IC Simplifies 115-V, 400-Hz Source

By Contributing Author, February 22, 2012

In a number of cases, an inexpensive source of 115-V, 400-Hz power with low distortion is needed for bench tests or mobile applications. This circuit, which uses the Apex Microtechnology PA25 dual power op-amp IC, can be that source (

Foundations For Tomorrow Sidebar: Alan Stummer

By Contributing Author, October 01, 2007

Most engineering undergraduates end their post-secondary education with an EE, or local equivalent. Many Physics graduate students were engineering physics undergraduates, a mix of engineering and

Foundations For Tomorrow Sidebar: Justin Rhodes

By Contributing Author, October 01, 2007

Develop Affordable Mixed-Signal Battery-Charger Designs

By Contributing Author, May 05, 2006

Using these techniques, your battery-charger designs can take advantage of the best of both the analog and digital worlds.

Latest Amateur-Radio Satellite Is No Empty Suit

By Contributing Author, April 19, 2006

We've all heard references to clueless executives as "empty suits." But the old Russian Orlon spacesuit that crew members tossed out of the International Space Station (ISS) and into freefloating Earth orbit on February 3 was anything but empty. Rather,

ED Helpline: Rotation Sensing

By Contributing Author, September 12, 2005

I have a data logger that works from 0 to 5 V dc that I'm using in a race-car application. I want to be able to convert ground distance to a 0- to 5-V dc scale. I can create any hardware needed for this application...

ED Helpline: Variable Signal Generator

By Contributing Author, September 12, 2005

Does anyone know of, or how to make, a signal generator (of sorts) that can produce a square wave output, variable from about 100 Hz all the way up to 50 kHz, and be able...

Electronic Design UPDATE: September 7, 2005

By Contributing Author, September 07, 2005

Industry View: Power And Analog Make Successful Consumer Electronics, by Julian Hayes. Conventional wisdom in consumer electronics, driven by Moore's Law, calls for increasing functionality on single systems-on-a-chip (SoCs). But the laws of physics (heat

ED Helpline: Soft Start Circuit

By Contributing Author, August 18, 2005

I am driving MOSFETs in a half-bridge configuration at 540 Hz with signals from an external unit (PWM controller is not being used to generate the switching pulse). Is there a soft-start circuit that ramps up the duty cycle...

Electronic Design UPDATE: August 10, 2005

By Contributing Author, August 10, 2005

Industry View: Embedded Linux Offers New Opportunities in Comm Access Arena, by Rakesh Tiwari. The communications access arena is rapidly changing. This highly dynamic market, with its many emerging standards and protocols, has become increasingly cost-se

ED Helpline: Negative-To-Positive Voltage Converters

By Contributing Author, July 27, 2005

I am looking for some design tips on negative-to-positive voltage converters. I am specifically looking for +5-V generation from...

Electronic Design UPDATE: July 13, 2005

By Contributing Author, July 13, 2005

Industry View: Power Reduction: Another Benefit Of Signal Integrity, by Joseph Fjelstad. Signal transmission speeds are now entering the gigahertz range, and understandably, designers are paying considerable attention to signal integrity...

ED Helpline: Human Body Detection System

By Contributing Author, July 07, 2005

I am looking for a method of detecting a human body up to 50 feet away, and then I would like to determine his/her approximate x-y location within the detection area/zone. I thought of using two passive sensors...

Electronic Design UPDATE: June 15, 2005

By Contributing Author, June 15, 2005

Industry View: What If Everyone Could Drive A Hybrid, by Richard Smith. The recent buzz about hybrid vehicles has been growing even faster than the unit sales. Clearly, that the transition to an all electric vehicle using fuel cells or high energy batteri

Electronic Design UPDATE: May 18, 2005

By Contributing Author, May 18, 2005

Industry View: IC Designers Work To Cut Power Consumption In Automotive Electronics, by Herve Branquart. Electronics have brought a great deal of improvement to today's cars: from better fuel consumption to passive safety devices...

Electronic Design UPDATE: April 20, 2005

By Contributing Author, April 20, 2005

Industry View: Residential Ethernet: Unifying Consumer A/V And Information Technology, by Michael Johas Teener. Ethernet, while extraordinarily successful as a computer network, has not been widely adopted for real-time streaming of audio or video...

Electronic Design UPDATE: March 23, 2005

By Contributing Author, March 23, 2005

Industry View: Safety Certifications Are Fine, But Look Behind The Label, by Roger Edelson. Do you need to check for UL approval or the CE mark on the off-the-shelf power-distribution units (PDUs) and conditioning equipment you purchase? Is there a wort

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By Contributing Author, March 04, 2005

Sponsored Research Sections

By Contributing Author, March 04, 2005

Ideas For Design

By Contributing Author, March 04, 2005