Oscillators – With frequency calibration or testing
Reexamination Certificate
2011-03-15
2011-03-15
Pascal, Robert (Department: 2817)
Oscillators
With frequency calibration or testing
C331S016000, C331S017000
Reexamination Certificate
active
07907020
ABSTRACT:
An oscillating signal of relatively precise frequency can be generated by tuning an oscillator using an external stable oscillating source as a reference. Calibration logic can be included to compare a signal from the local oscillator to the reference signal and vary the local signal to a desired frequency. In one embodiment, the frequency of the local signal can be constantly or periodically compared with a threshold value and if the frequency exceeds the threshold value, the local oscillator can be modified to produce a signal having a frequency that is closer to a desired frequency.
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Apple Inc.
Goodley James E
Morrison & Foerster / LLP
Pascal Robert
LandOfFree
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