Peeking inside an HDD

I’ve expressed no shortage of admiration in past writeups (stretching back…oh…a quarter century or so…) for the flash memory industry’s incremental cost, capacity, performance and reliability accomplishments over the years. I suppose I’m (more than) a bit biased because my post-college (not including during-college-co-op) engineering “origin story” involves eight years with Intel as an applications … Read more

Elegant Circuits: Simple Chaotic Oscillators (Book review)

Chaos Theory has been an important pursuit of physicists and mathematicians since it was brought to the forefront as a distinct phenomenon in the early 1960s. This early exposition got the attention of the scientific community by—in the best tradition of the scientific method—displaying experimental results that did not comport with theory. Mathematicians had various … Read more

5G phased array development platform

Avnet and Fujikura have collaborated on a 5G FR2 phased array antenna development platform for mmWave frequency bands. The platform allows engineers to develop and prototype 5G mmWave systems based on the AMD-Xilinx Zyng UltraScale+ RFSoC Gen3 device and Fujikura’s FutureAccess phased array antenna module (PAAM). Avnet’s RFSoC Explorer software, a native MATLAB application, is … Read more

Interposer accommodates PCIe 5.0 traffic

Teledyne Lecroy’s PCIe 5.0 Mini Cool Edge IO (MCIO) interposer works with its Summit family of protocol analyzers to capture and decode PCIe 5.0 traffic. The interposer enables engineers to test products that incorporate card edge connectors or cabled connector assemblies that employ the MCIO mechanical connector with PCIe 5.0, NVM Express, or Compute Express … Read more

Precision synchronous detection amplifier facilitates low voltage measurements

This design idea presents a practical circuit that implements synchronous detection to amplify small DC voltages with high linearity and excellent noise immunity. Such circuits are required in measurements involving current shunts, load cells, thermocouples, etc. Synchronous detection is explained in many books, papers and instrument manuals. If you are not familiar with the topic, … Read more

Dual N-channel JFET lowers noise in precision instrumentation and sensors

The LS844 monolithic dual N-channel JFET from Linear Systems provides low input capacitance, substantially reducing intermodulation distortion. Targeting precision instrumentation and sensor applications, the LS844 offers a combination of high transconductance, low noise of 2.5 nV/√Hz typical at 1 kHz, and low input capacitance of just 3 pF typical and 8 pF maximum. Constructed by … Read more

Don’t rely on the automatic settings of your SPICE simulator

A lot of things happen automatically all around us. Even our own breathing and heart rate are automatic. Still, trusting in the automatic can be a mistake sometimes and the following is a simple case in point. That SPICE simulator you’ve been using is one pretty spiffy little tool, isn’t it? All kinds of analytic … Read more

5G O-RAN test suite moves to the cloud

Keysight’s Open Radio Access Network Architect (KORA) test software is now available in the cloud for improved flexibility and rapid deployment. The company also announced that its LoadCore software for testing 5G Core (5GC) can now be purchased as a metered, pay-as-you-go product through Amazon Web Services (AWS) Marketplace. The KORA suite verifies the functionality … Read more

Simple GPS Disciplined 10MHz Reference uses Dual PWMs

I was recently working on an experiment for a new design and was using a function generator. Although new function generators have pretty good frequency tolerance specs, I needed something with more accuracy and precision. The way to get more accuracy in frequency generators, arbitrary waveform generators, and frequency counters is to use the 10 … Read more