I was wondering about that. The SAW resonators I've seen so far don't have very high Q but I haven't done a lot of research on them. I was reading Intro to RF Design last night looking for some more insight on oscillators and noticed that phase noise was inversely proportional to Q^4. So thought that SAW oscillators might be noticeably noiser than a XTAL oscillator close in.
Of course since the frequencies seldom overlap it would be comparing apples to oranges. The only XTAL oscillator implementations I've seen at SAW frequencies have been based on filtering the output to pick off highorder distortion products. I would imagine that such an approach magnifies any phase noise present by at least the order of the distortion product; probably worse. Has anyone got some references to SAW oscillator phase noise measurements? FWIW, Digikey has some ECS SAW resonators at 400Mhz for $3.50 or so each. I'll probably buy some just to play with. Of course now I need to get a faster scope...I thought a TEK475 was going to be plenty. Silly me. Any suggestions for a supplement for highspeed logic work? 73 jim ab3cv ----- Original Message ----- From: "FRANCIS CARCIA" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, April 16, 2006 6:35 PM Subject: Re: [soft_radio] Re: SDR Basics A good SAW oscillator will do 500 mHz. with the same performance as a crystal oscillator. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
