I am considering buying these tunnel diodes(https://www.ebay.com/itm/3153614233...CJrRLcUrVKQuTCbSXvPUV7Kw==|tkp:Bk9SR6rU3Yy7ZQ) because I have a circuit in mynd in particular this:


If the capacitor is stored with some initial voltage at t=0 then the circuit would oscillate indefinitely,without the need of external power supply.This happens because when we entered the negative differential resistance region of the diode,the voltage of the inductor would flip polarities comparing to the case of a simple RLC circuit and it will charge the capacitor while charging itself so there is now power loss,right?

The double tunnel diodes oppositely loaded to each other is to make sure we have the NDR of one of the 2 diodes in both half-cycles.

 

Is there a logical error in my reasoning?

 

Is there a logical error in my reasoning?

That the negative resistance region of the tunnel diode exists over its entire operating voltage range.

 

Is there a logical error in my reasoning?

That negative resistance gives "free" energy for something to oscillate indefinitely, without the need of external power supply.



It's just a slope in some of the device I/V curve. The slope can have gain (as a voltage controlled current device) in a two terminal device much like a transistor can as a three terminal device. They are both active (dynamic) devices, need external power to operate (oscillate) and have losses that will require external power to continue to operate.

 

Is there a logical error in my reasoning?

Yes.
What about the power loss in RL?
The tunnel diode can't generate energy out of nothing.

 

Since the primary behaviour of a resistor is to convert current through it into heat, your circuit by design is going to lose energy very rapidly. Hence it cannot oscillate for long, if at all. The other components have resistive inefficiency that contribute to the loss, even the wires!

 

In the same vein, the thread title is incorrect: an RLC circuit with 0 dampening, or its reciprocal an infinite Q, cannot exist in the real world.