Full-Swing Local Bitline SRAM FinFET Technology: A Review

  • Unique Paper ID: 188418
  • PageNo: 1946-1952
  • Abstract:
  • The earlier average-8T static RAM (SRAM) design offers a competitive cell area and eliminates the need for a write-back mechanism. In this architecture, a full-swing local bitline (BL) connected to the read buffer’s gate can normally be produced by applying a boosted wordline (WL) voltage. However, when implemented in more advanced technologies such as a 22-nm FinFET process, where threshold-voltage variation is significant a boosted WL voltage is not feasible because it negatively affects read stability. As a result, the local BL cannot reach a full swing, and the read buffer’s gate is not driven by the full supply voltage (VDD), which leads to a substantial increase in read delay.To address this limitation, this paper introduces a differential SRAM architecture capable of generating a full-swing local BL. This is achieved by incorporating cross-coupled pMOS devices, allowing the read buffer’s gate to be driven by the full VDD without relying on WL boosting. Several multi-bit configurations of the proposed architecture are evaluated with respect to minimum operating voltage and area efficiency. The version storing four bits per block demonstrates a minimum operating voltage of 0.42 V and achieves a read delay reduction by a factor of 62.6 compared to the average-8T SRAM fabricated in 22-nm FinFET technology.

Copyright & License

Copyright © 2026 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{188418,
        author = {shipra garg and Dr. Pragati Sharma},
        title = {Full-Swing Local Bitline SRAM FinFET Technology: A Review},
        journal = {International Journal of Innovative Research in Technology},
        year = {2025},
        volume = {12},
        number = {7},
        pages = {1946-1952},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=188418},
        abstract = {The earlier average-8T static RAM (SRAM) design offers a competitive cell area and eliminates the need for a write-back mechanism. In this architecture, a full-swing local bitline (BL) connected to the read buffer’s gate can normally be produced by applying a boosted wordline (WL) voltage. However, when implemented in more advanced technologies such as a 22-nm FinFET process, where threshold-voltage variation is significant a boosted WL voltage is not feasible because it negatively affects read stability. As a result, the local BL cannot reach a full swing, and the read buffer’s gate is not driven by the full supply voltage (VDD), which leads to a substantial increase in read delay.To address this limitation, this paper introduces a differential SRAM architecture capable of generating a full-swing local BL. This is achieved by incorporating cross-coupled pMOS devices, allowing the read buffer’s gate to be driven by the full VDD without relying on WL boosting. Several multi-bit configurations of the proposed architecture are evaluated with respect to minimum operating voltage and area efficiency. The version storing four bits per block demonstrates a minimum operating voltage of 0.42 V and achieves a read delay reduction by a factor of 62.6 compared to the average-8T SRAM fabricated in 22-nm FinFET technology.},
        keywords = {Bit-interleaving, FinFET, low-voltage operation, static random-access memory (SRAM).},
        month = {December},
        }

Cite This Article

garg, S., & Sharma, D. P. (2025). Full-Swing Local Bitline SRAM FinFET Technology: A Review. International Journal of Innovative Research in Technology (IJIRT), 12(7), 1946–1952.

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