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INDUSTRIALIZACIEN ELECTRENICA
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INDUSTRIALIZACIEN ELECTRENICA
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Application filed by INDUSTRIALIZACIEN ELECTRENICAfiledCriticalINDUSTRIALIZACIEN ELECTRENICA
Priority to ES0242978ApriorityCriticalpatent/ES242978A1/en
Publication of ES242978A1publicationCriticalpatent/ES242978A1/en
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo
(AREA)
Amplifiers
(AREA)
Abstract
A telephone repeater device, characterized in that it comprises, in combination: a hybrid coil or transformer, and an amplifier device, the first being connected to the input and output lines of the apparatus and coupled by induction to the amplifier system, which is constituted by two transistor amplification steps with coupling by capacitance resistance, the assembly being thus formed, together with its own direct current spring, in a hermetic receptacle from which two pairs of conductors for coupling to the telephone line emerge. (Machine-translation by Google Translate, not legally binding)
ES0242978A1958-07-081958-07-08A telephone repeater apparatus (Machine-translation by Google Translate, not legally binding)
ExpiredES242978A1
(en)
An amplifier appliance for connecting portable receivers to transistors, to the automotive electrical circuit (Machine-translation by Google Translate, not legally binding)
Telephone amplifier appliance, which is simply connected by supporting a microphone on it (Machine-translation by Google Translate, not legally binding)