Telecommunications – Transmitter – Convertible to different type
Reexamination Certificate
2006-02-28
2006-02-28
Bui, Bing Q. (Department: 2642)
Telecommunications
Transmitter
Convertible to different type
C455S075000, C455S076000
Reexamination Certificate
active
07006803
ABSTRACT:
The power amplification circuit for a communication device includes an initial-stage amplifier for amplifying a modulation signal of a predetermined frequency band, a first amplification system having a subsequent-stage amplifier and a final-stage amplifier for amplifying power of an amplified output of the initial-stage amplifier without modification and outputting the amplified output as a first transmission signal, and a second amplification system having a frequency conversion circuit composed of a local oscillation circuit and a mixing circuit for converting an amplified output of the initial-stage amplifier into a signal of a frequency band different from that of the first transmission signal and a subsequent-stage amplifier and a final-stage amplifier for amplifying power of an output signal of the frequency conversion circuit and outputting the amplified output as a second transmission signal.
REFERENCES:
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patent: 5966666 (1999-10-01), Yamaguchi et al.
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patent: 6064665 (2000-05-01), Leuck et al.
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patent: WO 98/00927 (1998-01-01), None
UK Examination Report dated Jul. 24, 2003.
Bui Bing Q.
NEC Corporation
Scully Scott Murphy & Presser
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