A CMOS power splitter for 2,45 GHz ISM band RFID reader in 0,18 µm CMOS technology

Identifikacija radio frekvencije (RFID) je jedna od najbrže rastućih tehnologija uporabljiva u gotovo svakom sektoru za pohranu i bežično uzimanje podataka. Trenutni napredak u CMOS tehnologiji pomaže znanstvenicima i tehnolozima smanjiti dimenzije i poboljšati funkcionalnost RFID sklopova. U ovom radu ilustrirana je konstrukcija jednog RF-CMOS razdvajača snage električnog kruga u 0,18 µm Silterra RF-CMOS tehnologiji za 2,45 GHz RFID čitač. Wilkinsonov razdjelnik snage izabran je za predloženi razdvajač snage električnog kruga s induktorima i kondenzatorima na čipu. Predloženi razdvajač snage ostvaruje najveći gubitak zbog umetanja od 10 dB. AWR Microwave Office® koristi se za simulaciju električnog kruga i za određivanje njegovih S-parametara. Za konstruiranje induktora s točnim vrijednostima u 2,45 GHz rabljen je Sonnet® dok je Cadence® rabljen za razmještaj kondenzatora i otpornika.Radio frequency identification (RFID) is one of the most rapidly growing technologies to be utilized in almost every sector for storing and retrieving data wirelessly. Current advancements in CMOS technology help the scientists and technologists to reduce the size and improve the functionalities of the RFID circuits. In this paper, the design of an RF-CMOS power splitter circuit in 0,18 µm Silterra RF-CMOS technology is illustrated for a 2,45 GHz RFID reader. Wilkinson power divider is chosen for the proposed power splitter circuit with on-chip inductors and capacitors. The proposed power splitter achieves a maximum insertion loss of 10 dB. AWR Microwave Office® is used for the simulation of the circuit and for determination of its S-parameters. To design the inductors with accurate values in 2,45 GHz Sonnet® is used whereas Cadence® is used for capacitor and resistor layout

A CMOS power splitter for 2,45 GHz ISM band RFID reader in 0,18 µm CMOS technology

Identifikacija radio frekvencije (RFID) je jedna od najbrže rastućih tehnologija uporabljiva u gotovo svakom sektoru za pohranu i bežično uzimanje podataka. Trenutni napredak u CMOS tehnologiji pomaže znanstvenicima i tehnolozima smanjiti dimenzije i poboljšati funkcionalnost RFID sklopova. U ovom radu ilustrirana je konstrukcija jednog RF-CMOS razdvajača snage električnog kruga u 0,18 µm Silterra RF-CMOS tehnologiji za 2,45 GHz RFID čitač. Wilkinsonov razdjelnik snage izabran je za predloženi razdvajač snage električnog kruga s induktorima i kondenzatorima na čipu. Predloženi razdvajač snage ostvaruje najveći gubitak zbog umetanja od 10 dB. AWR Microwave Office® koristi se za simulaciju električnog kruga i za određivanje njegovih S-parametara. Za konstruiranje induktora s točnim vrijednostima u 2,45 GHz rabljen je Sonnet® dok je Cadence® rabljen za razmještaj kondenzatora i otpornika.Radio frequency identification (RFID) is one of the most rapidly growing technologies to be utilized in almost every sector for storing and retrieving data wirelessly. Current advancements in CMOS technology help the scientists and technologists to reduce the size and improve the functionalities of the RFID circuits. In this paper, the design of an RF-CMOS power splitter circuit in 0,18 µm Silterra RF-CMOS technology is illustrated for a 2,45 GHz RFID reader. Wilkinson power divider is chosen for the proposed power splitter circuit with on-chip inductors and capacitors. The proposed power splitter achieves a maximum insertion loss of 10 dB. AWR Microwave Office® is used for the simulation of the circuit and for determination of its S-parameters. To design the inductors with accurate values in 2,45 GHz Sonnet® is used whereas Cadence® is used for capacitor and resistor layout

Brain mechanisms that underlie the effects of motivational audiovisual stimuli on psychophysiological responses during exercise

Motivational audiovisual stimuli such as music and video have been widely used in the realm of exercise and sport as a means by which to increase situational motivation and enhance performance. The present study addressed the mechanisms that underlie the effects of motivational stimuli on psychophysiological responses and exercise performance. Twenty-two participants completed fatiguing isometric handgrip-squeezing tasks under two experimental conditions (motivational audiovisual condition and neutral audiovisual condition) and a control condition. Electrical activity in the brain and working muscles was analyzed by use of electroencephalography and electromyography, respectively. Participants were asked to squeeze the dynamometer maximally for 30 s. A single-item motivation scale was administered after each squeeze. Results indicated that task performance and situational motivational were superior under the influence of motivational stimuli when compared to the other two conditions (~20% and ~25%, respectively). The motivational stimulus downregulated the predominance of low-frequency waves (theta) in the right frontal regions of the cortex (F8), and upregulated high-frequency waves (beta) in the central areas (C3 and C4). It is suggested that motivational sensory cues serve to readjust electrical activity in the brain; a mechanism by which the detrimental effects of fatigue on the efferent control of working muscles is ameliorated.This research was supported, in part, by grants from the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Techniques of EMG signal analysis: detection, processing, classification and applications

Electromyography (EMG) signals can be used for clinical/biomedical applications, Evolvable Hardware Chip (EHW) development, and modern human computer interaction. EMG signals acquired from muscles require advanced methods for detection, decomposition, processing, and classification. The purpose of this paper is to illustrate the various methodologies and algorithms for EMG signal analysis to provide efficient and effective ways of understanding the signal and its nature. We further point up some of the hardware implementations using EMG focusing on applications related to prosthetic hand control, grasp recognition, and human computer interaction. A comparison study is also given to show performance of various EMG signal analysis methods. This paper provides researchers a good understanding of EMG signal and its analysis procedures. This knowledge will help them develop more powerful, flexible, and efficient applications

Mobile multicast source support in PMIPv6 networks

With the widespread use of multimedia contents via mobile nodes (MNs), IP mobile multicast becomes more important for wireless, mobile, and ubiquitous multimedia applications. Until now, many research efforts have been made to provide IP multicast for the MNs. However, the existing mobile multicast schemes mostly focus on the mobility of receivers based on the host-based mobility solution that requires the MN to participate in the mobility management. Recent work has shown that service connectivity for mobile multicast sources is still a problem and attracts very little concern. With the development of the network-based mobility support protocol, mobile multicast source support schemes in Proxy Mobile IPv6 (PMIPv6) networks are needed urgently. In this paper, we propose a base solution (BS) and also a direct multicast routing scheme (DMRS) for mobile multicast source support in PMIPv6 networks. In the BS, the multicast listener discover (MLD) proxy function is adopted to transmit multicast data through the PMIPv6 tunnel. The DMRS can provide locally optimized traffic flows and avoid inefficient routing present in the BS. We evaluate and compare the performance of the proposed schemes with the Mobile IP bidirectional tunneling (MIP-BT) and Mobile IP remote subscription (MIP-RS) schemes by theoretical analysis and also implement the proposed schemes on the test-bed. The numerical results show that the BS and DMRS outperform the MIP-BT and MIP-RS in terms of signaling cost. Meanwhile, the experimental results verify the feasibility and validity of our proposed schemes. Furthermore, we study the optimal PMIPv6 domain size to reduce the total signaling cost for the proposed schemes

Techniques of RFID systems: Architectures and applications

From its first use in World War II, to differentiate between enemy and friendly aircraft, RFID has come to an era where it is used as an important identification tool, providing added security and conveniences in our daily lives. Its components and features are still being researched and integrated in existing system to create a marketable and potential new system. (1,2)The main purpose Of this article is to highlight and discuss the various RFID system that are being implemented or under development. The advances, approaches and improvements in the designs will be examined and, if possible, compared with one another Recommendations for future study are also outlined. This review serves as a comparative study and reference, beneficial for RFID researchers for future implementation of the technology

AN OVERVIEW OF POWER DISSIPATION AND CONTROL TECHNIQUES IN CMOS TECHNOLOGY

Total power dissipation in CMOS circuits has become a huge challenging in current semiconductor industry due to the leakage current and the leakage power. The exponential growth of both static and dynamic power dissipations in any CMOS process technology option has increased the cost and efficiency of the system. Technology options are used for the execution specifications and usually it depends on the optimisation and the performance constraints over the chip. This article reviews the relevant researches of the source or power dissipation, the mechanism to reduce the dynamic power dissipation as well as static power dissipation and an overview of various circuit techniques to control them. Important device parameters including voltage threshold and switching capacitance impact to the circuit performance in lowering both dynamic and static power dissipation are presented. The demand for the reduction of power dissipation in CMOS technology shall remain a challenging and active area of research for years to come. Thus, this review shall work as a guideline for the researchers who wish to work on power dissipation and control techniques