Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2006-12-19
2006-12-19
Urban, Edward F. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S324000, C455S326000
Reexamination Certificate
active
07151919
ABSTRACT:
The invention relates to a method for forming at least two intermediate frequency signals with different phases in a mixer (1), to which a first signal (RF) and a second signal (LO) are conducted. According to the method, the first intermediate frequency signal is formed by shifting the phase of the first signal (RF) and by mixing the phase-shifted first signal (RF) and the second signal (LO). The second intermediate frequency signal is formed by mixing the first signal (RF) and the second signal (LO). The phase shift of the first signal (RF) is performed in the mixer (1).
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“A 5.1-5.8GHz Low-Power Image-Reject Downconverter in SiGe Technology”; Long et al.; 1999 IEEE; pp. 67-70.
Takalo Tomi-Pekka
Viljanen Ari
Jackson Blane J.
Nokia Corporation
Perman & Green, LLP.
Urban Edward F.
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