Wein Bridge

Thread Starter

Zeeus

Joined Apr 17, 2019
597
TS tried for some time
Think he understands circuit (a bit)

When no current is supplied to the NPN then it is off so JFET's gate is at 0v (it must be 0 (or < diode drop) or it contradicts JFET hence it's drain is at 0 too), turning it on fully.
When current to NPN then JFET reversed biased

Missed it?
Aslo, the diode with the PNP is just to protect the transistor?

Also, kindly make work on Spice

Thanks thanks
 

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Thread Starter

Zeeus

Joined Apr 17, 2019
597
Why TS did not use the recommended values? But decided to change the component values?
Also why TS pick such a complicated circuit?
TS is reading from book and following sequentially
He is testing understanding

Already tackled your circuit but thanks
 

Jony130

Joined Feb 17, 2009
5,176
So what is the advantage over this "classics" version with just one JFET plus linearization resistors and the diode peak detector?
 

Thread Starter

Zeeus

Joined Apr 17, 2019
597
Will ask the author but for TS,

About seeing different circuits doing the same thing.
Someday, will see the JFET and bJT connected like that or similar in another ciruict and will quickly understand
 
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