American Neuralogix, Inc.

American Neurologix, Inc.

Charles D Watson

Paul M Basehore

An arrangement (apparatus and method) using fuzzy logic controls a plurality of devices in response to inputs. The time-division-multiplexed input signals are demultiplexed and fuzzified according to predetermined fuzzy sets. Each crisp input is fuzzified by determining the distance of the crisp input from a center of the membership function of the fuzzy set and linearly complementing the result with respect to the width of the membership function, thereby eliminating the necessity for determining the shape of the membership function. The center may be a fixed value or a 'floating' input. The fuzzified input signals are input to an asynchronous multipath feedforward network which determines a minimum rule term for each rule processed. The multipath feedforward network is dedicated to process the fuzzified input signals in parallel and to determine the minimum rule term using a minimum amount of circuitry. A maximum comparator circuit compares the minimum rule term of each rule corresponding to an output in order to determine the rule which provides the optimum output in response to the fuzzified inputs. An output register defuzzifies the output signal, time-division-multiplexes the output signals, provides feedback to the fuzzifier, and outputs the multiplexed output signals to the devices to be controlled. Other features include a timing generator which minimizes cycle times, a timer processor which provides time-variable inputs, and a keyboard controller.

Fuzzy microcontroller

An arrangement (apparatus and method) using fuzzy logic for controlling a plurality of devices in response to inputs. The input signals are sequentially selected and supplied to a fuzzy input processor. The crisp input signal is fuzzified by selected center and width data corresponding to a selected membership function. Each crisp input is fuzzified by determining the distance of the crisp input from the center of the membership function and linearly complementing the result with respect to the width of the membership function, thereby eliminating the necessity for determining the shape of the membership function. The center and width may be fixed or dynamic values. The fuzzified input signals are successively compared in a min-max comparator which determine a minimum rule term for each rule processed. The minimum rule term is compared with a previously stored minimum rule term to determine a maximum among the minimum rule terms. The fuzzy input processor outputs a clock signal whenever a new maximum among the minimal rule terms is determined, and stores the new maximum value. The arrangement also incudes a fuzzy output processor which executes the rule identified by the fuzzy input processor as the optimum rule. A fuzzy memory interface controls the transfer of data for the fuzzy input processor and the fuzzy output processor, thereby optimizing parameter storage.

Expandable fuzzy microcontroller core

A data correlator has a selectable word length for hamming distance measurement. The correlator includes four 32-bit correlators which output a correlation result and a carry signal. The input of the four 32-bit correlators is controlled by a data select circuit, which inputs serial data to each of the four 32-bit correlators in accordance with the selected word length. When the 32-bit length is selected, the data select circuit simultaneously supplies serial data to each of the 32-bit correlators; when the 64-bit length is selected, the data select circuit effectively provides two simultaneously-performing 64-bit correlators; when the 128-bit length is selected, data select circuit streams the serial data through the four 32-bit correlators. A summation circuit preserves the carry-in signal of each 32-bit correlation in order to generate two 64-bit correlation values and one 128-bit correlation value. The data comparator also includes a CPU bus interface for sharing data on a CPU bus and a control register for automatic addressing of internal registers of the data comparator.

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Sanford, FL, United States of America

Charles D Watson