| US 7,386,278 B2 | ||
| Multi-band mobile communication device | ||
| Naotaka Sato, Tokyo (Japan) | ||
| Assigned to Sony Corporation, Tokyo (Japan) | ||
| Appl. No. 10/344,431 PCT Filed Jun. 12, 2002, PCT No. PCT/JP02/05850 § 371(c)(1), (2), (4) Date Jul. 28, 2003, PCT Pub. No. WO02/101945, PCT Pub. Date Dec. 19, 2002. |
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| Claims priority of application No. 2001-177619 (JP), filed on Jun. 12, 2001. | ||
| Prior Publication US 2004/0043727 A1, Mar. 04, 2004 | ||
| Int. Cl. H04B 1/38 (2006.01); H04B 1/44 (2006.01); H04B 1/40 (2006.01) | ||
| U.S. Cl. 455—73 [455/78; 455/86] | 1 Claim |
| 1. A communication apparatus comprising:
a fixed local oscillation means for generating a fixed frequency signal having a specified frequency;
a transmission modulation means for modulating a transmission signal based on a frequency of the fixed frequency signal;
a third local oscillation means for generating a third signal having a frequency within a specified range;
a transmission signal output means which changes a frequency output from the transmission modulation means to a sum or a difference
between a frequency of the third signal and a frequency output from the transmission modulation means and outputs the frequency
in accordance with a type of the transmission signal;
a plurality of reception demodulation means which is provided for reception signal types and demodulates the reception signal
based on a reception demodulation frequency;
a fourth local oscillation means for generating a fourth signal having a frequency within a specified range; and
a reception demodulation frequency output means for supplying the reception demodulation frequency to the reception demodulation
means based on output of the fourth local oscillation means and the fixed frequency signal.
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