Natural binary to logarithmic binary conversion device with mean

Details Natural binary to logarithmic binary conversion device with mean Natural binary to logarithmic binary conversion device with mean

1976-01-30

1977-12-06

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

235310, H03K 1324

Patent

active

040620140

ABSTRACT:
In practice it is often desirable to represent only a given, selectable dynamic range of a measuring signal, preferably in logarithmic form. This is achieved in accordance with the invention in that from the measured value in the form of a binary number only the positions corresponding to the desired dynamic range are selected for forming the base number, the weight of the most significant bits having the value "1" being converted into a binary number. The mantissa is derived from the following positions, i.e. independent of the selected dynamic range, so that even when the most significant bit is in the last position, a mantissa comprising the full number of positions is formed. The magnitude of the dynamic range is chosen by omitting the correspondingly more significant positions of the base number formed for the maximum range. The position of the dynamic range can be shifted in that the inputs of the circuits for forming the base number and the mantissa are shifted with respect to the lines supplying the individual positions of the measured value.

REFERENCES:
patent: 3610901 (1971-10-01), Lynch
patent: 3694639 (1972-09-01), Deschenes
patent: 3875344 (1975-04-01), Bogart

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