Using multiple-valued logic provides more information transmission over a signal line. So it could solve the binary logic circuits problems such as interconnections requirement. In this paper, a universal method for designing ternary 3-2 and 4-2 compressor cells based on carbon nanotube field-effect transistors (CNTFETs) is presented. The proposed circuits use unique properties of CNTFETs, such as adjustable threshold voltage by changing CNT diameter and ballistic carrier transportation. In both designs transmission gates, ternary decoder and standard ternary buffers with different threshold voltages are used. The proposed compressors receive three (for 3-2 compressor) or four (for 4-2 compressor) ternary digits, produce the summation of these digits and show the results in two ternary digits (Sum, Carry). For evaluation and simulation the proposed circuits, Synopsys HSPICE simulator with 32 nm compact model is used in different simulation conditions.
['Sepehr Tabrizchi', 'Hojjat Sharifi', 'Fazel Sharifi', 'Keivan Navi']
A Novel Design Approach for Ternary Compressor Cells Based on CNTFETs