Rapidly-adaptive all-digital phase-locked loop and design method thereof
An all-digital phase-locked loop, self-adaptive technology, applied in the field of electronics, can solve the problems of increasing phase jitter, compromise, system stability deterioration, etc. Effect
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[0030] The technical solution of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0031] 1. Design of digital phase detector
[0032] figure 1 It is a structural schematic diagram of a fast adaptive all-digital phase-locked loop. An adaptive controller is added to the all-digital phase-locked loop, and the circuit structure of the digital phase detector and digital filter is improved, so that the phase-locked loop can dynamically change according to the change of the input signal frequency and the phase difference of the input and output signals. Adjusting the control parameters improves the phase lock speed, expands the phase lock range, and enhances the stability of the phase lock system. It overcomes the defects caused by the traditional all-digital phase-locked loop control parameters are fixed and cannot be dynamically adjusted.
[0033] figure 2 The structure diagram of the digital phase detector. I...
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