LANSDALE Semiconductor, Inc.

ML12015, ML12016, ML12017

www.lansdale.com

Page 3 of 4

Issue A

Figure 1. shows a generic block diagram for connecting a prescaler to a PLL device

that supports dual modulus control. Application note AN535 decribes using a two-

modulus prescaler technique.By using

prescaler higher frequencies can be achieve

than by a single CMOS PLL device.

ML12015/16

/17

Figure 1. Generic block diagram showing prescaler connection to

PLL device

VCO

Loop Filter

Prescaler

PLL

ML145146

ML145158

ML145159

Fout

Fin

MC

MC in