Cross-Coupled Gated Tunneling Diodes With Unprecedented PVCRs Enabling Compact SRAM Design—Part II: SRAM Circuit

In Part I of this article, we present a novel device, i.e., a cross-coupled gated tunneling diode (XTD), which exhibits negative differential resistance (NDR) with peak-to-valley current ratios (PVCRs) exceeding 105. In this part of this article, based on the XTD, we introduce a compact static random access memory (SRAM) cell using a one-transistor and two-XTD (1T-2X) design. The layout of the SRAM cell as well as a detailed analysis of the cell behavior and SRAM array performance are presented. In particular, our simulation results show that the 1T-2X SRAM cell can achieve
$70\times $
improvement in standby power with ~
$8\times $
area reduction compared to standard CMOS SRAM.