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Title:
RECEIVING CIRCUIT
Document Type and Number:
Japanese Patent JP3690889
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a receiving circuit which receives different radio frequency bands and can be miniaturized.
SOLUTION: A receiving circuit accessable to plural mobile communication systems using different radio frequency bands is provided with an individual processing circuit for each radio frequency band, which converts a high-frequency input signal 1 to the signal of an intermediate frequency 29, and a shared circuit shared by each radio frequency band including a quadrature demodulation circuit 15 converting the signal of the intermediate frequency to a direct base band signal. Miniaturization is made possible by sharing a part of the circuits.


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Inventors:
Takashi Enoki
Application Number:
JP29986996A
Publication Date:
August 31, 2005
Filing Date:
October 25, 1996
Export Citation:
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Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04L27/34; H04B1/40; H04B7/08; H04Q7/32; (IPC1-7): H04L27/34
Domestic Patent References:
JP5065139U
JP7212289A
JP7059162A
JP5091071A
JP63501116A
JP6069841A
JP2268026A
Attorney, Agent or Firm:
Masaaki
Ohashi
Masanori Hirano



 
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