Title:
COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/1997/017766
Kind Code:
A1
Abstract:
The influence of high-frequency noise produced from the active surfaces of ICs is suppressed and the sensitivity of a communication device is improved by appropriately arranging the ICs which are noise sources. A high-frequency analog IC (91A) and a digital IC (92A) for processing signals, both of which generate high-frequency noise, are mounted on the back (712) of a circuit board (71) with the faces of the ICs down. Namely, the active surfaces (910A and 920A) of the ICs (91A and 92A) do not face to a loop antenna (4) provided integrally with an arm band on the back side of the circuit board (71), but to a liquid crystal panel provided on the front side of the main body of the communication device. Therefore, even when high-frequency noise is produced from the active surfaces of the ICs (91A and 92A), the sensitivity of the communication device is high because noise hardly reaches the loop antenna (4).
Inventors:
NAKAZAWA TOSHIHIKO (JP)
Application Number:
PCT/JP1996/003235
Publication Date:
May 15, 1997
Filing Date:
November 05, 1996
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
NAKAZAWA TOSHIHIKO (JP)
NAKAZAWA TOSHIHIKO (JP)
International Classes:
H01Q1/27; H01Q7/00; H04B1/10; H04B1/38; H04W88/02; (IPC1-7): H04B1/06
Foreign References:
| JPH04211198A | 1992-08-03 | |||
| JPS57183100A | 1982-11-11 | |||
| JPS6164758U | 1986-05-02 |
Other References:
See also references of EP 0802637A4
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