access icon free High-speed energy efficient process, voltage and temperature tolerant hybrid multi-threshold 4:2 compressor design in CNFET technology

Compressors are fundamental components in multi-operand addition and multiplication hardware. The present study aims to propose several high-speed hybrid designs of 4:2 compressors which are implemented based on multi-threshold logic and transmission gate multiplexers, at low supply voltages. In order to implement these circuits, carbon nanotube field-effect transistors (CNFETs) are utilised. The division of the entire input capacitor network in the third proposed design causes the entire structure operates faster and consumes less power. All designs were simulated with Synopsys HSPICE and CNFET technology in different conditions. Simulation results demonstrate the superiority of the third proposed design with regard to different load and frequency conditions. In addition, it becomes less sensitive to process, voltage and temperature variations compared to other similar capacitive threshold logic circuits. The results indicate the third proposed design outperforms the best reference design in terms of delay and power-delay product by 34 and 25%, respectively. Furthermore, the performance of each design was evaluated in a 8 × 8-bit binary multiplier as a uniform test bench, which confirmed the above results on isolated single 4:2 compressors.

Inspec keywords: carbon nanotube field effect transistors; CMOS logic circuits; logic design; multiplying circuits; low-power electronics; threshold logic; capacitors; logic gates; field effect transistor circuits

Other keywords: temperature tolerant hybrid multithreshold 4:2 compressor design; multithreshold logic; high-speed energy efficient process; transmission gate multiplexers; input capacitor network; entire input capacitor network; binary multiplier; temperature variations; reference design; uniform test bench; capacitive threshold logic circuits; process-voltage-temperature variations; Synopsys HSPICE; multiplication hardware; low supply voltages; frequency conditions; isolated single 4:2 compressors; CNFET technology; power-delay product; multioperand addition; similar capacitive threshold logic circuits; high-speed hybrid designs; carbon nanotube field-effect transistors; size 32.0 nm

Subjects: Digital circuit design, modelling and testing; Logic circuits; Logic and switching circuits; Logic elements; CMOS integrated circuits; Logic design methods

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cds.2019.0105
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content/journals/10.1049/iet-cds.2019.0105
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