Hello, i need a little help with inductor used in jfet

Hello can somebody help, what do the inductor L1 is to stop high frequency of wat, this is circuits

 

Thank you very much…..Have a nice wekend.

 

O sory, can you just tell me where discharege

O Duke i have some question, i search on the internet, to find how the circuits works, but i did not find something like this………..is possible to describe how work the circuit please

 

I take from that book, but he dont explain, only that gate drain is configuret Q1 and Q2 Q3 source follower, Q2 is coupled via 22p and back to stage Q1, 18Ω resistor is to stop parastic oscillacition, more not, i still dont understand, for that i ask help, just little bit how it works.

 

Duke i will like just to know how charge and discharge L1 and C just that i want to know thnx

 

Thats is right LC charge and discharge i know, but i never see something like this circuit, but like Duke say, after is feedback Q1 thrugh Q2, because i never use fet transistor, for that its new for me. and Q3 get signal from Q2 right? of not…..and Q3 is output?

 

What is wrong, i dont understand, i dont know where is output...…….

 

Ah for that i ask , do i know of not., THANK YOU DUKE, have a nice day….