VCO capacitor bank trimming and calibration

Details VCO capacitor bank trimming and calibration VCO capacitor bank trimming and calibration

2008-05-07

2010-12-21

Chang, Joseph (Department: 2817)

Oscillators

L-c type oscillators

C331S03600C, C331S17700V

Reexamination Certificate

active

07855610

ABSTRACT:
Techniques are disclosed for trimming a capacitance associated with a capacitor bank for use in a voltage-controlled oscillator (VCO). In an embodiment, each capacitance is sub-divided into a plurality of constituent capacitances. The constituent capacitances may be selectively enabled or disabled to trim the step sizes of the capacitor bank. Further techniques are disclosed for calibrating the trimmable capacitance to minimize step size error for the capacitor bank.

REFERENCES:
patent: 6424209 (2002-07-01), Gorecki et al.
patent: 6512419 (2003-01-01), Adams et al.
patent: 6806781 (2004-10-01), Bisanti et al.
patent: 7280001 (2007-10-01), Maligeorgos et al.
patent: 2002/0060601 (2002-05-01), Rastegar
patent: 2004/0150483 (2004-08-01), Cho
patent: 2007/0115069 (2007-05-01), Fujita et al.
patent: 2007/0182494 (2007-08-01), Talwalkar
patent: 2008/0048788 (2008-02-01), Yu
International Search Report - PCT/US09/043038 - International Search Authority - European Patent Office - Jun. 29, 2009.

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