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EP0004233A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Temperature control device for a housing containing an oscillating piezoelectric cristal

Assignee: D'electronique Et De Piezoelectricite - Cepe Cie
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Filing: 1979-03-02
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Granted: —
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Expires: 1999-03-02
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Abstract

Abstract Translated from French L'invention fait partie du domaine des dispositifs de régulation thermique. Le dispositif de l'invention est constitué d'un circuit de mesure de température (A), comportant un pont de résistances dont certaines (R4) sont sensibles à la température, attaquant un amplificateur différentiel Z, et d'un circuit de chauffage (B), dont les éléments calorigènes sont une chaîne de transistors (T1) ... (Tn) monté en stabilisateurs de tension. Un circuit (C) assure une limitation du courant maximal par action sur la base du transistor de commande TC. Les applications concernent notamment la régulation de la température des cristaux piézoélectriques oscillants. The invention belongs to the field of thermal regulation devices. The device of the invention consists of a temperature measurement circuit (A), comprising a resistance bridge, some of which (R4) are sensitive to temperature, driving a differential amplifier Z, and a heating circuit ( B), whose circulatory elements are a chain of transistors (T1) ... (Tn) mounted in voltage stabilizers. A circuit (C) ensures a limitation of the maximum current per action on the basis of the control transistor TC. The applications relate in particular to the regulation of the temperature of the oscillating piezoelectric crystals.

Inventors

  • 👤 Gérard Marotel

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 21:40
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US3028473A Cited
US3395265A Cited
US3409757A Cited
US3482776A Cited

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