LC tank circuit at resonance

"lerameur"

Then measure from ground to the mid point.

...... Phil

HI Phil

I put the cap and inductor in series like you said and it does work, thanks, I get almost double the amplitude. But how do I make it work having the cap and inductor in parallel ?

"captoro" "Phil Allison" "lerameur"

I put the cap and inductor in series like you said and it does work, thanks, I get almost double the amplitude. But how do I make it work having the cap and inductor in parallel ?

Using a voltage source like you have will never work.

..... Phil

What are the component values for the L and C? Are you sure that your frequency generator range is covering the resonance frequency? (Be sure to distinguish between Hertz and Radians per Second).

Since you're driving the circuit with a (presumably) low impedance voltage source, that source is going to do its best to maintain its 5V across the circuit regardless of the circuit's impedance. Place a resistor in series with tank circuit to provide another place for voltage to be dropped, then sweep the frequency and measure the voltage across the tank.

By measuring the current rather than the voltage. Series LC amplifies voltage, parallel RC amplifies current.

Nobody, it's not quite correct to call this amplifcation. It's just energy storage. The L and C are storing energy from previous cycles.

George Herold

parallel LC acts like an insulator at resonnance and like a conductor elsewhere,

easiest way to see a peak at resonance is to put a resistor in the feed

R in ---/\\/\\/---+-----+----- out | | 3|| --- L 3|| --- C | | +-----+ | ----- /////