Oscillators – L-c type oscillators
Reexamination Certificate
2006-09-06
2008-12-09
Pascal, Robert J. (Department: 2817)
Oscillators
L-c type oscillators
C331S1170FE, C331S17700V, C331S179000
Reexamination Certificate
active
07463107
ABSTRACT:
The invention is directed to a resonant circuit having a frequency-determining element which has at least one switchable frequency-changing element connected in parallel therewith. The frequency-changing element has two series-connected transistors whose control connections are connected to a node that receives a fixed potential. First connections of the two series-connected transistors are connected to one another and also to a control input for a control signal for switching the frequency-changing element of the resonant circuit. The invention keeps the control voltage for the two transistors at a higher potential than the threshold voltage for the transistors. This reduces a parasitic capacitance in the two transistors during operation.
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patent: 5739730 (1998-04-01), Rotzoll
patent: 6859112 (2005-02-01), Mason
patent: 7271673 (2007-09-01), Song
patent: 2005/0174184 (2005-08-01), Wu
patent: 103 92 359 (2005-05-01), None
“Solid State Electronic Devices”, Ben G Streetman and Sanjay Banerjee, Fifth Edition, Prentice Hall 2000, 8 pgs.
“The Design of CMOS Radiofrequency Integrated Circuits”, Field-Effect Transistors, Chapter 6, T. Lee, Edition 2004, 3 pgs.
Eschweiler & Associates LLC
Infineon - Technologies AG
Johnson Ryan J.
Pascal Robert J.
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