The surprising differences between ARM MCU cores that appear to be identical
There are many reasons why the ARM Cortex-M series of processor cores has come to dominate the market for 32bit microcontrollers. Across the many varieties of Cortex-M cores, design engineers can choose from an array of performance, power consumption and communications capabilities, allowing them to find an ARM based MCU which will be suitable for almost any application...
EMC basics and practical PCB design tips
07.05.2018 · Articles
Though often used as synonyms, Electromagnetic Compatibility (EMC) is really the controlling of radiated and conducted Electromagnetic Interference (EMI); and poor EMC is one of the main reasons for PCB re-designs. Indeed, an estimated 50% of first-run boards fail because they either emit unwanted EM and/or are susceptible to it...
The down side of free samples
06.18.2018 · Articles
If you’ve had hassles trying to get component samples for a project, you can thank the efforts of a few enterprising students for making your life more complicated. Here’s a microcosm of what has happened with sample parts: The folks at Texas Instruments used to have a liberal policy about giving out free samples of the firm's ICs, even those that are relatively expensive...
1st Intel Pentium processor is shipped, March 22, 1993
06.12.2018 · Articles
The first Intel Pentium processor was shipped on March 22, 1993, kicking off what would become a core line for the company and a well-regarded brand to the public. The name Pentium came from the Greek word pente, meaning "five," referring to Intel's fifth-generation microarchitecture, the P5...
Signal distortion from high-K ceramic capacitors
06.11.2018 · Articles
Multilayer ceramic capacitors are used extensively in modern electronics because they offer high volumetric efficiencies and low equivalent series resistances at attractive prices. These advantages make MLCCs nearly ideal for a wide range of applications, including output capacitors for power supplies and local decoupling capacitors for integrated circuits...
Measuring Stability In A Logic-Gate-Based Oscillator
05.21.2018 · Articles
Designers seeking a quick and easy frequency source often use a relaxation oscillator based on digital gates such as the 74HC14 inverter with hysteresis. The oscillator is also useful in sensor signal digitization when using resistive or capacitive sensors instead of fixed components in the circuit...
Power for the Professional: What's New in Autodesk EAGLE 9.0
05.15.2018 · Articles
Sam Sattel, Autodesk Ladies and gentlemen, the next major update for Autodesk EAGLE has landed! This release is all about upgrading the professional tool that you know...
Beyond the Op Amp - Designing With IC Comparators
05.11.2018 · Articles
A comparator is a great circuit because it provides a near ideal transition between the analog and digital domains. The comparator looks at two linear input signals and gives a digital output that’s either high or low depending on whether one input is above or below the other. Simple, but widely useful...
Use Current to Drive Solenoid, Relay from Array of Voltages
04.17.2018 · Articles
Rather than use a fixed-rail voltage source, it’s more efficient and flexible to utilize a current source so that performance remains consistent while supply rail and coil resistance change...
Circuit Ensures Smooth "Soft Start" for Isolated Converter, Limits In-Rush Current
04.04.2018 · Articles
Most dc-dc converters require a soft-start circuit to limit the in-rush current at startup. Although a smooth soft start is required for systems with power-on reset, this is difficult to implement in an isolated converter with a controller on the primary side and a limited duty cycle or current...