Varactor folding technique for phase noise reduction in...

Oscillators – Solid state active element oscillator – Transistors

Reexamination Certificate

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C331S017000, C331S03600C, C331S17700V

Reexamination Certificate

active

06985044

ABSTRACT:
A varactor folding technique reduces noise in controllable electronic oscillators through the use of a series of varactors having relatively small capacitance. A folding circuit provides control signals to the varactors in a sequential manner to provide a relatively smooth change in the total capacitance of the oscillator. Consequently, effective control of the oscillator is achieved with accompanying reductions in oscillator noise such as flicker noise.

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