Floating memristor emulator
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMuhammad Taher Abuelma'atti, Zainulabideen Jamal Khalifa
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Abstract
The floating memristor emulator is based on a circuit implementation that uses grounded capacitors and CFOAs in addition to combinations of diodes and resistors to provide the required nonlinearity and time constants. This circuit results in low power consumption, cost reduction and ease of implementation because it avoids the use of multipliers, ADCs and RDACs. The present circuit is used in an FM demodulator, which exploits the frequency-dependence of the memristance. Successful use in the FM demodulator confirmed the functionality of the present floating memristor emulator circuit.
Claims16
A floating memristor emulator, comprising:
- first, second, third, and fourth current feedback operational amplifiers (CFOAs), each of the CFOAs having y, x, z, and w terminals, the y terminal of the first CFOA being connected to the z terminal of the second CFOA, the y terminal of the third CFOA being connected to the z terminal of the fourth CFOA, and the x terminals of the first and third CFOAs being in operable communication with each other;
- grounded capacitors C1 and C3 connected to the respective z terminal of CFOAs one and three;
- grounded capacitors C2 and C4 connected to the respective x terminal of CFOAs two and four;
- a differential voltage input, vinp, vinn formed from the y terminals of the first and third CFOAs;
- a potentiometer R5 having first and second end terminals and a wiper, the first terminal being connected to the y terminal of the fourth CFOA, the second terminal being connected to the y terminal of the second CFOA, and the wiper being connected to ground;
- a first parallel resistor-diode combination R3 and D1 connected in series with the first terminal of the potentiometer R5 and having a cathode portion of the diode D1 connected to the w terminal of the first CFOA;
- and
- a second parallel resistor-diode combination R2 and D2 connected in series with the second terminal of the potentiometer R5 and having an anode portion of the diode D2 connected to the w terminal of the third CFOA.
Dependencies are inferred from the claim text.