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HELENTRONICA

Electronics, Physics and Rock 'n' Roll

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25 Mbps discrete logic transceiver – TX prototype debugging

Introduction In my previous post, I talked about the design of a simple 25 Mbps transmitter with PRBS generator, encoding and pre-emphasis. I designed the circuit using the discrete logic components in order to get a better understanding of modern transceiver circuits. Since the standard (25 Gbps and higher) transceivers are implemented in the silicon

25 Mbps discrete logic transceiver: Building a 25 MHz PLL with 74HC4046

Introduction In the receiver portion of my 25 Mbps discrete logic transceiver project, I will eventually need a functional phase-locked loop (PLL) for one reason or another, but certainly for the clock data recovery circuit (CDR). Browsing the suitable components, that is, 5V CMOS, able to work with 25 MHz, not being super clunky and

25 Mbps discrete logic transceiver for learning purposes

Introduction I am about to build a full PHY (physical, duh) layer for data transmission that simulates the multi-Gbps transceiver circuits usually seen in high-end FPGAs and ASICs. The reason I m doing that is to get a closer understanding of the inner architecture of these advanced circuits, so ubiquitous in modern communication systems. To really

TouchGFX on a custom made low cost board with the ILI9341 controller over SPI

Introduction STMicroelectronics has spent last couple of years developing their embedded graphics framework called TouchGFX. This very powerful graphics engine makes it possible to include snazzy, smartphone-like screens and widgets into the embedded application, what I feel like becomes defacto a standard nowadays. Along with it, they shipped a lot of dev boards and reference

A Year in a Review

Introduction Yes, new year is here and it s a perfect time to get to this blog back again. For this post I decided to look back at some social aspects of my engineer s year. New Job As of end of 2017 I joined a new company IMS Nanofabrication. It s an Austria based semiconductor fab

Building a Circulator out of Ceramics

Introduction During my time as a PhD student, I had an opportunity to work in the laboratory of ceramic technologies. I got to produce various electronic components based on so-called low temperature co-fired ceramics, or LTCC. Although it s been more than 2 years since I left that lab, I found some time to reflect back

Playing with an LMG670 power analyzer

Introduction Recently, I got my hands on a not-every-day piece of electronic instrumentation, a so-called power analyzer LMG670 by company ZES Zimmer. I was told it s just a big multimeter and I could use it to test power efficiency of our system. Power analyzer allows us to measure voltage, current, power and all relatable values on one, two

EMC, come and see!

Introduction For the past month or two, I ve been dealing with the EMC issues on our projects. I ve become our team s EMC guy due to my high-frequency background and because the most of the team members are either IC or FPGA design people. And because no-one wants to deal with tedious things like compliance, standards

Advanced PCB Layout Course by Fedevel Academy

Introduction Being a freelancer, one can never stop improving himself, get a new trade or sometimes even to revise the things he has already mastered. With this in mind, I came across Advanced PCB Layout Course by Fedevel Academy, a hardware design/consultancy company by great engineer Robert Feranec. This post is about my impressions, experiences

Playing with a signal demodulator

Last week I got a Christmas present! Actually, it s not a present, it s a tool for work. But it is a brand new spectrum analyzer! Actually, it s not brand new, it s at least 15 years old. The basement guy found it in the company s basement and brought it to my office to see if I