automatic resonance tuning

Discussion in 'General Electronics Chat' started by samjesse, Apr 16, 2012.

  1. samjesse

    Thread Starter Active Member

    Sep 14, 2008
    202
    0
    Hi

    Is there a way to come up with a circuit design in order to achieve automatic resonance tuning? – i.e.

    Given a polarized capacitor with varying dielectric permittivity in a LC circuit, A portion of the energy is amplified and feedback in phase to sustain oscillation, maybe like this preemptive "Please see image”.

    thx

     
  2. panic mode

    Senior Member

    Oct 10, 2011
    1,320
    304
    any LC osc. will do it's best to oscillate a resonant frequency.
    if there is some deviation, it is due loading of the LC circuit itself by parasitic capacitances from the circuit etc.

    now about your circuit - what are you trying to do? why is there diode? why is capacitor polarized? what frequency you expect?
     
  3. samjesse

    Thread Starter Active Member

    Sep 14, 2008
    202
    0
    My circuit is only a brain dump and not to be read as a credible setup, "still learning".
    The DC supplied will be pulsed initially and then the "closed loop" feedback circuitry takes over and tunes the frequency. The Diode is to maintain the capacitor from discharging.
     
  4. panic mode

    Senior Member

    Oct 10, 2011
    1,320
    304
    how do you expect to get resonance if there is something preventing discharge?
     
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