Design Of the phase-locked frequency synthesizer with the fine performance
Weidong Geng · Microcomputer Information · 2008
The article proposes a method of design and realization in view of the phase-locked frequency synthesizer with the fine performance. Each part of this kind of phase-lock frequency synthesizer has all carried on the optimized design. The phase detector has joined the phase reverser chain to take out the input signal border in order to eliminate the death area of PD. The charge pump has used the differential circuit structure to eliminate the jump phenomenon. The voltage controlled oscillator has used the structure of current-controlled delay to obtain the fine performance. In particular,the frequency divider has used in and out two frequency-divider structures,Through to change the N and M value which is the multiple frequency,we may synthesize many kinds of clock frequencies.