Abstract
This paper proposes low-power voltage-mode/current-mode hybrid circuits to realize an arbitrary two-variable logic function and a full-adder function. The voltage and current mode can be selected for low-power operations at low and high frequency, respectively, according to speed requirement. An nMOS pass transistor network is shared to realize voltage switching and current steering for the voltage- and current-mode operations, respectively, which leads to high utilization of the hardware resources. As a result, when the operating frequency is more than 1.15 GHz, the current mode of the hybrid logic circuit is more power-efficient than the voltage mode. Otherwise, the voltage mode is more power-efficient. The power consumption of the hybrid two-variable logic circuit is lower than that of the conventional two-input look-up table (LUT) using CMOS transmission gates, when the operating frequency is more than 800 MHz. The delay and area of the hybrid two-variable logic circuit are increased by only 7% and 13%, respectively.
Original language | English |
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Pages (from-to) | 1028-1035 |
Number of pages | 8 |
Journal | IEICE Transactions on Electronics |
Volume | E97C |
Issue number | 10 |
DOIs | |
Publication status | Published - 2014 Oct 1 |
Keywords
- Arbitrary two-variable function circuit
- Fine-grain reconfigurable VLSI
- Voltage-mode/current-mode hybrid design
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering