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Open Access Nano Express

Small-area and compact CMOS emulator circuit for CMOS/nanoscale memristor co-design

SangHak Shin1, Jun-Myung Choi1, Seongik Cho2 and Kyeong-Sik Min1*

Author Affiliations

1 School of Electrical Engineering, Kookmin University, Seoul 136-702, Korea

2 Division of Electronics and Information Engineering, Chonbuk National University, Jeonju 561-756, Korea

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Nanoscale Research Letters 2013, 8:454  doi:10.1186/1556-276X-8-454

Published: 1 November 2013

Abstract

In this paper, a CMOS emulator circuit that can reproduce nanoscale memristive behavior is proposed. The proposed emulator circuit can mimic the pinched hysteresis loops of nanoscale memristor memory's current-voltage relationship without using any resistor array, complicated circuit blocks, etc. that may occupy very large layout area. Instead of using a resistor array, other complicated circuit blocks, etc., the proposed emulator circuit can describe the nanoscale memristor's current-voltage relationship using a simple voltage-controlled resistor, where its resistance can be programmed by the stored voltage at the state variable capacitor. Comparing the layout area between the previous emulator circuit and the proposed one, the layout area of the proposed emulator circuit is estimated to be 32 times smaller than the previous emulator circuit. The proposed CMOS emulator circuit of nanoscale memristor memory will be very useful in developing hybrid circuits of CMOS/nanoscale memristor memory.