【摘要】 介绍了一种采用MC145152实现的数字锁相环频率合成器,其输出频率范围为1420～1920MHz,频率步进为200kHz,相位噪声小于-90dBc/Hz,杂散抑制优于60dB,输出功率P0≥10dBm。该频率合成器在TCL-376型接力机上得以成功运用,运行稳定、可靠。更多还原

【Abstract】 A design method of a DPLL frequency synthesizer based on MC145152 is introduced.The output frequency range of the DPLL is from 1420 MHz to 1920 MHz; the frequency step is 200kHz; the phase noise is less than -90°dBc/Hz; the restrainability of miscellaneous noise is more than60 dB; and the output power is no less than 10 dBm. The frequency synthesizer is success applica-tion in TCL-376 relay machine, and can work stably and credibly.更多还原