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Issue A

LANSDALE Semiconductor, Inc.

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Figure 2b shhows a generic block diagram of connecting a prescaler to a PLL device that

supports dual modulus control. Application note An535 describes using a two–modulus

prescaler technique by using prescaler higher frequencies can be achieved than by a

single CMOS PLL device

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Figure 2b Generic block diagram showing prescaler connection to

PLL Device

VCO

Loop Filter

Prescaler

PLL

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Fout

Fin

MC

MC in