Variable-capacitance circuit element

Oscillators – With frequency adjusting means – With voltage sensitive capacitor

Reexamination Certificate

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C331S03600C, C331S1170FE, C331S167000

Reexamination Certificate

active

07408422

ABSTRACT:
An electronic circuit element has two capacitance values selected by means of a main control signal. The electronic circuit element comprises two variable-capacitance electronic components connected in parallel and each receiving opposite intermediate control signals, derived from the main control signal. The two variable-capacitance components are differentiated by a configuration parameter. The electronic circuit element exhibits a variation in capacitance corresponding to a difference between respective variations in capacitance of the two variable-capacitance electronic components during an inversion of the main control signal. The variation in capacitance of the electronic circuit element may be less than 5 attoFarads.

REFERENCES:
patent: 6657509 (2003-12-01), Ohannes
patent: 6753738 (2004-06-01), Baird
patent: 2002/0171499 (2002-11-01), Momtaz et al.
patent: 2005/0090218 (2005-04-01), Ishida et al.
patent: 2005/0184812 (2005-08-01), Cho
patent: 2006/0255865 (2006-11-01), Li

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