order to perform a quick drift correction of an amplifier (2), the analog filter (3) is selectively switchable so as to perform a filtering function during a weighing mode and to perform a buffering function during a correction mode correcting means (52) is provided for storing the digital signal from the delta.multidot.sigma analog-to-digital converter (4) as a drift signal (df) during the correction mode and for providing a corrected digital weight signal (d2) by subtracting the drift signal (dr) from the digital weight signal (d1) obtained from the delta.multidot.sigma-type analog-to-digital converter (4) during the weighing mode.
REFERENCES:
patent: 4836310 (1989-06-01), Yamano
patent: 4846291 (1989-07-01), Osawa et al.
patent: 4853881 (1989-08-01), Yamada
DeFreitas, Richard, "The Low Cost Way to Send Digital Data" Electronic Design Jan. 18, 1974, pp. 68-73.
Krentes, Rodney, "Delta Modulation: The Forgotten AID Converter" Modern Electronics May 1987, pp. 20-22 and 89.
Elbit-Ati, Ltd. WO 93/07679, Apr. 15, 1993.
M. Byrne et al., "Kleinste Signale--prazise gemessen," Elektronik, vol. 41, No. 4, Feb. 18, 1992, pp. 44-53.
F. Goodenough, "Grab distributed sensor data with 16-bit delta-sigma ADCs," Electronic Design, vol. 36, No. 9, Apr. 14, 1988, pp. 49-56.
M. Rebeschini et al., "A 16-bit 160 KHZ CMOS Converter Using Sigma-Delta Modulation," IEEE 1989 Custom Integrated Circuit Conference, May 15-18, 1989, pp. 611-615.
Itoh Kouji
Naito Kazufumi
Gellner Michael L.
Gibson Randy W.
Ishida Co. Ltd.
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