Frequency shift key modulating oscillator

H - Electricity – 03 – B

Patent

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Details

H03B 1/00 (2006.01) H03B 5/08 (2006.01) H03B 5/30 (2006.01) H03B 5/36 (2006.01) H03C 3/00 (2006.01) H04L 27/12 (2006.01) H03B 5/12 (2006.01) H03B 5/32 (2006.01)

Patent

CA 2192294

The present invention teaches a system for selectably oscillating at a first or a second oscillating frequency. The system comprises an oscillator for providing an oscillating output. Moreover, the system comprises a switching device for selecting a first or a second impedance in response to a select signal having a voltage. Each of the first and second impedances are fixed independently of the select signal voltage such that the oscillating output oscillates at the first oscillating frequency when the first impedance is provided and oscillates at the second oscillating frequency when the second impedance is provided.

Cette invention concerne un générateur de vibrations à deux fréquences. Le générateur comporte un oscillateur d'excitation et un commutateur permettant de faire intervenir une de deux impédances selon la tension du signal de commande. Les deux impédances fixes ne peuvent être modifiées selon l'intensité du signal de commande de sorte que l'oscillateur génère des vibrations à une première fréquence lorsque la première impédance est appelée et à une seconde fréquence lorsque la seconde impédance est appelée.

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