Hi, in a Series RCL circuit using DC pulse, does the duty cycle has to be 50% so as to achieve resonance? And will there be a high voltage across the inductor and capacitor when resonance reached? Kindly advice..
Cheers..

 

No - any energy at the right frequency will cause resonance. You might find our Ebook informative - http://www.allaboutcircuits.com/vol_2/chpt_5/2.html.