Junior Member level 3
Yes. If a voltage divider uses a resistor, why cannot we use a negative resistance components like tunnel diode to get the voltage amplification.Clarify me.
the voltage amplification effect would certainly happen in the LCR circuit. but the input should be AC at the resonant frequency. also, the voltage increases but the current decreases so we still can't get power amplilfication. voltage amplification of dc signal using passive component is something I never heard before. maybe someday there will.... who knows?aryajur said:Consider a passive LCR circuit, this circuit is a voltage divider at most frequencies but at the resonant frequency w=1/√(LC) the voltage across L or C would be an amplified voltage. So this is like a voltage divider at 1 frequency and a voltage amplifier at 1 particular frequency.
Consider the values of components:
R = 10Ω, L=1mH, C=1nF and Vac=100V
then calculate the voltage across the inductor in steady state at a freuqncy of 1 KHz and 1MHz you will see how that happens.