A CMOS MEMBERSHIP FUNCTION CIRCUIT EMPLOYING SINGLE CURRENT DIFFERENCING BUFFERED AMPLIFIER


TOKMAKÇI M. , ALÇI M.

INFORMACIJE MIDEM-JOURNAL OF MICROELECTRONICS ELECTRONIC COMPONENTS AND MATERIALS, cilt.38, ss.140-143, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 38 Konu: 2
  • Basım Tarihi: 2008
  • Dergi Adı: INFORMACIJE MIDEM-JOURNAL OF MICROELECTRONICS ELECTRONIC COMPONENTS AND MATERIALS
  • Sayfa Sayıları: ss.140-143

Özet

The author proposes a new fully integrable Membership Function Circuit (MFC) using a Current Differencing Buffered Amplifier (CDBA) which employs two second generation current conveyor (CCII) and a voltage buffer. This MFC achieves basic membership functions such as trapezoidal, triangle, S-shape, and Z-shape. The characteristics (width, height, and position) of the implemented MFC are easily adjusted by varying left and right voltages and bias currents. Since the proposed MFC is implemented with a single CDBA block with simple structure, it can be capable of high-speed operation and integrated as a circuit to cover small area of a chip. The behaviour of the proposed MFC has been verified by PSPICE using the model parameters with 0.5 mm MIETEC CMOS process. The proposed MFC is voltage-input current-output and CMOS based structure with low supply voltages (+/- 1.5V), Therefore, it is suitable for both current-mode and low-voltage fuzzy and neural hardware.