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Dear Sir/Madam
Due
to the reason that the real world is analogue and more and more
electronical functions are working digital there is an increasing
need for circuits to translate signals from the real world for
the electronic circuits and vice versa. In this newsletter you´ll
find some exiting examples. Enjoy it!
Wolfgang Patelay
Technical Editor, EPN
Digital and Analogue VoIP Chip (Infineon)
Infineon announced what the
company claims to be the world's first single-chip VoIP engine
with integrated codec and analogue telephony interface. Compared
to existing solutions, the Vinetic-Plus reduces the
printed-circuit-board area required for an adapter by at least
30%. In addition to the VoIP processor, complete
subscriber-line-interface (SLIC) functionality is integrated
into the chip, eliminating the separate analogue-interface
circuit or codec required for current chip-based designs.
Click here
USB Power Manager (Linear Technology)
The LTC4085 controller and standalone battery charger features
PowerPath control that provides power to the USB peripheral device
and charges the peripheral's single-cell Li-Ion battery from the USB
VBUS or a wall-adapter power supply. To comply with USB
current-limit specifications, the IC automatically reduces
battery-charge current as the system-load current increases.
Click here
Capacitance Converter (Analog Devices)
A
programmable 14-channel capacitance-to-digital converter, the AD7142
will enable the design of paper-thin contemporary touch controls.
With 14 inputs, the 16-bit AD7142 can be programmed for a variety of
sensor configurations, such as finger-driven scroll bars, 8-way
position sensors, and scroll wheels that drive pop-up menus.
Click here
Monolithic 12-Bit ADC (Atmel)
The AT84AS001TP is a monolithic 12-bit ADC with a clock frequency of
500Msamples/s, effectively allowing system designers to accurately
digitise signals with frequencies up to 250MHz with one device and
in one conversion.
Click here
Magnetic-field measurements hold
the key to reducing dc/dc EMI
Power converters free system
designers from unwieldy constraints, but the devices radiate
unspecified fields that can destroy the signal/noise performance
of sensitive circuits nearby. William J
Bowhers explains in his article in EDN that
magnetic-field measurements hold the key to finding and
correcting these problems.
Click
here
Capacitive touch sensors gain fans
Capacitive proximity sensors embody an old concept
that today's IC technologies promise to deliver. Vendors vie to win
over new markets in the automotive, consumer, and industrial
markets using methods that combine traditional analog with the best
of contemporary digital techniques. A detailed overview is given by
David Marsh, Contributing
Technical Editor in his Cover story in EDN.
Click here
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Tapped inductor, boost regulator
deliver high voltage
When you face the task of
generating a regulated voltage that's higher than the available
power-supply voltage, you may consider a boost regulator.
Although a boost converter can in theory generate almost any
voltage that's higher than its input, practical considerations
limit the output to approximately eight times its applied
voltage. To generate an even higher voltage, consider using a
tapped-inductor boost topology. This Design Idea by
David Ng and Adam Huff from Linear Technology
shows an implementation of a converter that
boosts a 3V input to 100V dc.
Click
here
Novel circuit isolates temperature
sensor from its host
Temperature sensors must sometimes
operate at locations whose return potentials differ considerably
from that of the data-acquisition system's common—that is,
equipotential—ground. In consequence, the temperature sensor's
support circuitry must provide galvanic isolation between the sensor
and its data-acquisition system. Also, the data-acquisition system
seldom provides an isolated source of power for the sensor. The
circuit in the Design Idea by
Alfredo H Saab and Tamer
Mogannam from Maxim
solves both problems by isolating the sensor's signal and power
supply.
Click here
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4| Book of The Month |
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Thick Film Sensors, by M.
Prudenziati (Editor)
The vast expansion of the sensor and actuator field in recent
years has necessitated the creation of a handbook series to
clarify scientific developments. First in the series, Handbook
of Sensors and Actuators, which will examine a broad range of
topics across the discipline, this volume explores thick-film
technology. Three major areas are explored in which thick film
technology contributes as a sensor technology, namely: hybrid
circuits for signal processing (in combination with either
thick-film sensing elements or transducing elements derived from
other technologies), creation of architectural structures (eg.
multilayer structures, integrated chips with chemical sensing
elements, sensor arrays) and transducing elements derived from
thick-film pastes.
Click here
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5| Competition |
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Two Of Elsevier's Latest Titles To
Choose From
UML expert author Dr. Doron
Drusinsky compiled all the latest information on the application
of UML (Universal Modeling Language) statecharts, temporal
logic, automata, and other advanced tools for run-time
monitoring and verification into a 400-page hardbound book: "Modeling
and Verification Using UML Statecharts". This is the first book
that deals specifically with UML-verification techniques.IPv6
(Internet Protocol version 6) is the future of Internet
telephony. In its 384 pages, the paperback title "Voice Over
IPV6" will provide you all the guidance needed to implement IPv6
as a replacement for the currently used IPv4.
Click here
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