Boots – shoes – and leggings
Patent
1981-07-02
1985-02-05
Shaw, Gareth D.
Boots, shoes, and leggings
364172, 364173, G11B 554, G11B 2110
Patent
active
044981295
ABSTRACT:
Analog servo-positioning signals transduced from a recorded member, such as embedded servo signals recorded on a disc memory or the like, which are to be compared to one another in order to derive an error signal indicative of off-track position deviations, are normalized for accurate responsive positioning changes by use of an analog-to-digital converter referenced by both a positive and a negative summation of the two analog signals and supplied with the individual analog signals as inputs, such that the digitalized output comprises a pair of digital signals, the first representative of the quotient of the first analog signal divided by the summation of the two analog signals, and the second representative of the second analog signal divided by the same summation of analog signals. The two resulting digital signals are then processed in a microprocessor by subtracting the second such quotient-representative signal from the first, thereby providing a fully-normalized digital signal representative of the deviation from true position. An analog multiplexer is preferably used as a switching input to the A/D converter, and the latter comprises a multiplying-type A/D converter.
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Irwin Magnetic Systems, Inc.
Lee Jameson
Shaw Gareth D.
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