ARLA/CLUSTER : FW: Engenharias e Tecnologias 23, de 21 de Junho

[Miguel Andrade]

-----Mensagem original-----
De: Engenharias&Tecnologias [mailto:engtec  senaeng.com]
Enviada: quarta-feira, 21 de Junho de 2006 15:04
Para: arla  clix.pt
Assunto: Engenharias e Tecnologias 23, de 21 de Junho


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Engenharias & Tecnologias

... a newsletter dedicada as novas tecnologias, electricas e electronicas
Exemplar no22, 21 de Junho de 2006, Subscricao gratuita, copyright 2006

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Contezdo

- Notas do Editor
- Artigos de Interesse
- Novos Componentes
- Eventos
- Ideia de Montagem, circuito experimental
- Emprego!
- Acerca da Engenharias&Tecnologias, subscreva a newsletter!



Notas do Editor


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engtec  senaeng.com.

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directamente.

Melhores cumprimentos,
Antsnio Sirgio Sena, Editor



Artigos de Interesse

# Portugal ja tem 90MW de energia solar em carteira
# Portugueses preparam maior central eslica do mundo
# Poupanga de energia pode atingir os mil milhues
# Consumidores tjm de tomar medidas
# Governo espanhol corta incentivos `s eslicas


RIM 8700 teardown: the power of power integration
The latest Blackberry meets a tough power-management challenge, this
under-the-hood report shows how it was done

HDD camcorder teardown: MEMS, gyros keep things steady
It takes a careful combination of components to make this hard-disk-drive
camcorder meet new challenges; this under-the-hood looks shows how a JVC
unit combined MEMS and gyroscopes to overcome hand "shakes" and drops

On-board communication [read: power] buses see flurry of activity
For yearsso many years, in fact, that the patent license has expiredI2C
was the most commonly used bus for shuttling information around concerning
how things were going on your motherboard. Recently, Philips improved on its
design with a new I2C busthe Fm+ (fast-mode-plus). Shortly thereafter, ADI
and Intel announced the Simple Serial Transfer (SST) Bus, which they claim
is a vast improvement on the old I2C bus.

Nanotech finds a home in memory
With memory bits set to take up the vast majority of tomorrow's
systems-on-chips, new forms of memory technology will be needed to keep
power consumption under control.

Cell phone system aids in parking cars
A small Canadian startup has come up with a sophisticated cell phone-based
application called Easypark, aimed at solving one of the most intractable
urban problems around: inner-city parking.

Bluetooth and MP3: How to optimize battery life and music quality
Bluetooth falls short of the high quality audio that MP3 players deliver
over a wired link. What can be done for a better wireless connection?



Novos Componentes

Oki drives down ZigBee chip active power consumption
At the Zigbee Open House, Oki showed off a single chip Zigbee device that it
claims has half the active power consumption compared to conventional
products.

Way, Way Faster Than a Speeding Bullet
A new IBM silicon germanium chip ultimately may run at 1 terahertz;
real-world testing produces speeds of 500GHz.

CCD image sensor has 111 million pixels
Dalsa Semiconductor has fabricated an image sensor with more than 111
million pixels. The company claimed that the four inch by four inch
charge-coupled device is the world's highest resolution image sensor.

Power and Thermal Management ICs Solutions Bulletin



Eventos

NetSeminar Services: Upcoming NetEvent Broadcasts

Upcoming Conferences & Events



Ideia de Montagem, circuito experimental

Getting the most out of a portable's battery
Battery life is critical to portable applications and can be required to
last more than 10 years. Here are some pros and cons when designing battery
powered devices.

Protected EEPROM Operations
Nonvolatile memory is essential for embedded microcontroller applications.
This application note explains how to use a transaction-based
commit-rollback mechanism to protect the contents of an external EEPROM
memory device.

Selecting a Backup Source for Real-Time Clocks
This alternate supply source allows the RTC to maintain the current time and
date while the main power source is absent. This application note discusses
the various types of alternate supplies that can be used, as well as some of
the criteria a designer should consider when selecting a backup source.

A simple software lowpass filter suits embedded-system applications
Building a digital equivalent of an analog lowpass RC filter requires just a
couple of lines of fixed-point C code.

Power Supply ManagementPrinciples, Problems, and Parts
Determining whether a supply voltage is above a threshold or within an
operating windowand powering supplies on or off in the correct sequence
with respect to each otheris vital for safety, economy, durability, and
proper operation of electronic systems. This article discusses how power
supply designers are using flexible supply  monitoring, sequencing, and
adjustment circuits to manage their systems.



Emprego!

     Fagam-nos chegar as vagas de emprego para as areas de Engenharia
Elictrica e/ou Electrsnica, que faremos por as publicar.



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