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Wide band VCO

Discussion in 'Electronic Basics' started by Dummy, Nov 17, 2003.

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  1. Dummy

    Dummy Guest

    Just a thought.
    Is it possible to achieve very wide band frequency range by dividing
    or multiplying the sythesizer frequency? Let's say a PLL generates
    1Ghz - 1.5Ghz frequency. Maybe we could divide the frequency by 2 to
    achieve 500MHz to 750MHz or multiply by 2 to obtain 2GHZ - 3GHZ? And
    the divider is programmable.
     
  2. Yes.

    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.

    http://www.anasoft.co.uk/replicators/index.html

    Understanding, is itself an emotion, i.e. a feeling.
    Emotions or feelings can only be "understood" by
    consciousness. "Understanding" consciousness can
    therefore only be understood by consciousness itself,
    therefore the "hard problem" of consciousness, is
    intrinsically unsolvable.

    Physics is proven incomplete, that is, no
    understanding of the parts of a system can
    explain all aspects of the whole of such system.
     
  3. You can also use a higher frequency VCO and a mixer : For example you can
    find a 4-8GHz VCO, then mixing it with a fixed 4GHz frequency you got a
    0-4GHz signal... (with some filtering...)

    Cheers,
    Robert Lacoste - ALCIOM : The mixed signals experts
    http://www.alciom.com
     
  4. Bill Sloman

    Bill Sloman Guest

    You might want to look at YIG-tuned microwave oscillators

    http://www.elva-1.spb.ru/products/microwave/yig-osc.html

    where you can get a 4:1 frequency range. When I last looked, some
    fifteen years ago, these were bulky and expensive devices that used
    quite a lot of power, but they did offer a tuning range comfortably
    wider than the 2:1 you want to start feeding a chain of dividers, and
    the output is fairly clean, as tunable oscillators go.
     
  5. Dummy

    Dummy Guest

    Possible to get a frequency multiplier circuit or IC?
    If programmable divider can be programmed to 0.5, it would be equivalent to x2.
     
  6. Bill Sloman

    Bill Sloman Guest

    I don't know. I looked at the yig-based tuneable oscillators, but
    never got the chance to buy one and play with it. The URL I posted
    listed oscillators going appreciably above your area of interest, so I
    would have through that a frequency mutiplier would be unnecessary -
    if you can get a reasonably clean oscillator at the highest frequency
    you need, this should give you the least noisy, that is most
    jitter-free, outputs from your dividers at the lower frequencies you
    want.
     
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