根据本发明的特定的实施例，合成器237可结合射频锁相环或中频锁相环或两者的组合。
Depending on the particular embodiment of the invention, synthesizer 237 May incorporate an RF PLL or an IF PLL or a combination of both of these components.
仿真结果表明，该锁相环频率综合器达到了设计指标，可以应用于两次变频的“宽带中频”集成接收机。
The simulation results show that the designed PLL frequency synthesizer meets the design specification and it can be used in the integrated wideband if with double conversion wireless RF receiver.
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