Frequency synthesizer using digital pre-distortion and method

Details Frequency synthesizer using digital pre-distortion and method Frequency synthesizer using digital pre-distortion and method

2006-07-11

2006-07-11

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

C332S128000

Reexamination Certificate

active

07075376

ABSTRACT:
A method includes identifying a setting for a capacitor bank associated with a voltage-controlled oscillator in a closed-loop phase-locked-loop. The setting represents a combination of one or more capacitors in the capacitor bank. The method also includes estimating a gain introduced by the closed-loop phase-locked-loop when the oscillator operates using the identified setting. The method further includes estimating a response of a loop filter in the phase-locked-loop and identifying one or more coefficients for a digital filter using the identified gain and the identified loop filter response. The digital filter is operable to filter an input signal. In addition, the method includes modulating the filtered input signal using the phase-locked-loop to produce an output signal.

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patent: 6172579 (2001-01-01), Dacus et al.
patent: 2004/0151257 (2004-08-01), Staszewski et al.

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