Circuit for an output resonant cavity in a frequency-shift...

H - Electricity – 04 – B

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H04B 1/04 (2006.01) A63H 30/04 (2006.01) H03H 7/40 (2006.01)

Patent

CA 2076857

The invention concerns a circuit for the resonant cavity in a frequency-shift HF transmitter output stage, with a first capacitance (2), a first inductance (3) and a first switch (5) for feeding the HF signal to the resonant cavity. To switch the resonant cavity over to resonance with the other transmission frequency, additional capacitance (2a, 2b, 2c) or additional inductance (3a, 3b, 3c) can be switched in or out of the cavity either in parallel or in series with the cavity capacitance or in series or in parallel with the cavity inductance by means of additional switch means (4).

L'invention est un circuit associé à la cavité résonnante de l'étage de sortie d'un émetteur HF à déplacement de fréquence, un premier condensateur (2), une première bobine (3) et un premier commutateur (5) servant à transmettre le signal HF à cette cavité résonnante. Pour mettre la cavité en résonnance à l'autre fréquence d'émission, des condensateurs additionnels (2a, 2b, 2c) ou des bobines additionnelles (3a, 3b, 3c) peuvent être commutés en parallèle ou en série avec le condensateur de la cavité, ou en série ou en parallèle avec la bobine de la cavité au moyen d'un commutateur additionnel (4).

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