ENHANCED AUTOMATIC LINE BUILD OUT

A control voltage mechanism (6, 12 - Figure 1) applies a control voltage (Vc) to a tuning diode or varactor (CR1) of a line build out circuit (2- Figure 1). The control voltage (Vc) is indicative of the length of a cable over which a signal has travelled. The capacitance of the tuning diode or varac...

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Bibliographische Detailangaben
Hauptverfasser:	DENIS POIRIER, RAMON J. MOLNAR
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A control voltage mechanism (6, 12 - Figure 1) applies a control voltage (Vc) to a tuning diode or varactor (CR1) of a line build out circuit (2- Figure 1). The control voltage (Vc) is indicative of the length of a cable over which a signal has travelled. The capacitance of the tuning diode or varactor (CR1) is changed according to the control voltage (Vc). A resistor (R1) is connected to the cathode of the tuning diode or varactor (CR1) and a capacitor (C1) is connected to the anode of the tuning diode or varactor. A signal can be measured at the cathode, which corresponds to the incoming signal and has been attenuated by frequency roll-off in accordance with the length of the cable over which the signal has travelled. In this way, attenuation for signals over cables of various length can be equalised in a manner which not only takes into account attenuation due to the length of the cable, but also selective attenuation of different frequency components of the signal.