Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
H04B1/40—Circuits
H04B1/44—Transmit/receive switching
H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
Frequenzwandler, in welchem modulierte Traegerschwingungen mit oertlich erzeugten Schwingungen von anderer Frequenz zur Bildung von Zwischen-frequenzschwingungen gemischt werden
Schaltungsanordnung zum Empfang und zur Erzeugung ungedaempfter elektrischer Schwingungen, besonders im Gegensprechverkehr fuer drahtlose Telegrafie und Telefonie