Infrared radio bidirectional languages teaching apparatus

The utility model discloses an infrared radio bidirectional language teaching device. Infrared signals received by an earphone of the utility model are treated through photoelectric conversion and preamplification, then input for killer amplification, FM demodulation and power amplification by a dem...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHAOMING WANG, ZUYING YU, YONGQING CHEN
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES PHYSICS PLANETARIA SEALS
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Beschreibung
Zusammenfassung:	The utility model discloses an infrared radio bidirectional language teaching device. Infrared signals received by an earphone of the utility model are treated through photoelectric conversion and preamplification, then input for killer amplification, FM demodulation and power amplification by a demodulating input foot of an infrared receiving special IC UE706 or UE705 or UE706A, and finally sent by a power output foot to a speaker for sounding. The utility model has the advantages of no need of wiring indoors, low cost, low investment, convenient installation and operation, stable and reliable performance, little power consumption, voice bidirectional transmission, good teaching effect, etc.