Design and Realization of Fractional-N Synthesizer Based on ΔΣ Modulation Technology
Zhao Li · Electronic Warfare Technology · 2004
The phase noise in fractional-N synthesizer is analysed ,and the ΔΣ modulation technology which can eliminate phase noise is introduced.The hardware circuit of fractional-N synthesizer based on ΔΣ modulation technology by using CX72301 CMOS chip is also introduced, which worked in gigahertz frequency and acquired good performance of phase noise and switching time about several microseconds.