Then an improved CMOS Gilbert double-balanced mixer topology based on bulk-driven is chosen by comparison of several kinds of mixer topologies in common use.

• 然后介绍了目前常用的几种混频器结构,包括单端结构、单平衡结构、双平衡结构等,分析各种结构的优缺点,针对所要设计实现的单片RF混频器,选择双平衡Gilbert型CMOS混频器结构。