Fuzzy membership function generator using resonant tunneling dio

Details Fuzzy membership function generator using resonant tunneling dio Fuzzy membership function generator using resonant tunneling dio

1994-05-19

1996-11-05

Hafiz, Tariq R.

395900, G06G 700

Patent

active

055726267

ABSTRACT:
The folding V-I characteristic of a resonant tunneling diode (RTD) is utilized to generate the multiple membership functions for each antecedent. The folding characteristic of an RTD generally has a triangular shape, which corresponds to the popular membership function functions commonly in use. The amount of overlap of adjacent membership functions can be adjusted by adding or substracting a dc current to or from the RTD characteristic. The use of RTD folding characteristic to generate multiple membership functions can be used in a fuzzifier to simplify circuit implementation. A time varying membership function can be generated by sweeping the RTD with a voltage ramp. This time varying membership function can be used in the defuzzifier to obtain a crisp output.

REFERENCES:
patent: 5247472 (1993-09-01), Nagazumi
patent: 5280445 (1994-01-01), Shieh et al.
Tang et al, "Multi-peak resonant tunneling diodes based defuzzifiers;" Proceedings. The twenty-fourth internatinal symposium on multiple-valued logic, pp. 156-161, 25-27 May 1994.

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