Source google image: https://www.researchgate.net/profile/Tristan_Dubois/publication/281159374/figure/fig2/AS:386297026891778@1469111796656/Schema-electrique-de-la-boucle-a-verrouillage-de-phase_Q320.jpg
Schema electrique lna
Source google image: https://www.researchgate.net/profile/Tristan_Dubois/publication/281159374/figure/fig2/AS:386297026891778@1469111796656/Schema-electrique-de-la-boucle-a-verrouillage-de-phase_Q320.jpg