Boots – shoes – and leggings
Patent
1984-09-14
1987-07-07
Krass, Errol A.
Boots, shoes, and leggings
340347AD, 340347CC, 364570, 367 67, G06F 702, H03M 106
Patent
active
046791620
ABSTRACT:
The effective range of an analog linear-log converter is extended above the number of output decades over which this converter is reasonably linear to cover several additional decades of log conversion. This is made possible by adding a variable gain amplifier having several decades of switchable gain to the input of the converter. Switching between decades to utilize the added decades of output is controlled by a microcomputer which monitors the output level. This switching restores the signal level of each of the added decades to the same level as that of an earlier decade thus maintaining the same slope accuracy and noise levels of the earlier decades throughout the whole conversion range. The microcomputer also provides slope corrections from a lookup table for each of the different output decades as well as also applying to the output corrections for offsets due to the circuit components. Ambient temperature compensation is also provided following the linear-log converter for increased precision.
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Chamran, deceased Morteza M.
Pisano, Jr. Daniel J.
Grimes Edwin T.
Juffernbruch Daniel W.
Krass Errol A.
Masselle Francis L.
Perkin-Elmer Corp.
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