---
+ Post New Thread
Results 1 to 10 of 10
  1. #1
    Advanced Member level 1
    Points: 4,605, Level: 16
    grittinjames's Avatar
    Join Date
    Jun 2006
    Location
    bangalore india
    Posts
    484
    Helped
    43 / 43
    Points
    4,605
    Level
    16

    rc resonance

    hai

    i like to know working of rc resonence ocillator circuits

  2. #2
    Junior Member level 1
    Points: 1,484, Level: 8
    gnjus's Avatar
    Join Date
    Dec 2005
    Location
    Hrvatska (Croatia)
    Posts
    14
    Helped
    7 / 7
    Points
    1,484
    Level
    8

    resonance circuit

    Same as Hartley and Colpitts oscillators... Basically idea is to create sufficient phase shift.
    (The Barkhausen condition: if there is positive feedback with a phase 0 or 360 degrees, you will get oscillation).



    •   Alt2nd January 2008, 00:42

      advertising

        
       

  3. #3
    Advanced Member level 5
    Points: 17,526, Level: 32

    Join Date
    Oct 2005
    Location
    India
    Posts
    1,804
    Helped
    256 / 256
    Points
    17,526
    Level
    32

    rc circuit resonance

    if there is positive feedback and the feedback given is equal to input then oscillation can be achieved... at a particular frequency the RC or any other resonant circuit used would satisfy this condition and at this frequency the circuit oscillates....



  4. #4
    Full Member level 2
    Points: 1,685, Level: 9

    Join Date
    Jul 2006
    Posts
    121
    Helped
    9 / 9
    Points
    1,685
    Level
    9

    resonant rc circuit

    it works on Barkhausen Criteria



    •   Alt2nd January 2008, 22:38

      advertising

        
       

  5. #5
    Advanced Member level 1
    Points: 4,605, Level: 16
    grittinjames's Avatar
    Join Date
    Jun 2006
    Location
    bangalore india
    Posts
    484
    Helped
    43 / 43
    Points
    4,605
    Level
    16

    rc resonant

    thanks for responds

    i hear a fully charged capacitor if short to a inductor it will start damping resonance with out any other component

    i like to get expla for this



  6. #6
    Full Member level 3
    Points: 2,238, Level: 10

    Join Date
    Dec 2007
    Location
    Chennai-India
    Posts
    169
    Helped
    24 / 24
    Points
    2,238
    Level
    10

    resonance rc

    hi,

    there is one more condition for oscillation which the gain of the amplifier section (without considering feedback)has to be much much greater than 1 initially & finally gain should settle at a value greater than 1 to compensate the loss in the tank circuit.

    With Regards
    S.rajesh kumar



  7. #7
    Advanced Member level 5
    Points: 17,526, Level: 32

    Join Date
    Oct 2005
    Location
    India
    Posts
    1,804
    Helped
    256 / 256
    Points
    17,526
    Level
    32

    r c resonance

    the charged cap due to the charge passes current through the inductor and the inductor stores the energy as magnetic energy until the capacitor is able to supply current after that the inductor charges the cap and converts its stored energy to electrical energy... this repeats but due to some parasitic resistance some energy is dissipated leading to damped oscillations...



  8. #8
    Advanced Member level 2
    Points: 5,970, Level: 18

    Join Date
    Nov 2004
    Location
    Tamilnadu
    Posts
    657
    Helped
    36 / 36
    Points
    5,970
    Level
    18

    rc resonance circuit

    Quote Originally Posted by A.Anand Srinivasan
    the charged cap due to the charge passes current through the inductor and the inductor stores the energy as magnetic energy until the capacitor is able to supply current after that the inductor charges the cap and converts its stored energy to electrical energy... this repeats but due to some parasitic resistance some energy is dissipated leading to damped oscillations...
    it is RC resonance ....i mean RC phase shift oscillator then where comes inductor ..what u stated hold true for LC oscilltor....reply soon



  9. #9
    Advanced Member level 5
    Points: 17,526, Level: 32

    Join Date
    Oct 2005
    Location
    India
    Posts
    1,804
    Helped
    256 / 256
    Points
    17,526
    Level
    32

    how does a circuit resonant without inductor

    Quote Originally Posted by grittinjames
    thanks for responds

    i hear a fully charged capacitor if short to a inductor it will start damping resonance with out any other component

    i like to get expla for this
    electronics_kumar
    i've replied to this post of grittinjames... better read the post well before stating out mistakes....


    1 members found this post helpful.

  10. #10
    bas
    bas is offline
    Junior Member level 3
    Points: 1,462, Level: 8

    Join Date
    Mar 2006
    Posts
    29
    Helped
    4 / 4
    Points
    1,462
    Level
    8

    rc resonant circuit

    hi
    the answer is simple
    this type of oscillator works on the phase shifht
    one of the 2 conditions of the oscillation is to make the phase shift betwwn the output of the feedback circuit and the input of the amplifier zero
    this is why we put many cells of rc circuits



+ Post New Thread
Please login