TV or radio broadcast transmission line amplifier with switch by

Television – Image signal processing circuitry specific to television – Switching

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348 6, 348725, 455 31, 455287, H04N 544

Patent

active

058961836

ABSTRACT:
A wireless receiving subsystem operatively connectable to a broadcast receiver unit having a frequency tuner has an antenna with a feed point, an amplifier located essentially at the feed point, and a transmission line extending from the feed point of the antenna and the amplifier to a signal input of the broadcast receiver unit. The transmission line having a pair of conductors, for example, coaxial conductors. A manually operated switch is disposed in the transmission line for applying a DC voltage across the conductors, while a relay switch is operatively connected to the transmission line for changing a connection state of the amplifier to the transmission line in response to the voltage.

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patent: 5345591 (1994-09-01), Tsurumaki et al.
patent: 5678214 (1997-10-01), Azuma
patent: 5797090 (1998-08-01), Nakamura

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