Design and Realization for 2FSK Circuit Based on PLL
Shouzhao Jing · Modern Electronics Technique · 2007
The modulator is a part of the communication system.We can get FM signal by a modulator which based on PLL.The stabilization of its carry frequency is as high as an oscillator.The advantage is that it can be used to design an actual circuit with fewer device and lower power assumption.This article provides a good method to realize the 2FSK with LMX2326.So you can get some useful information from the paper.