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Homework Help: Resonant ccts

  1. Sep 21, 2009 #1
    How find Q factor of this resonant amp cct.because "R" is not theare,
    cant apply " Q=( ωL/r) or =(Dynamic R/ωL) "

    Attached Files:

  2. jcsd
  3. Sep 21, 2009 #2
    The resonant tank is driven by a transistor current source which has some output impedance R
  4. Sep 23, 2009 #3
    Please tell me what is the R. how find that value?
  5. Sep 23, 2009 #4
    Since there is no collector resistor, the only output resistance comes from the transistor's collector to emitter junction. It depends on the transistor you use, but generally is about 50 K.
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