• Proceedings of the KIEE Conference
• /
• 2003.11b
• /
• pp.79-82
• /
• 2003

This paper describes a new low-swing inverter for low power consumption. To reduce a power consumption, an output voltage swing is in the range from 0 to $V_{ref}-V_{TH}$, where $V_{ref}=V_{DD}-nV_{TH}$. This can be done by the inverter structure that allow a full swing or a swing on its input terminal without leakage current. Using this low-swing voltage technology, we propose a low-power $4\times4$ bit parallel multiplier. The proposed circuits are simulated with HSPICE under $0.35{\mu}m$ CMOS standard technology. Compare to the previous works, this circuit can reduce the power consumption rate of 11.2% and the power-delay product of 10.3%.

• The KIPS Transactions:PartA
• /
• v.14A no.3 s.107
• /
• pp.147-150
• /
• 2007

This paper describes a new low-swing inverter for low power consumption. To reduce a power consumption, an output voltage swing is in the range from 0 to VDD-2VTH. This can be done by the inverter structure that allow a full swing or a swing on its input terminal without leakage current. Using this low-swing voltage technology, we proposed a low-power 16$\times$16 bit parallel multiplier. The proposed circuits are designed with Samsung 0.35$\mu$m standard CMOS process at a 3.3V supply voltage. The validity and effectiveness are verified through the HSPICE simulation.. Compared to the previous works, this circuit can reduce the power consumption rate of 17.3% and the power-delay product of 16.5%.

• Clean Technology
• /
• v.21 no.4
• /
• pp.217-223
• /
• 2015

In the present study, modelling and optimization of ethanol-n-heptane separation process were performed using pressure-swing distillation. The pressure-swing distillation process optimization was performed to obtain high purity ethanol and high purity n-heptane into a low-high pressure columns configuration and a high-low pressure columns configuration. The results of pressure-swing distillation process simulation and optimization using high-low pressure column configuration showed a reduced total reboiler heat duty at 5.8% which confirmed a more economical energy consumption.

• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.39 no.2
• /
• pp.56-62
• /
• 2002

A new high speed and low voltage swing on-chip BUS using threshold voltage swing driver and dual sense amplifier receiver is proposed. The threshold voltage swing driver reduces the rising time in the bus to 30% of the full CMOS inverter driver and the dual sense amplifier receiver increases twice the throughput. of the conventional reduced-swing buses using sense amplifier receiver. With threshold voltage swing driver and dual sense amplifier receiver combined, approximately 60% speed improvement and 75% power reduction are achieved in the proposed scheme compared to the conventional full CMOS inverter for the on-chip bus.

• Journal of Electrical Engineering and Technology
• /
• v.3 no.1
• /
• pp.29-35
• /
• 2008

With long time setting, zone 3 impedance relays are considered insensitive to power swings, and their operation condition during power swings is seldom analyzed. Instead of ti me-consuming simulation to the swing loci, their operation condition is directly quantified by polynominal functions in this paper to find the critical swing angle and frequency for relay operation under different relay settings and system parameters. It is found: (1) the swing loci are more densely populated inside than outside of the protection region, which corresponds to long residence time and possible relay operations; (2) the relays may be sensitive to load encroac hments and stable power swings with different relay settings and system parameters; (3) the critical swing frequency may be in the range of low-frequency power swings.

• Journal of the Korean Institute of Telematics and Electronics C
• /
• v.36C no.7
• /
• pp.10-16
• /
• 1999

This paper describes a low voltage swing bus driver using FCSR(Feedback Control Swing voltage Reduction) which can control bus swing voltage within a few hundred of mV. It is proposed to reduce power consumption in On-chip interface, especially for MDL(Merged DRAM Logic) architecture wihich has wide and large capacitance bus. FCSR operates on differential signal dual-line bus and on precharged bus with block controlling fuction. We modeled driver and bus to scale driver size automatically when bus environment is variant. We also modeled coupling capacitance noise(crosstalk) of neighborhood lines which operate on odd mode with parallel current source to analysis crosstalk effect in the victim-line according as voltage transition in the aggressor-line and environment in the victim-line. We built a test chip which was designed to swing 600mV in bus, shows 70Mhz operation at 3.3V, using Hyundai 0.8um CMOS technology. FCSR operate with 250Mhz at 3.3V by Hspice simulation.

• Applied Chemistry for Engineering
• /
• v.28 no.3
• /
• pp.332-338
• /
• 2017

The objective of this work was to study the low temperature vacuum adsorption technology applicable to small and medium scale painting plants, which is the main emission source of volatile organic compounds. The low-temperature vacuum swing adsorption (VSA) technology is the way that the adsorbates are removed by reducing pressure at low temperature ($60{\sim}90^{\circ}C$) to compensate disadvantages of the existing thermal swing adsorption (TSA) technology. Commercial activated carbon was used and the absorption and desorption characteristics of toluene, a representative VOCs, were tested on a lab scale. Also based on the lab scale experimental results, a $30m^3min^{-1}$ VSA system was designed and applied to the actual painting factory to assess the applicability of the VSA system in the field. As a result of lab scale experiments, a 2 mm pellet type activated carbon showed higher toluene adsorption capacity than that of using 4 mm pellet type, and was used in a practical scale VSA system. Optimum conditions for desorption experiments were $80{\sim}90^{\circ}C$ and 100 torr. In the practical scale system, the adsorption/desorption cycles were repeated 95 times. As a result, VOCs discharged from the painting factory can be effectively removed upto 98% or more even after repeated adsorption/desorption cycles when using VSA technology indicating potential field applicabilities.

• JSTS:Journal of Semiconductor Technology and Science
• /
• v.9 no.2
• /
• pp.104-109
• /
• 2009

At a lower supply voltage, voltage-mode drivers draw less current than current-mode drivers. In this paper, we newly propose a voltage-mode driver with an additional current path that reduces the output voltage swing without the need for complicated additional circuitry, compared to conventional voltage-mode drivers. The prototype driver is fabriccated in a 0.13-$^{\mu}m$ CMOS technology and used to transmit data streams at the rate of 2.5 Gb/s. Deemphasis is also implemented for the compensation of channel attenuation. With a 1.2-V supply, it dissipates 8.0 mA for a 400-mV output voltage swing.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.51 no.4
• /
• pp.42-48
• /
• 2014

In this paper, we propose a new small swing domino logic that reduces the swing amplitude by using twist-connected PMOS and NMOS transistors. The output swing range of the proposed circuit is adjusted by the size of the twist-connected transistors and the load capacitance. The designed RCA with the proposed circuit technique shows reduction of the power consumption by 37% and PDP performance by 43% compared with the domino CMOS logic.

• Environmental Engineering Research
• /
• v.22 no.2
• /
• pp.169-174
• /
• 2017

Vacuum swing adsorption (VSA) is a promising treatment method for volatile organic compounds (VOCs). This study focuses on a VSA process for regenerating activated carbon spent with VOCs, and then investigates its adsorption capacities. Toluene was selected as the test VOC molecule, and the VSA regeneration experiments results were compared to the thermal swing adsorption process. Cyclic adsorption-desorption experiments were performed using a lab-scale apparatus with commercial activated carbon (Samchully Co.). The VSA regeneration was performed in air (0.5 L/min) at 363.15 K and 13,332 Pa. The comparative results depicted that in terms of VSA regeneration, it was found that after the fifth regeneration, about a 90% regeneration ratio was maintained. These experiments thus confirm that the VSA regeneration process has good recovery while operating at low temperatures (363.15 K) and 13,332 Pa.