RINGSIGNALGENERATOR FOR ANVENDNING I EN ABONNENTANSLUTNINGSKRETS
A ringing signal generator for generating a ringing current in a subscriber's line uses a line current inverter controlled by means of a pulse code modulated signal obtained by encoding a sinusoidal ringing signal by means of a delta modulator at a sampling frequency which considerably exceeds...
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| Format: | Patent |
| Sprache: | swe |
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| Zusammenfassung: | A ringing signal generator for generating a ringing current in a subscriber's line uses a line current inverter controlled by means of a pulse code modulated signal obtained by encoding a sinusoidal ringing signal by means of a delta modulator at a sampling frequency which considerably exceeds the frequency of the ringing current. |
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