Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1989-02-23
1990-12-18
Smith, Jerry
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324116, 341131, 364483, 364493, G01R 21133, H02J 314, H03M 120
Patent
active
049789112
ABSTRACT:
An electrical energy analyzer including a computer for monitoring energy consumption and supporting ripple control is provided with improved A/D converter resolution by applying a 1/2 LSB square wave offset signal to the non-inverting input of a differential amplifier for amplifying a current shunt voltage. The amplifier output has limited filtering to allow a 1/2 to 1 LSB random signal to be applied to the measurement signal entering the A/D converter.
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Federal Scientific Corp., "Dithering Increases Dynamic Range and Improves Linearity", FSC-L-569/100, Aug. 24, 1973.
IEEE Trans. on Instrum. and Meas., Turgel, "Digital Wattmeter Using a Sampling Method", vol. IM-23, No. 4, Dec. 1974, pp. 337-341.
Bauer Michael J.
Meldrum John A. D.
Metlikovec Jordon
Perry Phillip J.
White Clive S.
Baker Stephen M.
Oliver J. Nilsen (Australia) Limited
Smith Jerry
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