IC Simplifies Support For FIPS 140-2 Level 4 Digital Encryption

By John R. Ambrose, December 07, 2009

Add Caliber Determination To Gunshot Detectors

By John R. Ambrose, September 14, 2006

Many communities are installing gunshot detectors on lamp poles to help triangulate the location of gunfire during holidays or to help in responding to "shots fired" 911 calls. Besides location, another piece of useful information is the caliber

Calculate System THD Without Measuring Noise

By John R. Ambrose, April 13, 2006

Designing total-harmonic-distortion (THD) measurement into a system usually involves a notch filter and a broadband ac measurement. The problem with this technique is that it measures both THD and noise. DSP-based test equipment can calcula

Standalone Circuit Converts Square Waves To Sine Waves

By John R. Ambrose, January 20, 2005

Many microcontrollers or PICs will have uncommitted digital-to-analog converter (DAC) outputs that can be used to generate sine waves. But these are generally low resolution (8 to 10 bits), yielding a total harmonic distortion (THD) in the 1% range. O