H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube
Perfectionnements apportés aux procédés et aux dispositifs d'alimentation électrique alternative d'une charge, sans discontinuité du signal alternatif
Dispositif electrique a deux groupes de bobines couplees portes par un carte de circuit imprime, convertisseur de tension comportant un tel dispositif electrique et procede de fabrication d’un tel dispositif electrique
Installation pour la transmission de signaux auxiliaires sur une ligne téléphonique composée de plusieurs sections dans lesquelles il y a lieu d'employer, pour lesdits signaux, des courants de fréquences différentes.