From: agodwin@acorn.co.uk (Adrian Godwin) Subject: Re: Single chip receiver for FSK? Organization: Acorn Computers Ltd, Cambridge, UK Lines: 26 In article jra@law7.DaytonOH.NCR.COM (John Ackermann x 2966) writes: >My goal is to come up with an inexpensive design for a receiver "back >end" with IF input on one end and an FSK demondulator on the other. I'm >particularly interested in ways to use a higher IF than 10.7 -- do any >current chips work up to, say 150MHz with internal downconversion so a >normal IF filter can be used? > GEC/Plessey specify a series of FM demodulators (SL1454 etc) for use in satellite TV receivers : 150 or 600MHz in, 10MHz of baseband video out. I think there's also a related data slicer / clock recovery circuit intended for use in DMAC decoders, though that isn't used in the most common implementation - it may not be in volume production. The most easily available components probably vary with local satellite standards, and I think the european systems vary rather widely from those in the US - so it may be worth investigating locally-available receiver designs to find out what's in common use. -adrian -- Adrian Godwin : agodwin@acorn.co.uk : adrian@fangorn.demon.co.uk : g7hwn@gb7khw ObDisclaimer : I believe this rubbish .. don't imagine that anyone else does.