Integrated circuit for transducers

H - Electricity – 03 – L

Patent

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Details

H03L 1/00 (2006.01) H03L 5/00 (2006.01)

Patent

CA 2093764

The present invention comprises an oscillator including a transformer having a first winding with a power feed to the center tap. A first pair of transistors in a push-pull configuration are connected at the emitter electrodes across the second winding of the transformer. A center tap on the second winding is provided for a negative polarity power return. The base electrodes of the transistors are commonly connected to receive a control current and the collector electrodes of the transistors are connected across a first winding of the transformer. A capacitive element is connected across the first winding to create a tuned circuit within an oscillator.

La présente invention porte sur un oscillateur incluant un transformateur ayant un premier enroulement alimenté à une prise centrale. Elle utilise une première paire de transistors en montage symétrique dont les électrodes des émetteurs sont connectées aux bornes du second enroulement du transformateur. Ce second enroulement porte une prise d'alimentation centrale à polarité négative. Les électrodes des bases des transistors sont connectées de façon à recevoir un courant de commande et les électrodes des collecteurs sont connectés aux bornes du premier enroulement du transformateur. Un élément capacitif est connecté aux bornes du premier enroulement pour créer un circuit d'accord dans l'oscillateur.

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