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EP0125586A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Oscillator circuit for television receivers

Assignee: Deutsche Thomson Brandt GmbH
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Filing: 1984-05-05
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Granted: —
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Expires: 2004-05-05
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Abstract

Abstract Translated from German Oszillatorschaltung in Kollektorschaltung, insbesondere für Kabeltuner. Zwischen den Oszillatorschwingkreis und den Ankoppelkondensator an die Basis des Transistors sowie in den kapazitiven Basisspannungsteiler ist je eine Kapalitätsdiode geschaltet, die zusammen mit der Abstimmdiode des Oszillatorkreises mit der Abstimmspannung in ihrem Kapazitätswert verändert werden. Hierdurch wird der Frequenzvariationsbereich wesentlich erweitert. Oscillator circuit in collector circuit, especially for cable tuners. Between the oscillator circuit and the coupling capacitor to the base of the transistor and in the capacitive base voltage divider, a capacitance diode is connected, which, together with the tuning diode of the oscillator circuit, is changed in its capacitance value with the tuning voltage. This significantly expands the frequency variation range.

Inventors

  • 👤 Gerhard Maier
  • 👤 Erich Kirschner

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 16:33
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1231; H03B5/1203; H03B5/1237; H03B5/124; H03B5/1243; H03B2200/00; H03B2200/0002; H03B2200/0008; H03B2200/003; H03B2200/004; H03B2200/0042; H03B2200/0048; H03B2200/0056; H03B2201/00; H03B2201/02; H03B2201/0208; H03B2201/03

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