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需要锁定2MHz的信号，TI公司有哪些锁相芯片可以实现？
TI的锁相环芯片多的很。http://www.ti.com.cn/lsds/ti_zh/clock-and-timing/single-loop-pll-products.page?paramCriteria=no#p1099min=0;0.001
