Is Reverse Charging in an Oscillatory Circuit with a Diode Useful?

  • Thread starter Thread starter Rabin upadhaya
  • Start date Start date
  • Tags Tags
    Circuit Diode
AI Thread Summary
In an LC circuit with a diode, oscillation ceases after one cycle due to the diode's unidirectional conduction, which prevents the capacitor from recharging effectively. The reverse charging of the capacitor occurs but is limited in utility since the energy dissipates quickly when the diode is on. Users suggest that while the reverse charging process can be foundational for certain circuits, it does not support sustained oscillation. A properly configured circuit could potentially generate both positive and negative voltage supplies, but clarity on circuit design is essential for effective discussion. Overall, the inclusion of a diode in an LC circuit significantly alters its behavior and efficiency.
Rabin upadhaya
Messages
8
Reaction score
0
The LC circuit should oscillate with its natural frequency in absence of any external agent and the energy is alternatively converted from electrical to magnetic.Suppose that i include a diode in this circuit that acts as a switch.Now the capacitor is completely discharged while diode in on state.
The oscillation stops after one cycle because the diode is not a two way conduction switch.During the previous process the capacitor gets reverse charged.
Can this reverse charging process be useful in any circuit?
 
Engineering news on Phys.org
Rabin upadhaya said:
The LC circuit should oscillate with its natural frequency in absence of any external agent and the energy is alternatively converted from electrical to magnetic.Suppose that i include a diode in this circuit that acts as a switch.Now the capacitor is completely discharged while diode in on state.
The oscillation stops after one cycle because the diode is not a two way conduction switch.During the previous process the capacitor gets reverse charged.
Can this reverse charging process be useful in any circuit?

Welcome to the PF.

Could you please post a circuit diagram? It is hard to understand your question without more information. Thank you.
 
Sorry i do not have a circuit diagram for this but i consider using any of the oscillator circuit with a diode.
 
Rabin upadhaya said:
Sorry i do not have a circuit diagram for this but i consider using any of the oscillator circuit with a diode.

draw a diagram in MSPaint or some other graphics prog and post it here
That way we can see clearly what you are trying to work out
As Berkeman said, you are really not supplying enough info for anyone to give you a decent answer

cheers
Dave
 
I have tried to draw the circuit please check the attachment.
 

Attachments

  • Untitled.jpg
    Untitled.jpg
    6 KB · Views: 461
Last edited by a moderator:
That is useful in that it's the basis for many circuits. If you have two of these, but one with the diode reversed, you will be able to generate both positive and negative voltage supplies.

As the load typically draws off charge, the capacitor discharges a bit, and can then be topped up on later cycles.
 
If you put a diode in the circuit of an LC resonator, it will not 'oscillate' for more than one half cycle. The diode will cause the energy to dissipate very rapidly bu introducing a very low R during its 'on' interval.
PS That diagram you drew is an RC and not an LC circuit. Which did you mean?
 
This is an LC circuit.
 
Thank you for your generous help.
 

Similar threads

Back
Top