Telecommunications – Receiver or analog modulated signal frequency converter
Reexamination Certificate
2005-10-14
2008-08-19
Nguyen, Simon D (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
C455S326000, C455S333000
Reexamination Certificate
active
07415257
ABSTRACT:
In the dual-band mixer of this invention, a current combined load is presented and is shared by two separate working frequency bands. In the invented dual-band mixer, a switch is provided to connect and disconnect an adjust capacitor series to the load inductors. By determining the capacitance of respective capacitors and the inductance of the load inductors, it is possible to generate resonance with related parasitic capacitances at particular frequencies, such that value of the load inductors may be changed. This enables the invented mixer to work with selected frequencies according to the operation of the switches. In addition, a systematic methodology is proposed to implement the design of the invented dual-band mixer. The efficient design method is approved by a 2.4/5.2-GHz CMOS mixer implementation.
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Chang Chun-Yen
Chou Mei-Fen
Wen Kuei-Ann
Bacon & Thomas PLLC.
Nguyen Simon D
Wen Kuei-Ann
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