Connect with us

FM IF strip ICs

Discussion in 'Electronic Design' started by Phil Hobbs, Mar 5, 2007.

Scroll to continue with content
  1. Phil Hobbs

    Phil Hobbs Guest

    All my old favourite FM IF ICs seem to be either discontinued (MC1356,
    MC13155), hard to get, or cost $5 (SA605). Any suggestions for a nice
    hackable 2-stage limiting IF amplifier/RSSI chip with at least 20 MHz IF
    bandwidth, preferably one that gives me the limiter output directly?

    Thanks,

    Phil Hobbs
     
  2. Philips SA636. Just don't use the mixer.

    Thanks,

    Frank
     
  3. Phil Hobbs

    Phil Hobbs Guest

    What's wrong with it? Too weak?

    Cheers,

    Phil HObbs
     
  4. Joop

    Joop Guest

    He probably means "just use the IF section".
    Though I doubt if the 636 would be much cheaper than the 605. The 615
    might be worth to look for too. Same as 605 with somewhat lesser
    specs.

    Joop
     
  5. The OP might also try the NEC upc3217 / 18
    http://www.cel.com/pdf/datasheets/upc3217g.pdf
    No RSSI, but 50-55 dB on the ACG. I use it in DSP radios as the preamp
    before the ADC.

    Frank Raffaeli
    http://www.aomwireless.com/
     
  6. Phil Hobbs

    Phil Hobbs Guest

    Thanks for the steer. One fairly weird thing about these: they're much
    noisier for high gains (NF = 13 dB @ 23 dB gain, NF = 6 dB @ 4 dB gain).
    I'd expect them to be quieter at high gains, like every other AGC amp
    I've ever seen. Are there parallel signal paths or something? I can't
    think how you'd make a single-path circuit do that. Weird.

    Cheers,

    Phil Hobbs
     
  7. Dear friend :
    It is my fortunate writing to you . you will discover this is a wealth
    accumulation place.
    The website of our company is http://www.china-powerseller.com
    We are a big agent for Laptop
    Mobile Phone\Digital Camera\CDJ\DJM\Apple Ipod\PSP\VEDEO GAMES
    \Television\GPS\Telescope in CHINA .
    All of our commodities is the most advanced quality but lowest price.
    we also have the

    safest and most
    convenient transaction way to guarante the transaction arries on
    normally .
    looking forward to your coorporation and cause all of us both to
    profit.
    you can contact us by Email:china.seller#hotmail.com
    MSN: china.seller#hotmail.com
    best wishes!
    your sincerely

    http://www.china-powerseller.com
    MSN/Email:
     
  8. Guest

    We are using the SA605 right now and like it so far. There are good
    application notes for it, but it is about 10 years old so I think no
    current support from Phillips. We are using it with two of the
    narrowest ceramic filters from Murata (CFWLA455KJFA - available from
    Mouser). We are tapping right off the limiter output, but it is high
    output impedence, so be careful of that (different loads affect the
    RSSI reading!). No evalauation boards exist, good layout is important.

    Another options are the chips from New Japan Radio Company. Search
    under "NJM" in Digikey. Samples online are possible from manufacturer,
    but take a few weeks to get.

    BenL
     
  9. Paul Mathews

    Paul Mathews Guest

    Analog Devices AD608?
    Paul Mathews
     
  10. Dear friend :
    It is my fortunate writing to you . you will discover this is a wealth
    accumulation place.
    The website of our company is http://www.china-powerseller.com
    We are a big agent for Laptop
    Mobile Phone\Digital Camera\CDJ\DJM\Apple Ipod\PSP\VEDEO GAMES
    \Television\GPS\Telescope in CHINA .
    All of our commodities is the most advanced quality but lowest price.
    we also have the

    safest and most
    convenient transaction way to guarante the transaction arries on
    normally .
    looking forward to your coorporation and cause all of us both to
    profit.
    you can contact us by Email:china.seller#hotmail.com
    MSN: china.seller#hotmail.com
    best wishes!
    your sincerely

    http://www.china-powerseller.com
    MSN/Email:
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-