A low power unified cache architecture providing power and performance flexibility

2002 ◽  
Author(s):  
A. Malik ◽  
B. Moyer ◽  
D. Cermak
Keyword(s):  
Low Power ◽  
Cache Architecture ◽  
And Performance

scholarly journals A Simple Microstrip Phase Shifter

1992 ◽  
Vol 45 (1) ◽  
pp. 105 ◽  
Author(s):  
SW Amy ◽  
MI Large
Keyword(s):  
Low Power ◽  
Phase Shifter ◽  
Narrow Band ◽  
Phase Shifters ◽  
Performance Data ◽  
Frequency Range ◽  
Design Chart ◽  
Binary Phase ◽  
Gain Variation ◽  
And Performance

A novel, inexpensive, series-connected loaded-line (SCOLL) phase shifter has been developed for the Molonglo Observatory Synthesis Telescope. The phase shifter, which operates at 0�843 GHz, consists of a ",3>'/8 length of microstrip with series connected varactors at each end. Although designed as a binary phase shifter, the insertion phase varies almost linearly with varactor reactance, with very little gain variation for phase ranges up to 90�. Thus, driven by a digital-to-analogue (D/ A) converter, a SCOLL becomes a programmable phase shifter of any desired resolution. The same technique would be suitable for narrow-band low power applications in the frequency range 0�1 to 10 GHz. This paper gives the basic theory of SCOLL phase shifters, a design chart, construction details and performance data.

scholarly journals Carrier Transport in High-Mobility III–V Quantum-Well Transistors and Performance Impact for High-Speed Low-Power Logic Applications

2008 ◽  
Vol 29 (10) ◽  
pp. 1094-1097 ◽  
Author(s):  
G. Dewey ◽  
M.K. Hudait ◽  
Kangho Lee ◽  
R. Pillarisetty ◽  
W. Rachmady ◽  
...  
Keyword(s):  
Quantum Well ◽  
Low Power ◽  
High Speed ◽  
Carrier Transport ◽  
High Mobility ◽  
Performance Impact ◽  
And Performance ◽  
Low Power Logic

Chirp Spreading Spectrum in Imperfect Environment and Wireless Tree Topology Network

2021 ◽  
Author(s):  
Hongqiang Li ◽  
Dongyan Zhao ◽  
Xiaoke Tang ◽  
Jie Gan ◽  
Xu Zhao ◽  
...  
Keyword(s):  
Low Power ◽  
Rapid Development ◽  
Single Point ◽  
Multipath Fading ◽  
Tree Topology ◽  
Area Network ◽  
Wide Area Network ◽  
Target Node ◽  
Long Distance ◽  
And Performance

With the rapid development of IoT technology in recent years, higher requirements have been put forward for wireless communication technology. Low Power Wide Area Network (LPWAN) technology is emerging rapidly, the technology is characterized by low power consumption, low bandwidth, long-distance, and a large number of connections, and is specifically designed for Internet of Things applications. LoRa (Low Power Long Range Transceiver), as a typical representative of LPWAN technology, has been widely concerned and studied. This paper analyzes the performance of LoRa modulation in the tree topology network and analyzes the performance of LoRa modulation in the imperfect environment for point-to-point communication and multipoint-to-point communication. From theoretical analysis and performance simulation, it can be seen that the influence of frequency offset or multipath fading on LoRa signal is very obvious. However, when LoRa modulation is used for networking, multi-user interference will be introduced. Under the influence of many imperfect factors, the signal receiver performance of LoRa modulation will be difficult to guarantee. Because of these effects, Coordinated Multiple Points based on Timing Delay (DCoMP) is presented. Multiple nodes close to each other send the same data to the target node. Due to the inaccurate synchronization between nodes, there will be a certain relative delay when sending signals to the same target node. After the receiving node combines the signals of multiple nodes according to different relative delays, the reception performance of the signals can be improved. At the same time, the cooperative node can also actively adjust the signal sending time to improve the reception performance of the receiving node signal merging algorithm. LoRa modulation, by using DCoMP transmission, improves the reception of signals and thus the overall capacity of the system. Through the analysis of multipoint communication and single point communication, this paper is of great help to LoRa network deployment.

scholarly journals Level Converters for Ultra Low Power IoT Applications

2018 ◽  
Vol 7 (2.16) ◽  
pp. 19
Author(s):  
T Yugendra Chary ◽  
S Anitha ◽  
M Alamillo ◽  
Ameet Chavan
Keyword(s):  
Energy Efficiency ◽  
Low Power ◽  
Slight Reduction ◽  
Dramatic Improvement ◽  
Modest Improvement ◽  
Ultra Low Power ◽  
Iot Applications ◽  
Communication Devices ◽  
And Performance ◽  
Level Converter

For efficient ultra-low power IoT applications, working with various communication devices and sensors which operating voltages  from subthreshold to superthreshold levels which requires wide variety of robust level converters for signal interfacing with low power dissipation. This paper proposes two topologies of level converter circuits that offer dramatic improvement in power and performance when compared to the existing level converters that shift signals from sub to super threshold levels for IoT applications. At 250 mV, the first proposed circuit - a modification of a tradition al current mirror level converter - offers the best energy efficiency with approximately seven times less energy consumption per operation than the existing design, but suffers from a slight reduction in performance.  However, a second proposed circuit - based on a two-stage level converter - at the same voltage enhances performance by several orders of magnitude while still maintaining a modest improvement in energy efficiency.  The Energy Delay Products (EDP) of the two proposed designs are equivalent and are approximately four times better than the best existing design.  Consequently, the two circuit options either optimizes power or performance with improved overall EDP.  

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