Calibration techniques for frequency synthesizers

Details Calibration techniques for frequency synthesizers Calibration techniques for frequency synthesizers

2002-03-06

2009-06-09

Nguyen, Tony T. (Department: 2618)

Telecommunications

Transmitter

Including tuning

C455S164100, C455S183100, C455S260000

Reexamination Certificate

active

07546097

ABSTRACT:
In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of noise. In particular, the frequency synthesizer may include a phase locked loop (PLL) and an integrated voltage controlled oscillator (VCO). The frequency synthesizer may implement one or more calibration techniques to quickly and precisely calibrate the VCO. In this manner, the analog gain of the VCO can be significantly reduced, which may improve performance of the wireless communication device. Also, the initial state of the PLL may be improved to reduce lock time of the PLL, which may enhance performance of the wireless communication device.

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