Design of Wide Band Frequency Synthesizer in Frequency Hopping Source

摘要

A PLL range from 109.568MHz ~ 193.536MHz for frequency hopping source was designed by using digital PLL chip ADF4110. The frequency step is 1.024MHz, hopping time is less than 95us. Band side spur at 1.024MHz is better than -79dBc, phase noise is better than -97dBc/Hz (@10KHz). Long time frequency stability is 1 ppm.