Title:
RECEIVER, ANTENNA CHANGEOVER CIRCUIT OF RECEIVER, AND TUNER MODULE OF RECEIVER
Document Type and Number:
Japanese Patent JP2011077666
Kind Code:
A
Abstract:
To dispense with a large antenna changeover IC and an antenna changeover control signal, in PND and portable TV for receiving digital TV broadcasting that uses an external antenna provided to a car body and a built-in antenna by changeover.
A diode switch is provided instead of an antenna changeover IC, and is switched according to ON/OFF of power supply which is supplied to LNA of the external antenna. With this configuration, any one of the two antennas can be selected to simplify a component to be used and control signal, and to miniaturize the receiver.
Inventors:
TAMIZU KAZUHIDE
YAMAMOTO ETSUMI
IWAMURA MASUMI
YAMAMOTO ETSUMI
IWAMURA MASUMI
Application Number:
JP2009224923A
Publication Date:
April 14, 2011
Filing Date:
September 29, 2009
Export Citation:
Assignee:
HITACHI MEDIA ELECTRON KK
International Classes:
H04B1/18; H04B7/08; H04N5/44
Domestic Patent References:
| JP2005252338A | 2005-09-15 | |||
| JPH0730301A | 1995-01-31 | |||
| JPH10294686A | 1998-11-04 | |||
| JP2005057630A | 2005-03-03 | |||
| JP2009141449A | 2009-06-25 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation
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