Antenna connection detecting device and vehicle navigation...

Details Antenna connection detecting device and vehicle navigation... Antenna connection detecting device and vehicle navigation...

2006-05-31

2008-12-30

Yacob, Sisay (Department: 2612)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S423000, C342S463000, C342S465000, C340S540000, C340S908000, C340S980000

Reexamination Certificate

active

07471240

ABSTRACT:
A current flowing from a circuit section into an integrated antenna flows through a coil. When a pseudo up-link signal is outputted from a VICS (light) signal processing circuit to check a connection state of an integrated antenna, since a large current flows through a transmitting element for optical beacons of the integrated antenna, a drop voltage of the coil becomes large. When the drop voltage of the coil is within a prescribed range because of divided voltages of resistors, the antenna detection circuit determines that the integrated antenna is normal. In this case, since a large current flows into the coil, a coil having small impedance is used.

REFERENCES:
patent: 6011518 (2000-01-01), Yamagishi et al.
patent: 6437577 (2002-08-01), Fritzmann et al.
patent: A-2000-132793 (2000-05-01), None
patent: A-2003-234705 (2003-08-01), None

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