A study of technique of intelligent digital phase-locked frequency multiplier;

This paper introduces the working principle of the phase-locked loop circuit CD4046 and double D trigger CD4013,and gives the realization of phase-locked frequency multiplication based on CD4046 and CD4013 in automatic register controller syste

Aiming at the existing problem in harmonics measurement of power system,the paper(presented) a collecting method based on frequency multiplication phase-locked.

The tested part adopts a referenced command current optimize PWM detecting method based on signal s time domain vertical property,and high speed simulating switch is controlled by frequency multiplication phase-locked circuit and EPROM unit.

The paper, for the harmonics detection method used in Power system, presents an sampling method based on frequency multiplication phase-locked.

The new technology uses FPGA to achieve frequency multiplication phase-lock,with a new multi-cycle synchronous frequency method to track the frequency,and uses QUARTUSⅡto design.

The scheme was presented that adopting digital phase locking frequency modulation circuit to take the place of origin variode phase modulation circuit in order to stimulate the frequency modulation of quantum system signals , and it was pointed out that adopting digital servo circuit to replace origin analog compensation circuit .