Help me answer questions about 555 circuit resonance

[johntee]

Hi,

I've posted a basic circuit on my NTL homepage and need some help with it.
Would a forum member take a look and maybe help answer my questions on the webpage. Here's the link:

**broken link removed**

Many thanks, I'm a novice on electronis but trying to learn a little each day.

John

 

[A.Anand Srinivasan]

Re: Circuit resonance

your MOS would be driven by a square wave and hence the LC would pass that resonant frequency component alone if L and C are in series and if in parallel all the other frequency components(square wave has all frequency sine waves)....

the diode D3 will clip your output to around 11.3V....
the radiated strength can be talked about only with respect to the saturation point of the magnetic core.....
it can be done...
the coil itself is a inductor and hence there wont be big change in the output waveform....

 

[johntee]

Circuit resonance

Thanks for your reply, on the basis of your responce am I correct in saying that if an oscilloscope was placed across the inductor coil it would show square waves in a parallel L & C configuration? Would this still be the same waveform if inductor (L) and capacitor (C) were at resonance?

Sorry I don't have access to a Scope and such

Regards,
John

 

[A.Anand Srinivasan]

Re: Circuit resonance

ya but not a perfect square wave..... but at resonance the wave would be a sine...

 

[johntee]

Circuit resonance

Thank you once again for your valueable help, it is very much appreciated. I hope that in the future, when my knowledge of electronics has matured, I will be able to help others as you have helped me.

Kindest regards,

John in the UK