Headlines


CMOS fully integrated reconfigurable power amplifier with efficiency enhancement for LTE applications
January 22, 2015
Introduction Modern wireless communication applications, such as fast Internet, video streaming and so on, are governed by different standards and specifications but have at least one common point, i.e. high data rates, and so high linearity requirements. Furthermore, reducing power consumption becomes a major issue in handset wireless transceivers. In these transceivers, special care had to be taken regarding the efficiency of power amplifiers (PAs). Usually, PAs present maximum efficiency at the maximum output power required by the standard of communication used. For lower levels, in the linear region, the efficiency falls dramatically. As recent standards used signals with high peak to average power ratios (PAPRs), handsets transmit at lower and medium level most of the time.

TigerLogic: Roger Rowe Named CFO
January 21, 2015
TigerLogic has appointed Roger Rowe as the company's new Chief Financial Officer. According to a release, Rowe's appointment as CFO completes an executive leadership transition that began in September 2014. He will report to Brad Timchuk, TigerLogic's Chief Executive Officer.

TigerLogic: Roger Rowe Names CFO
January 21, 2015
TigerLogic Corp. recently reported Roger Rowe's appointment as the company's new Chief Financial Officer, effective immediately.

Continental Reports Ward's Best Engines
January 19, 2015
Continental equips seven vehicles in the 2015 Ward's 10 Best Engines awards with powertrain technologies. "Continental is committed to creating quality technologies by working closely with our customers to develop innovative powertrain options that help them deliver the most fuel efficient, safe and fun to drive vehicles," said Kregg Wiggins, senior vice president, powertrain division, North America, in a release. "Congratulations to all of the honorees this year, especially to our customers that made the list; we are proud to partner with you."

Cavendish Kinetics: SmarTune RF MEMS Tuners Reach Milestone
January 19, 2015
Cavendish Kinetics reported that the company's SmarTune RF MEMS tuners have passed 100 billion cycle lifetime testing. "Reliability concerns have been a major adoption hurdle for RF MEMS for tuning, but Cavendish has worked hard to make reliability a non-issue, allowing OEMs to provide better performing smartphones using RF MEMS antenna tuners," said Chris Taylor, Director - RF & Wireless Components, Strategy Analytics. "Most LTE smart phones use antenna tuning to meet OEM's and operators' performance targets across multiple bands, which has been a big challenge. Compared to tuners fabricated in CMOS SOI and GaAs p-HEMT technology, RF MEMS can provide substantially lower insertion loss and higher Q for better antenna performance."

Cayan Taps Harry Hargens as VP of Business Development
January 19, 2015
Cayan has tapped Harry Hargens as the VP of Business Development. According to a release from the Company, Hargens joins Cayan after most recently serving as VeriFone's Director of Channel Programs and Business Development.

NEC Display Introduces 98-Inch UHD Display
January 18, 2015
NEC Display Solutions of America reported the MultiSync X981UHD display, a 98-inch ultra-high-definition (UHD) model with features and functionality to help organizations see their content in a whole new way.

NEC Display Introduces New 98-Inch UHD MODEL
January 18, 2015
NEC Display Solutions of America has rolled out the MultiSync X981UHD display, a 98-inch ultra-high-definition (UHD) model with features and functionality to help organizations see their content in a whole new way.

THE FUTUREPROOF SPEAKER
January 01, 2015
FULL TEXT Obsolescence is one of the most annoying problems in technology: You save up to buy the newest piece of hardware only to have it eclipsed by a newer, shinier version just a few months later. What if our electronics were built to evolve instead?

Case study: optimization of an industrial steam boiler system operation; Report
July 01, 2014
  INTRODUCTION           As one of the major thermal source, boilers consume a large amount of energy in industrial process and daily life. According to the report [Energy and Environmental Analysis, Inc. 2005] published in 2005, in United States, industrial boilers consumed about 37% of all energy(excluding electricity) at industrial facilities, while 28% of all energy was consumed by commercial boilers at commercial facilities. A well operated boiler system with high efficiency is essential for system performance from the energy consumption point of view.           Good news is that the development of advanced control technology makes the application of automatic control in boiler system possible, which was not even new in the 1960s for steam boilers [Hurter 1967]. Nowadays, most of the natural gas or oil fired boilers can operate with the air/fuel ratio controlled to a preset level. The control methods such as cross limiting control, oxygen ([O.sub.2]) trim control [Ronald, 1997], combined with airflow and fuel flow meters facilitate the accurate control of air/fuel ratio thus improve the efficiency and security of boiler operation.       Generally boiler efficiency is the highest at the boiler rated firing rate and decreases significantly as the boiler operated below 50% of its design load [Harrell 1997]. For industrial boilers, achieving optimal partial load operation is still a challenge while maintaining low excess air.


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