Phase adjusting method and device thereof

Abstract

The invention discloses a method of phase adjustment: a processor receives a control order, and according to the order, a time interval generator is controlled to generate a frequency shift keying control signal and the value of a frequency control word of a direct digital frequency synthesizer is configured. The time interval generator transmits the frequency shift keying control signal to control the direct digital frequency synthesizer to choose the frequency control word, and the direct digital frequency synthesizer adjusts the phase of the input clock signals according to the frequency control word chosen and the value of the frequency control word. The invention also discloses a phase adjustment device, which comprises a processor, a time interval generator and a direct digital frequency synthesizer. By using the invention, the phase adjustment accuracy of the clock signals is substantially enhanced; therefore, the stability and the reliability of the work of the system are greatly improved.

Description

technical field [0001] The present invention mainly relates to the field of electronic communication, in particular to a method and device for phase adjustment. Background technique [0002] In the field of time-frequency application and time-frequency measurement and control, designers often need to finely adjust the phase of clock signals in various parts of the circuit system to ensure the reliability of the entire circuit system. At present, common phase adjustment methods include delay line method and phase locked loop method. in, [0003] The delay line method is a method of delaying an electrical signal for a period of time through a delay line circuit. The delay line circuit should have flat amplitude-frequency characteristics and certain phase shift characteristics or delay frequency characteristics in the passband, and have appropriate matching impedance and small attenuation. [0004] The phase-locked loop method is a method of adjusting the phase of the clock ...

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Problems solved by technology

[0006] However, both of the above two phase adjustment methods have certain defects. Among them, the delay line method is difficult to accurately control the size of the phase adjustment, and the phase-locked loop method adjusts the output signal phase by changing the initial phase, so the adjustment accuracy is not high.

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