A high precision and low amplitude variation phase interpolation coding method for digital phase-modulated clocks
For digital phase-modulated clocks system,a phase interpolation coding method is proposed,which reduces the number of changing bits between adjacent phases,and decreases the phase error and the amplitude variation.Through the iterative idea,balancing the conversion relationship between the error caused by the control code hopping and the phase adjustment,as well as the influence of the control code towards the amplitude of the output signal,the circuit structure with smaller phase error is realized.The simulation results show that under this coding structure,the amplitude variation of the phase-modulated clock is less than 6％.
digital phase-modulated clocksphase interpolationcodinghigh precisionlow amplitude variation
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