Oscillators – With frequency adjusting means – With voltage sensitive capacitor
Reexamination Certificate
2006-08-29
2006-08-29
Chang, Joseph (Department: 2817)
Oscillators
With frequency adjusting means
With voltage sensitive capacitor
C331S03600C, C331S1170FE
Reexamination Certificate
active
07098751
ABSTRACT:
A circuit and method for providing a tunable capacitance for a voltage control oscillator (VCO) in which at least one P-N junction varactor and at least one metal oxide semiconductor (MOS) accumulation-mode varactor are effectively coupled and tuned in parallel, thereby providing a net tunable capacitance with which the VCO will realize an optimal combination of quality factor, phase noise, and gain characteristics.
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Chang Joseph
National Semiconductor Corporation
Vedder Price Kaufman & Kammholz P.C.
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