Engineer's lair (Est. Dec. 2021)

This section is For Engineer Eyes only.

It collects some disclosed FEE internal technical notes, tricks, software,... given "as is". Ideas described here can be valuable or not.

All the resources herein belong to FEE and are free for non-commercial use.

Items will be added on an irregular basis, corrections and technical comments (or any kind message) are welcome.

Feedback can be sent to: engineer@fee.bzh

Analog / RF

Symmetric power splitter/combiner

Low-cost power splitter/combiner for differential HF-VHF signals.

Bruit dans les montages à amplificateurs opérationnels en RF

Noise study on several OpAmp-based RF amplifiers structures. ( french, math)

Digital

Arithmetic DMTD : Glitch-free sub-picosecond time difference measurements for clock signals (french version)

Generalization and enhancement for the standard Digital DMTD (Dual-Mixer Time Difference) design. The DDMTD is used for example inside CERN's White Rabbit over ethernet synchronization system or PTP v2.1 (IEEE1588-2019 High Accuracy Profile). ( math, "time-nuts")

Digital Signal Processing

Numerically-Controlled Oscillators : Brief description of NCOs implementation (french version)

Mainly LUT-based any-base NCOs for exact frequency generation. ( math)

Conversion en bande de base : Démodulation numérique

Description of a standard DDC (Digital Down Converter) architecture. ( french, math)

DFTs and FFTs : Description de transformées de Fourier discrètes & rapides

Notes on Discrete Fourier Transforms & Fast Fourier Transforms. ( french, math)

Générateurs pseudo-aléatoires : Caractérisation de quelques générateurs pseudo-aléatoires

Raw notes on pseudo-random generators. ( french, math)

Mixed-signal, miscellaneous

Les convertisseurs A/N et l'acquisition en RF : Acquisition numérique en RF

Some notes on use of high speed ADCs for RF domain. ( french, math)

PLLs pour pilotes et synthétiseurs 1 : Etude d'architectures de PLLs - 1 - Généralités, bases

Theoretical study/ideas on PLLs for telecom & RF domains - part 1: classic PLLs. ( french, math)

(preview on request) PLLs pour pilotes et synthétiseurs 2 : Etude d'architectures de PLLs - 2 - PLLs hybrides

Theoretical study/ideas on PLLs for telecom & RF domains - part 2: hybrid PLLs. ( french, math, insane)

(preview on request) PLLs pour pilotes et synthétiseurs 3 : Etude d'architectures de PLLs - 3 - Chaînage de PLLs

Theoretical study/ideas on PLLs for telecom & RF domains - part 3: chaining PLLs. ( french, math)

Freeware

bin2txt.exe : small utility for binary ⇔ text conversion

This small 32-bit Microsoft® Windows® command-line utility allows conversion between binary data files (8,16,24,32-bits signed/unsigned integer, 32,64-bit float) and text files. Mainly used for binary data integration in source code.

Logical thoughts