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Components/New Products

New product information as well as design tips about passive devices and other components such as LEDs, LCDs, switches, sensors, cables, connectors, and motors.
Top Story
Top Story

PCB-layout techniques for gigasample ADCs 11/12/2009

When a multilayer board operates at speeds greater than a few hundred megahertz, it's a challenge to maintain signals without mismatches, losses, distortion, or EMI. Follow these guidelines for PCB layout to preserve signal integrity and achieve high-speed performance.

News

Voices: Leveling the playing field for small hardware start-ups 10/22/2009

Chumby designer Andrew Huang is among the first of a new breed of small-hardware-system entrepreneurs using China's electronics supply chain.

Cadence links FPGA-pin allocation to PCB-layout tools 10/8/2009

Co-design solution speeds designing FPGAs onto PCB systems.

High hot/cold factor boosts HB-LED efficacy 10/8/2009

Philips’ new Luxeon Rebel HB LEDs (high-brightness light-emitting diodes) have a 0.93 hot/cold factor—the ratio of junction temperatures at 100 and 25°C.

Touch sensors allow for variations in parasitic capacitance 6/23/2009

Capacitive-touch sensors can detect a finger touch by measuring capacitive changes on the touch pad.

Ramtron expands serial-FRAM line with 32-kbit device 6/19/2009

Ramtron International Corp, a supplier of nonvolatile FRAM (ferroelectric random-access memory), has announced the FM24CL32, a serial-nonvolatile RAM that offers high-speed read/write performance, low-voltage operation, and long-term data retention.
In-Depth

In search of a better DRAM: evolving to floating bodies 9/17/2009

Widely investigated floating-body memories appear to be compelling replacements for conventional DRAMs. A new floating-body memory uses the intrinsic bipolar transistor to store significantly greater charge.

Thermal design guidelines for solid-state lighting applications using LEDs 9/11/2009

Here are six critical steps necessary to developing a successful, cost-effective thermal design for an LED application. Two families of LED applications have been used to illustrate many of the design choices that are open to the thermal designer to satisfy these application issues.

Ambient-light sensors pack in features to help applications get smarter, greener 8/6/2009

Ambient-light sensors help smartphones conserve display power and improve battery runtime. Newer versions combine improved features, such as spectral response and dynamic range, integrated proximity, and digital communications. These features are readying the sensors for use in large-screen and automotive displays and solid-state lighting.

Applications and considerations of capacitive proximity sensing 6/19/2009

Capacitive proximity sensing is a clever way to interact with user interfaces without having to physically touch the interface controls. It is based on the principles of capacitive sensing, which detect the presence or absence of a conductive object.

Filter-feedthrough-failure flash 5/14/2009

Tales From The Cube: A trip to Indonesia helps one engineer solve the case of a high rate of feedthrough failures.
Experts

Voices: Leveling the playing field for small hardware start-ups 10/22/2009

Chumby designer Andrew Huang is among the first of a new breed of small-hardware-system entrepreneurs using China's electronics supply chain.

For 10G interconnects, the RJ45 once again will dominate 5/5/2009

GUEST OPINION: 10GBASE-T will be adopted as the primary 10GE interconnect for data-center switches and servers for many of the same reasons that RJ45 and twisted-pair cabling already dominate at gigabit speeds.

Know your ceramic capacitor, part two 11/27/2008

Class II and Class III ceramic capacitor advantages, liabilities, and application considerations.

All about surface-mount ferrites 8/21/2008

You may be surprised to learn that the performance of a ferrite bead in any power-filtering application can vary by more than a factor of 10, depending on the magnitude of dc current passing through the part during actual operation.

Voices: Harley Feldberg: the pulse of the industry 3/20/2008

Voices: EDN speaks with Avnet's Harley Feldberg about the economic situation, the growing role of Avnet in the design community, and the changing role of Asia in the industry.
DesignIdeas

Negative-to-negative switch-mode converter offers high current and high efficiency 11/12/2009

Don't let variations in input voltage affect the output voltage.

ADC for programmable logic uses one capacitor 11/12/2009

Use a capacitor's charging and discharging time to sense a user input.

Use two phases to cut current and improve EMI 11/12/2009

A two-phase SEPIC has lower output-capacitor current, which also improves reliability.

Fader switch uses inexpensive controller 11/12/2009

Control the brightness of an LED or incandescent lamp.

Astable multivibrator gets hysteresis from positive-feedback stage 10/22/2009

Add hysteresis through positive feedback.
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Events

Oxford University Practical RF/Microwave Design Short Course

Dates: 1/18/2010 - 1/22/2010
Location: Oxford, United Kingdom

Phosphor Global Summit 2010

Dates: 3/23/2010 - 3/25/2010
Location: San Diego, CA





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