Oscillators – With frequency calibration or testing
Reexamination Certificate
2011-07-26
2011-07-26
Pascal, Robert (Department: 2817)
Oscillators
With frequency calibration or testing
C331S004000, C331S017000, C345S174000
Reexamination Certificate
active
07986193
ABSTRACT:
Disclosed is a system and method for providing an oscillating signal of relatively precise frequency without using a signal provided by a crystal as a reference. Disclosed is a feedback oscillator circuit configured to output an oscillating signal having a frequency defined by a reference signal. The oscillating signal can be sent to one or more circuits including at least one frequency sensitive element. The frequency sensitive element produces an output signal which depends on the frequency of the oscillating signal. A controller controls the reference signal in order to cause an attribute of the output signal to have a value within a desired range.
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Apple Inc.
Goodley James E
Morrison & Foerster / LLP
Pascal Robert
LandOfFree
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