Antenna unit and receiving circuit

Details Antenna unit and receiving circuit Antenna unit and receiving circuit

2007-05-01

2007-05-01

Deane, Jr., William J. (Department: 2614)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S280000

Reexamination Certificate

active

09921421

ABSTRACT:
An antenna unit includes an antenna, a high-frequency amplifier, an attenuator circuit, an output cable, and a voltage detector circuit. An operating voltage is supplied from a receiver to the high-frequency amplifier through the output cable. The operating voltage changes in accordance with an automatic gain control (AGC) voltage. The voltage detector circuit detects a change in the operating voltage. In response to the voltage detector circuit output, one of the high-frequency amplifier and the attenuator circuit is selectively connected to a signal line between the antenna and the output cable.

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patent: 0847135 (1998-06-01), None
patent: 05-022174 (1993-01-01), None
patent: WO0008751 (2000-02-01), None

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