Oscillators – With frequency adjusting means – With voltage sensitive capacitor
Reexamination Certificate
2006-02-07
2006-02-07
Mis, David (Department: 2817)
Oscillators
With frequency adjusting means
With voltage sensitive capacitor
C331S1170FE, C331S176000
Reexamination Certificate
active
06995626
ABSTRACT:
The invention is directed to a tunable, capacitive component that includes a pair of MOS transistors whose gate connections are connected via a respective coupling capacitance to a pair of circuit nodes between which the tuned capacitance can be tapped off. The four load connections of the MOS transistors are connected to one another. In addition, a tuning input and a reference signal input are provided that are both coupled to the transistor pair. In this arrangement, the reference signal input is designed for setting the operating point of the transistors. The tunable capacitance has a large tuning range and also a low series resistance and permits good linearity properties on account of the operating point setting. The component can be used advantageously in LC oscillators.
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Oehm Jürgen
Pham-Stäbner Duyen
Eschweiler & Associates LLC
Infineon - Technologies AG
Mis David
LandOfFree
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