Tunable membership function circuit for fuzzy control systems using CMOS technology

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Tunable membership function circuit for fuzzy control systems using CMOS technology

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© The Institution of Electrical Engineers
Published

The membership function circuit (MFC) is used in the input parts of analogue fuzzy hardware systems. The fuzzy hardware can execute singleton fuzzy control algorithms. In the letter a voltage-input current-output membership function circuit is proposed. The characteristic of this building block is tunable and is useful for current-mode analogue fuzzy hardware. The proposed circuit was designed by using 3.5μm CMOS design rules, and its operations have been confirmed using PSPICE simulations.

Inspec keywords: CMOS integrated circuits; fuzzy logic; analogue processing circuits; linear integrated circuits; tuning; fuzzy control

Other keywords: membership function circuit; OTA implementation; voltage input current-output; 3.5 micron; PSPICE simulations; fuzzy control; CMOS technology; singleton fuzzy control algorithms; tunable circuit; building block; CMOS design rules; current-mode analogue fuzzy hardware

Subjects: Analogue processing circuits; Electronic control logic; Analogue circuits; CMOS integrated circuits

References

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      • Z. Wang . A CMOS four-quadrant analog multiplier with single-ended voltage outputand improved temperature performance. IEEE J. Solid-State Circuits , 9 , 1293 - 1301
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      • M. Togai , H. Watanabe . Expert system on a chip: an engine for real-time approximate reasoning. IEEE Expert , 56 - 62
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      • M. Banu , Y. Tsividis . Floating voltage-controlled resistors in CMOS technology. Electron. Lett. , 15 , 678 - 679
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      • Togai, M., Chiu, S.: `A fuzzy logic accelerator and a programming environment for real-time fuzzy control', Proc. 2nd Inter. Fuzzy Systems Association Congress, July 1987, p. 147–151.
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