Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2008-03-11
2008-03-11
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S00100A, C331S034000, C331S074000, C331S175000, C455S260000
Reexamination Certificate
active
11361290
ABSTRACT:
System and method for adjusting supply voltage to VCO to minimize affects of circuit noise on VCO. Method includes obtaining a number of data points each by incrementing a counter by the number of VCO periods during a phase of a local oscillator, changing the supply voltage, decrementing the counter by the number of VCO periods during another phase of the local oscillator, and then storing the net count. Then among the saved data points a data point is selected that is the point at or near where the VCO is least sensitive to supply changes and the VCO is set to operate at the supply voltage corresponding to this data point. A system includes a controller, up/down counter, local oscillator, and VCO. The counter counts the oscillations of the VCO and a stored net counts provide information as to where the VCO is least sensitive to the supply voltage.
REFERENCES:
patent: 5493714 (1996-02-01), Humphreys et al.
patent: 6259327 (2001-07-01), Balistreri et al.
patent: 6556089 (2003-04-01), Wood
patent: 7185239 (2007-02-01), Tiwari
Dechert LLP
Diepenbrock III Anthony B.
Kinkead Arnold
Multigig Inc.
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