Embedding binary perceptrons in FPGA to improve area, power and performance

Ankit Wagle, Elham Azari, Sarma Vrudhula

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


For the flexibility of implementing any given Boolean function(s), the FPGA uses re-configurable building blocks called LUTs. The price for this reconfigurability is a large number of registers and multiplexers required to construct the FPGA. While researchers have been working on complex LUT structures to reduce the area and power for several years, most of these implementations come at the cost of performance penalty. This paper demonstrates simultaneous improvement in area, power, and performance in an FPGA by using special logic cells called Threshold Logic Cells (TLCs) (also known as binary perceptrons). The TLCs are capable of implementing a complex threshold function, which if implemented using conventional gates would require several levels of logic gates. The TLCs only require 7 SRAM cells and are significantly faster than the conventional LUTs. The implementation of the proposed FPGA architecture has been done using 28nm FDSOI standard cells and has been evaluated using ISCAS-85, ISCAS-89, and a few large industrial designs. Experiments demonstrate that the proposed architecture can be used to get an average reduction of 18.1% in configuration registers, 18.1% reduction in multiplexer count, 12.3% in Basic Logic Element (BLE) area, 16.3% in BLE power, 5.9% improvement in operating frequency, with a slight reduction in track count, routing area and routing power. The improvements are also demonstrated on the physically designed version of the architecture.

Original languageEnglish (US)
Title of host publication2019 IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2019 - Digest of Technical Papers
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728123509
StatePublished - Nov 2019
Event38th IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2019 - Westin Westminster, United States
Duration: Nov 4 2019Nov 7 2019

Publication series

NameIEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD
ISSN (Print)1092-3152


Conference38th IEEE/ACM International Conference on Computer-Aided Design, ICCAD 2019
Country/TerritoryUnited States
CityWestin Westminster


  • 28nm
  • Digital Perceptron
  • FPGA
  • High Performance
  • Low Area
  • Low Power
  • Reconfigurable
  • Threshold Logic

ASJC Scopus subject areas

  • Software
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design


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