| Home | Terms of Use | Site Map | Contact Us |
IndustryCommunity.com > Electrical and Electronic Community > Analog Circuit Design Forum > Message
Main Menu
Find

[ List Subjects ][ Main Page ]
[ View Followups ][ Post Followup ]

Subject: Re: i need circuit diagram about FSK

Date: 04/20/03 at 9:55 PM
Posted by: Russ Kincaid
E-mail: russlk@netzero.com
Message Posted:

In Reply to: i need circuit diagram about FSK posted by yvonne on 04/20/03 at 12:49 AM:

The phase lock loop can be used both as modulator and demodulator. National Semiconductor Application Note AN-46 is a good tutorial on PLL and has some practical demodulator circuits. To make a modulator, feed a fixed oscillator into the phase detector, use a summer to add the control signal to the VCO, and take the output from the VCO.

You will find this ap note plus others at this URL: http://www.national.com/apnotes/Analog-Comparators__v1.html


Follow Ups:


Post a Follow-up:

Name:
E-Mail:
Subject:

Message to Post:

 

1999-2001 Sunlit Technology Co., Ltd. All rights reserved.