Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Reexamination Certificate
2007-01-02
2007-01-02
Anderson, Matthew (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
C455S266000, C455S339000
Reexamination Certificate
active
10000394
ABSTRACT:
The invention relates to a method for tuning a filter (5). The filter has at least one variable time constant, by which the location of the pass band (pc) of said at least one filter can be changed. In the method, at least one reference signal is inputted in said filter (5), and the frequency of said at least one reference signal is changed, and/or said at least one time constant of the filter (5) is changed. The method also comprises the steps of measuring the strength of the output signal of the filter (5) and determining, on the basis of the measurement on the strength of the output signal of the filter (5), the location of the pass band of said filter (5).
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“Low-IF Topologies for High-Performance Analog Front Ends Of Fully Integrated Receivers”, IEEE Transactions on Circuits and Systems-II: analog and Digital Signal Processing, vol. 45, No. 3, pp. 1-14.
Heliö Petri
Takalo Tomi-Pekka
Anderson Matthew
Perman & Green, LLP.
Sharma Sujatha
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