Arrangement and method for communicating audio and dc signals

Details Arrangement and method for communicating audio and dc signals Arrangement and method for communicating audio and dc signals

G - Physics

08

B

G08B 29/06 (2006.01) H04B 3/54 (2006.01)

Patent

CA 2734792

An arrangement includes an input, a modulation circuit, an isolation circuit, a demodulator circuit, a detector circuit and at least two outputs. The input is configurable to receive an audio signal and a DC voltage. The modulation circuit is configured to modulate the audio signal and the DC voltage. The isolation circuit has an input electrically isolated from the output, wherein its input coupled to the modulation circuit. The demodulator circuit is operably coupled to the output of the isolation circuit and configured to extract the audio signal therefrom. The detector circuit is operably coupled to the output of the demodulator, and is configured to generate a first signal responsive to detection of a modulated signal corresponding to the DC voltage modulated by the modulation circuit.

Un montage selon l'invention comprend une entrée, un circuit de modulation, un circuit d'isolation, un circuit démodulateur, un circuit détecteur, et au moins deux sorties. L'entrée est configurable pour recevoir un signal audio et une tension CC. Le circuit de modulation est configuré pour moduler le signal audio et la tension CC. Le circuit d'isolation a une entrée isolée électriquement de la sortie, son entrée étant couplée au circuit de modulation. Le circuit démodulateur est couplé fonctionnellement à la sortie du circuit d'isolation et configuré pour extraire le signal audio de celle-ci. Le circuit détecteur est couplé fonctionnellement à la sortie du démodulateur, et est configuré pour générer un premier signal en réponse à la détection d'un signal modulé correspondant à la tension CC modulée par le circuit de modulation.

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