Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2007-05-15
2010-02-02
Chang, Joseph (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S00100A, C331S011000, C375S376000
Reexamination Certificate
active
07656236
ABSTRACT:
A frequency synthesizer is disclosed. According to one embodiment, the frequency synthesizer includes an input terminal and an output terminal, a loop filter, a digital phase detector, and an analog phase detector. The digital phase detector includes a first input coupled to the input terminal, a second input coupled to the output terminal, and an output coupled to the loop filter, the digital phase detector is configured to operate at a first phase comparison frequency. The analog phase detector includes a first input coupled to the input terminal, a second input coupled to the output terminal, and an output alternating current (AC) coupled to the loop filter, the analog phase detector is configured to operate at a second phase comparison frequency. The first phase comparison frequency is different from the second phase comparison frequency.
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Chang Joseph
K & L Gates LLP
Shin Jeffrey
Teledyne Wireless, LLC
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