Oscillators – Solid state active element oscillator – Transistors
Reexamination Certificate
2006-03-28
2006-03-28
Chang, Joseph (Department: 2817)
Oscillators
Solid state active element oscillator
Transistors
C331S167000
Reexamination Certificate
active
07019597
ABSTRACT:
The present invention generally relates to voltage-controlled oscillators. More specifically, the present invention relates to method and circuitry for implementing a differentially tuned varactor-inductor oscillator. In one exemplary embodiment, the present invention includes an LC tank circuit having a couple of terminals, a first and second capacitors, and a first and second varactors. The first and second varactors are connected in series forming a first and a second node. The first capacitor connects the first node and one terminal of the LC tank circuit. The second capacitor connects the second node and the other terminal of the LC tank circuit. A pair of differential input control signals is applied across the first and the second varactors, respectively, to tune the LC tank circuit thereby generating an oscillator output.
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Broadcom Corporation
Chang Joseph
Christie Parker & Hale LLP
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