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posted in May 2007
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Real-Time Operating Systems for DSP, part 8
Design How-To  
5/31/2007   Post a comment
Part 8 of this 8-part series shows how to analyze systems with aperiodic tasks. It also explains the dangers of priority inversion, and explains how to avoid priority inversion by using priority inheritance.
Design tools spur fuel cell development year round
Design How-To  
5/31/2007   Post a comment
Challenge X EXCLUSIVE: Developing a hydrogen fuel cell vehicle in three years is a daunting task. In a northern climate that only allows test driving on roads for eight months of the year, the task is nearly impossible--without the correct tools that is.
Single-chip processor replaces discrete components; reduces board space
Product News  
5/30/2007   Post a comment
Ramtron International Corp. introduced the FM33x product family, a line of FRAM-enhanced processor companions with a high-speed serial peripheral interface (SPI).
Real-time video processor LSI targets car navigation / car entertainment
Product News  
5/30/2007   Post a comment
The BU1573KV video processor LSI corrects video images in real time for improved readability, even under less than ideal ambient conditions.
Tutorial on 802.11n PHY layer : Part 3
Design How-To  
5/29/2007   1 comment
Part 3: The structures of a MIMO-OFDM transmitter and receiver are analyzed and a data rate table is constructed.
Design kit accelerates DSP development for Virtex-5 FPGAs
Product News  
5/29/2007   Post a comment
VMETRO and Impulse Accelerated Technologies have released the V5+C DSP development kit, an advanced platform for rapid prototyping and algorithm development.
Sony shows flex twist on organic LED displays
Product News  
5/29/2007   Post a comment
Sony Corp. has developed what it says is the first full-color active-matrix organic LED display on a flexible plastic substrate.
Achieving Certified IP Quality Efficiently
Design How-To  
5/29/2007   Post a comment
The increasing use of design IP has reduced design effort per gate for the chip designer, but it has had an inverse effect on the chip-level integration and functional verification effort. This article explains how using complete formal functional verification enables IP providers to certify highest IP quality, and to do so cost-effectively and with a high productivity.
High-brightness (HB) LED driver has analog and PWM dimming
Product News  
5/29/2007   Post a comment
The MAX16831 driver minimizes component count and improves overall system reliability, which is especially critical in space-constrained, harsh operating environments.
Standardized programmable power management -- An imperative for modern circuit board design
Design How-To  
5/29/2007   Post a comment
Today's circuit boards typically use several multi-voltage devices, each with a power sequencing requirement. The increase in the power supply rails, and with the need for multiple sequencing arrangements, make power management design techniques very complex. This article proposes a design solution to mitigate this complex power management problem:
How to use DSP caches, part 2
Design How-To  
5/28/2007   Post a comment
Part 2 explains how to configure caches and how to use them correctly, all with a focus on maintaining cache coherence. It shows how DMA transfers affect cached memory, and how to manage DMA transfers with double buffering.
A Simple and Efficient FFT Implementation in C++: Part II
Design How-To  
5/25/2007   Post a comment
Volodymyr Myrnyy continues his two-part article on a new, efficient implementation of the Cooley-Tukey Fast Fourier Transform (FFT) algorithm.
Backlight control technology manages power and color saturation
Product News  
5/24/2007   Post a comment
Clairvoyante has developed a new technology to balance color performance with power management in mobile displays. The PenTile Mode Control technology delivers a set of backlight control options to reduce power by as much as 65 percent or manage color purity for web-based content.
LED Driver targets automotive, general lighting applications
Product News  
5/24/2007   Post a comment
Maxim Integrated Products introduced the MAX16831 high-voltage, high-power, constant-current LED driver with analog and PWM dimming. This LED driver integrates a floating LED current-sense amplifier and dimming MOSFET driver to minimize component count in automotive and general lighting applications which use high-brightness (HB) LEDs.
Tutorial: Polar modulation and its variants
Design How-To  
5/24/2007   Post a comment
The announcement this week by Sequoia Communications of a single-chip HEDGE transceiver based on polar modulation calls out for an explanation of what polar modulation is all about and how it varies. Find out more in this special feature compilation.
Real-Time Operating Systems for DSP, part 7
Design How-To  
5/24/2007   Post a comment
Part 7 of this 8-part series shows how to analyze scheduling behavior, and how to ensure tasks meet their deadlines. It also shows how to account for interrupt latency and context switching overhead.
How to simplify hardware prototyping with EXP modules
Design How-To  
5/23/2007   Post a comment
New EXP specification defines a versatile expansion interface to FPGA baseboards that offers designers flexibility, performance, and ease of use during hardware development.
Consumer and automotive electronics converge: Part 3 - MOST details and controller architecture
Design How-To  
5/23/2007   Post a comment
This series conclusion offers a detailed explanation of MOST and examines the new Intelligent Network Interface Controller architecture that simplifies how MOST systems are integrated.
Real-Time Operating Systems for DSP, part 6
Design How-To  
5/23/2007   Post a comment
Part 6 of this 8-part series reviews various RTOS scheduling algorithms--including both "static" and "dynamic" scheduling algorithms--and explains the pros and cons of each.
Power wirewound resistors withstand harsh environments in commercial, industrial applications
Product News  
5/22/2007   Post a comment
Providing design engineers with a rugged power wirewound device capable of handling temperatures as high as 275°C, TT electronics IRC Wire and Film Technologies Division offers a series of axial wirewound resistors with power ratings from 1/2 W to 9 W.
Tutorial on 802.11n PHY layer: Part 2
Design How-To  
5/21/2007   Post a comment
With 802.11n, wireless achieved data rates equal to wireline. This article discusses the major aspects of the 802.11n PHY layer.
Freescale in-car microprocessor aims for central role
Product News  
5/21/2007   Post a comment
Freescale Semiconductor Inc. has unveiled a microprocessor that aims to integrate all the control electronics for an automobile cockpit into a single low-power device.
How to use DSP caches, part 1
Design How-To  
5/21/2007   Post a comment
Part 1 of this two-part series introduces the fundamental concepts of cache memory, using the C64x DSP as an example. It explains why caches are needed, how caches communicate with main memory, and how to optimize cache performance.
Boost regulator offers high-current output, fault protection
Product News  
5/18/2007   Post a comment
Intersil released the ISL97701; a boost regulator which provides a design for passive matrix OLEDs. With efficiency up to 87%, the ISL97701 can deliver 50 mA of output current at 18 V. It can provide up to 28 V output, enabling power-efficient operations in MP3, portable media players, automotive clustering and low-end cell phones PMOLED displays.
Optimized memory utilization boosts graphics display controller IC efficiency
Design How-To  
5/17/2007   Post a comment
The complex memory traffic patterns across GDC interfaces present potential data bottlenecks. A balanced design architecture can reduce, and even eliminate, choke points while optimizing performance, cost, and board space utilization.
ADCs operate at temperature up to 125°C
Product News  
5/17/2007   Post a comment
Linear Technology developed the LTC1403AH, a 14-bit, 2.8 Msamples/s SAR ADC which operates over the automotive -40°C to +125°C temperature range. The LTC1403AH is powered from a single 2.7 V to 3.6 V supply, draws 14 mW at 2.8 Msamples/s, and is available in a small, 10-lead MSOP package.
Real-Time Operating Systems for DSP, part 5
Design How-To  
5/17/2007   Post a comment
Part 5 of this 8-part series shows how to protect critical code and resources using semaphores, spin locks, and other techniques. It also explains how to synchronize interdependent tasks.
CPU performance combines with 2D/3D graphics processing for automotive applications
Product News  
5/16/2007   Post a comment
Fujitsu Microelectronics America added to their series of graphics display controllers with a 32-bit CPU and graphics engine on a single chip.
Ultrabright SMD LEDs have a luminous intensity of 140 to 280 mcd
Product News  
5/16/2007   Post a comment
Vishay's VLMW1100 series of ultrabright white SMD LEDs utilize high-efficiency InGaN technology to provide exceptional brightness in a compact 0603 footprint.
Nichia allies with Stanley for white LEDs
News & Analysis  
5/15/2007   Post a comment
Nichia has licensed white-LED technology to Stanley Electric, aiming at establishing its white LED in car headlights.
Under the Hood: PXI-5152 scope a design hotbed
Teardown  
5/14/2007   Post a comment
Precision oscilloscopes and laboratory instruments occupy a special place in the design flow for a new circuit or system. This is the instrument that verifies the performance of your prototype. It captures the signals your circuitry puts out and displays them on a calibrated screen. No matter how fast you think your high-speed circuit performs, the oscilloscope must run faster.

Special Issue: Airbag ASSPs: smart, sensitive
Teardown  
5/14/2007   Post a comment
Automotive airbag triggers incorporate a high degree of intelligence, as well as analog sensitivity and mixed-signal functionality. Today, smart airbags have occupant-detection features and inflate to variable volumes.
Selecting memory controllers for DSP systems
Design How-To  
5/14/2007   Post a comment
DSP system performance is often limited by I/O constraints. Here's how to make sure your memory system meets your latency requirements.
RF Fundamentals: What actually creates the 90 degree coupler phase shift? Part 3
Design How-To  
5/11/2007   Post a comment
M/A COM's Ray Kaarsberg takes the time to provide in depth details of how couplers work in this three-part technical piece. Part 3 covers the derivation of parameters, including S parameters, and conclusions derived from this analysis.
RF Fundamentals: What actually creates the 90 degree coupler phase shift? Part 2
Design How-To  
5/10/2007   2 comments
M/A COM's Ray Kaarsberg takes the time to provide in depth details of how couplers work in this three-part technical piece. Part 2 covers coupling factor, signal propagation delay, maximum coupling, and vector analysis.
Real-Time Operating Systems for DSP, part 4
Design How-To  
5/10/2007   Post a comment
Part 4 of this 8-part series shows how to detect and recover from deadlock, and how to avoid unsafe states. It also explains how to avoid corruption of shared resources.
A Simple and Efficient FFT Implementation in C++, Part I
Design How-To  
5/10/2007   Post a comment
First in a two-part series on an efficient implementation of the Cooley-Tukey fast Fourier transform (FFT) algorithm using C++ template metaprogramming.
How to choose an RTOS for your FPGA and ASIC designs
Design How-To  
5/9/2007   4 comments
As an alternative to purchasing an off-the-shelf RTOS or writing your own, a new software synthesis technique called RTOS synthesis may be of interest for certain applications.
HIL simulation boosts automotive design efficiency
Design How-To  
5/9/2007   Post a comment
Hardware-in-the-Loop simulation reduces development cost and increases the quality of a vehicle. The unit under test provides feedback for the simulation, and testing can take place early in the design cycle.
RF Fundamentals: What actually creates the 90 degree coupler phase shift? Part 1
Design How-To  
5/9/2007   Post a comment
M/A COM's Ray Kaarsberg takes the time to provide in depth details of how couplers work in this three-part technical piece. Part 1 covers transmission line theory.
LCD controllers double the Flash and RAM memory
Product News  
5/7/2007   Post a comment
The latest additions to Microchip Technology's 8-bit PIC microcontroller family with integrated LCD module deliver double the amount of Flash and RAM memory over existing 64- and 80-pin parts.
Top-down time
Automotive DesignLine Blog  
5/7/2007   Post a comment
There are cars that stick in your mind as great rides.
A primer on high-side FET load switches (Part 2 of 2)
Design How-To  
5/7/2007   1 comment
Understand the operation, functions, and key parameters of high-side FET load switches, as well as the similarities and differences between N-channel and P-channel devices
One-chip incremental encoder handles motor commutation and way or angle measurement
Product News  
5/7/2007   Post a comment
The encoder device iC-TW2 is a highly integrated sine-to-digital converter which interpolates analog sine/cosine signals from magnetic and optical sensors with a freely selectable resolution of up to 8 bit.
Tips and Tricks for Debugging Audio
Design How-To  
5/7/2007   Post a comment
This article explains how to set up an audio test rig, and how to design test audio signals. It also shows how to use test equipment including oscilloscopes, audio editing software, and your own ears.
Configurable 24-bit audio codec supports asynchronous operation
Product News  
5/6/2007   Post a comment
TI has introduced a 24-bit audio codec that supports asynchronous operation, allowing the A/D converter and D/A converter to operate with independent clocks.
Understanding Ethernet-based industrial communication protocols
Design How-To  
5/4/2007   Post a comment
New protocols including Ethernet/IP, Modbus TCP/IP and Profinet highlight a clear trend where industrial protocols are in transition to the Ethernet physical layer
Connectivity drives car audio technology
Design How-To  
5/3/2007   1 comment
Semiconductor manufacturers must provide devices that help Tier-1 suppliers develop scalable infotainment systems and allow integrating consumer gadgets into vehicles.
A primer on high-side FET load switches (Part 1 of 2)
Design How-To  
5/3/2007   Post a comment
Understand the operation, functions, and key parameters of high-side FET load switches, as well as the similarities and differences between N-channel and P-channel devices.
IBM fills 'airgap' to create faster chips
News & Analysis  
5/3/2007   Post a comment
Scientists at IBM have devised a way to create vacuum spaces between copper wires in semiconductors, and claims the technique -- which borrows from nature -- will lead to chips that consume less power or run faster.
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Rishabh N. Mahajani, High School Senior and Future Engineer

Future Engineers: Don’t 'Trip Up' on Your College Road Trip
Rishabh N. Mahajani, High School Senior and Future Engineer
7 comments
A future engineer shares his impressions of a recent tour of top schools and offers advice on making the most of the time-honored tradition of the college road trip.

Max Maxfield

Juggling a Cornucopia of Projects
Max Maxfield
20 comments
I feel like I'm juggling a lot of hobby projects at the moment. The problem is that I can't juggle. Actually, that's not strictly true -- I can juggle ten fine china dinner plates, but ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
41 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Karen Field

July Cartoon Caption Contest: Let's Talk Some Trash
Karen Field
151 comments
Steve Jobs allegedly got his start by dumpster diving with the Computer Club at Homestead High in the early 1970s.

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