10khz wein bridge oscillator

[dbanner]

I need a 10khz oscillator circuit which doesn't use a thermistor or lamp. Based on a TL071 opamp.

[Andi68]

Maybe you could find something here

Sinus-Oszillatoren mit Operationsverst?rkern - PDF Kostenfreier Download (docplayer.org)

Microsoft Word - NF-Doppelton-Generator mit Wien-Robinson-Br?cke_20.12.2016_1.docx (darc.de)

[dbanner]

Here's the schematic for a simple inductance meter.
I have an old analog meter which has no purpose, so I thought it could be put to some use as a backup test instrument for measuring coils.
Problem is the thermistor.
I need to modify the oscillator.

[Vadim18]

Here's the schematic for a simple inductance meter.
I have an old analog meter which has no purpose, so I thought it could be put to some use as a backup test instrument for measuring coils.
Problem is the thermistor.
I need to modify the oscillator.

Try Twin-T oscillator

https://www.electronics-tutorials.ws...scillator.html
Twin-T provide more clean sine wave than RC shift type oscillator

[dbanner]

Thanks all for your suggestions. Yes, perhaps I could try various circuits.
I modified the original oscillator circuit from the schematic by putting two anti-parallel 1N4148 diodes and a resistor in place of the thermistor. This modification I saw on another circuit. It seems to work well in Ltspice. I'll try to build the circuit. Main thing is stable for output loading. On the simulation I get [email protected]. that should be good enough.(The article states 10kHz@ about 1V)

[dbanner]

I constructed my little circuit on a small perfboard.
Now only to test it out and compare results to see how good or badly it performs. I don't expect much.

[dbanner]

Well, my little circuit doesn't want to oscillate. I double checked everything, and isolated it from the rest of the circuit, but nothing. I use half of TL062 opamp. I tried other TL062, still nothing.
It must oscillate, it has to. Maybe feedback resistor is wrong value, I'll try a little trimmer in it's place.
But before I go down the rabbit hole, let me verify that I don't have a fake chip. I should've checked this at the outset.

[dbanner]

It's alive. The circuit works.
It's working quite well, initial testing shows good results, need to calibrate with 1mH inductor FSD. The meter moves smoothly up and down the scale. There are no overshoot or erratic movement. That's good.
I intend to keep it at 1mH range only as a quick spot check meter when winding coils for PI machine.
The oscillator runs a bit low, @8.56kHz. I want to get it to run at 10kHz so I'll have to tweak with it a bit.
That's it for now, eventually I'll put some pics after I dress it up in a project box.
On to next project.

[dbanner]

I forget to mention, I build all from junk parts. As KT315 would say...." Trash technology"