Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2006-06-21
2010-11-09
Urban, Edward (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S341000, C455S234100, C330S258000
Reexamination Certificate
active
07831234
ABSTRACT:
A mixer arrangement includes a mixer cell coupled by a signal input to a mixer input, and is embodied for frequency conversion of a signal present on the input side to an intermediate frequency. A first current source is coupled to the signal input of the mixer cell, and a second current source is coupled to a signal output of the mixer cell. The mixer arrangement furthermore includes a sensor circuit embodied for detection and for outputting of a value which is derived from a current of one of the current sources. A desired value regulating circuit is coupled by a feedback input to the sensor circuit and is designed for outputting a regulating signal to the one current source derived from a comparison of a signal present at a feedback input with a desired value.
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Analysis and Design of Analog Integrated Circuits, Chapter 10 “Nonlinear Analog Circuits”, P. Gray et al., 4thEdition, John Wiley & Sons, 2004, 8 pgs.
Schelmbauer Werner
Zipper Josef
Eschweiler & Associates LLC
Hannon Christian A
Infineon - Technologies AG
Urban Edward
LandOfFree
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