Oscillators – L-c type oscillators
Reexamination Certificate
2011-01-04
2011-01-04
Kinkead, Arnold (Department: 2817)
Oscillators
L-c type oscillators
C331S17700V, C331S179000, C331S1170FE, C331S1170FE
Reexamination Certificate
active
07863994
ABSTRACT:
System and method for increasing the frequency tuning range of a RF/microwave LC oscillator. A preferred embodiment comprises a voltage controlled oscillator (VCO) configured to generate an output signal at a frequency that is dependent upon a magnitude of an input voltage level and an effective inductance of an inductive load and a variable inductor coupled to the VCO. The variable inductor comprises a primary inductor coupled to the VCO to produce a magnetic field based upon a current flowing through the primary inductor and a secondary inductor magnetically coupled to the primary inductor, the secondary inductor to affect the magnitude of the effective inductance of the primary inductor.
REFERENCES:
patent: 6870457 (2005-03-01), Chen et al.
patent: 2004/0196110 (2004-10-01), Boccuzzi et al.
Barton Nathan
Hung Chih-Ming
Leipold Dirk
Brady W. James
Kinkead Arnold
Shaw Steven A.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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