About Joël
English
Conversational
German
Conversational
French
Native or bilingual
Experience
- VoxlineDesign of a Wien bridge filter equalizerTECHAugust 2025 - December 2025 (4 months)Brive-la-Gaillarde, FranceDesign of a two-times ten-band equalizer based on the principle of Wien bridge resonant filters, separating its outputs between low and high frequencies (around 135 Hz) for use with a bi-amplification system.The circuit was designed around locally feedback triodes and was fully simulated using ng-spice (frequency response and total harmonic distortion) before proceeding with the fabrication of the circuits on eight-layer FR4-180 PCBs.
- ConfidentielCommunication SystemsDEFENSE AND MILITARYJune 2025 - December 2025 (6 months)Brive-la-Gaillarde, FranceDesign of several UHF communication boards (868 MHz band) with antenna diversity, incorporating both CC1120 or SX1262 modulators and cellular modems. Antenna qualification, calculation of antenna tuning circuits. Constrained routing on 10-layer boards of 40 mm x 40 mm.
- FUGVHDL SoC DesignTECHFebruary 2024 - December 2024 (10 months)Tempe, United StatesDesign of an MC6809 compatible processor core (pin-to-pin in a 40-pin DIL package).Project continued for my own use by adding:- Additional registers and instructions from the HD6309;- A floating-point unit (single and double precision);- 64-bit extensions to the processor core;- Peripherals (ACIA, PIA, PTM, I2C, SPI);- Cache memories (level 1 'direct mapped' and level 2 'associative');- A bus arbitration system;- A HyperRAM interface;- A Memory Management Unit (in progress).An Artix7 FPGA can today accommodate four 63F09 cores (ALU/FPU 64-bit, 36-bit address bus after MMU) operating at 600 MHz.More information here: https://63f09.systella.fr
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Education
- Aerospace Electronics and Telecommunications EngineerESME-Sudria1996Électronique analogique et numérique. Traitement du signal. Télécommunications aérospatiales. Mécanique générale.
- Master's degree in Communication Devices and TechniquesENST PARIS1998Optoélectronique. Hyperfréquences. Communications numériques.
Certifications
- BR/H0Dekkra2013