Title: Communication apparatus, electronic equipment communication function circuit, amplifier circuit and balun circuit
Application Number: 200410064105 Application Date: 2004.08.19
Publication Number: 1592085 Publication Date: 2005.03.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03D7/14,H03B5/00
Applicant(s) Name: Sanyo Electric Co. Address:
Inventor(s) Name: Kaizaki Yasuhiro
Attorney & Agent: chen ruifeng
Abstract:
     A communication apparatus includes, as a plurality of communication functions, an amplifier for amplifying a received signal or a transmitting signal, a balun for converting an unbalanced signal to a balanced signal or converting a balanced signal to an unbalanced signal and a mixer for converting a frequency. A gain reducing unit for reducing a gain of a specific frequency band is installed in at least one of the plurality of communication functions. A band rejection filter, for example, serves as a gain reducing unit and is disposed between a pair of transistors. A plurality of band rejection filters may be so arranged as to be distributed to the plurality of communication functions.
Time: 13
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