Design of an efficient VCMA controlled spintronic random number generator

Arshid Nisar; Seema Dhull; Brajesh Kumar Kaushik; Farooq Ahmad Khanday

doi:10.1117/12.2567531

20 August 2020 Design of an efficient VCMA controlled spintronic random number generator

Arshid Nisar, Seema Dhull, Brajesh Kumar Kaushik, Farooq Ahmad Khanday

Proceedings Volume 11470, Spintronics XIII; 114703X (2020) https://doi.org/10.1117/12.2567531
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

Random number generators play an essential role in stochastic circuits, neuromorphic computing and cryptographic systems. Existing CMOS based true random number generators (TRNGs) incur a significant performance, power and area overheads. The systems based on magnetic tunnel junctions (MTJs) offer favorable features such as high resilience, low energy consumption, good performance, and less complexity. Compared with the conventional MTJ switching approaches, voltage controlled magnetic anisotropy switching (VCMA) features low switching current, minimal control circuitry and calibration process, and insensitivity to the write pulse duration. In this paper an efficient design for TRNG based on VCMA using MTJ is presented. The proposed magnetic TRNG consists of a standard two-terminal MTJ connected to the drain terminal of a PMOS transistor which controls the pulse width of the applied bias voltage. MTJ is used as a noise source device and its precessional switching characteristics are exploited to design the TRNG. The resistance of the device fluctuates while operating in precessional switching regime and the magnetization state is selected randomly via thermal fluctuations. The voltage developed across the MTJ corresponding to its random state results into a random bit. A 64-bit parallel random number generator has been implemented and evaluated using Spice simulating tool (with 45 nm CMOS technology node). The proposed circuit has an advantage of less circuit complexity and high energy efficiency. It achieves a high throughput of 64Gbps with an energy consumption of 5.6 fJ/bit.

Conference Presentation

Citation Download Citation

Arshid Nisar, Seema Dhull, Brajesh Kumar Kaushik, and Farooq Ahmad Khanday "Design of an efficient VCMA controlled spintronic random number generator", Proc. SPIE 11470, Spintronics XIII, 114703X (20 August 2020); https://doi.org/10.1117/12.2567531

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available