BIL HERD: COMPUTING WITH ANALOG
When I was young the first “computer” I ever owned was an analog computer built from a kit. It had a sloped plastic case which had three knobs with large numerical scales around them and a small...
View ArticleDIRECT DIGITAL SYNTHESIS (DDS) EXPLAINED BY [BIL HERD]
One of the acronyms you may hear thrown around is DDS which stands for Direct Digital Synthesis. DDS can be as simple as taking a digital value — a collection of ones and zeroes — and processing it...
View ArticleHOW TO BUILD A THERMOCOUPLE AMPLIFIER
A Thermocouple is a terrific way to measure temperature. The effects of temperature change on dissimilar metals produces a measurable voltage. But to make that measurement you need an amplifier circuit...
View ArticleWE ASSUME CONTROL: SPI AND A DIGITAL POTENTIOMETER
In the last video I demonstrated a Universal Active Filter that I could adjust with a dual-gang potentiometer, here I replace the potentiometer with a processor controlled solid-state potentiometer....
View ArticleCOMPLEX PROGRAMMABLE LOGIC DEVICE (CPLD) MODULE
A Complex Programmable Logic Device (CPLD) is a cool piece of hardware to have in your repertoire and it can be used to learn logic or a high level design language or replace obsolete functions or...
View ArticleNew Thermocouple Amplifier with NEMA Housing
The new Thermocouple Amplifier feature two Analog Outputs: 10mv/C° and 4-20ma current loop output, in a NEMA rated housing. This is a Thermocouple Amplifier System Based on Linear Technology’s LT1025 –...
View ArticleNew Summing Amplifier w/ Coax Driver
AD812 FEATURES Two Video Amplifiers in One 8-Lead SOIC Package Optimized for Driving Cables in Video Systems Excellent Video Specifications (RL = 150 V): Gain Flatness 0.1 dB to 40 MHz 0.02%...
View ArticlePUTTING HIGH SPEED PCB DESIGN TO THE TEST
Designing circuit boards for high speed applications requires special considerations. This you already know, but what exactly do you need to do differently from common board layout? Building on where I...
View ArticleDelta Sigma AD Converters
It’s not surprising that Analog to Digital Converters (ADC’s) now employ several techniques to accomplish higher speeds and resolutions than their simpler counterparts. Enter the Delta-Sigma (Δ∑) ADC...
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