TELEPHONE INSTRUMENTS

In a control circuit for the two speech paths of a hands-free telephone, logarithmic analog to digital converters 133,134 generate digital words corresponding to the signal amplitudes on the two paths. These words are compared with stored references in decision logic and the relative attenuation of...

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Bibliographische Detailangaben
1. Verfasser:	KENNETH ALEXANDER MANSON ARTON
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY INSTRUMENTATION OR DASHBOARDS FOR VEHICLES PERFORMING OPERATIONS TELEPHONIC COMMUNICATION TRANSMISSION TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	In a control circuit for the two speech paths of a hands-free telephone, logarithmic analog to digital converters 133,134 generate digital words corresponding to the signal amplitudes on the two paths. These words are compared with stored references in decision logic and the relative attenuation of the paths is adjusted by switched attenuators 131,132 according to the result of this comparison. The total loop gain is maintained substantially constant.