Discrete cfp (op-)amp

[homemodder]

Hi Nelsonvandal

Any chance of you posting the ltspice files for those opamps. I am also interested in the workings of some of those. Would save me a lot of time.
Regards
Alex

 

[MrMajestic]

If there will be a group buy for "Diamante", I'm going to try AD829 on that PCB.

Patience my dear Nelson, patience 😉

 

[Onvinyl]

If this circuit would work, which is a spin off of a topology of Tietze/Schenk, we had a balanced-SuSy-current-feedback-input stage for MC (phono) with THD to die for.
But I fear the DC-biasing won't be close to the simulation nor stiff enough in reality. Bandwith (-3dB point) sims 1.2MHz, gain is 41 dB
In sim, there is virtually *no* current or voltage through/over V3 (the MC-cart).


Rüdiger

 

[nelsonvandal]

Hi Nelsonvandal

Any chance of you posting the ltspice files for those opamps. I am also interested in the workings of some of those. Would save me a lot of time.
Regards
Alex

I don't know how to post such files. I'll post them if you help me.

 

[homemodder]

Hi nelsonvandal

The best is to save them all together in a zip file and then post them here. After you have created zipfile with a name, to post it you just attach the file with your reply. Youll see this option below the *your reply* and *options*.Just click browse and then point it to zipfile you have, when attached just reply as normal msg.
Hope this helps

Alex

 

[Onvinyl]

I build the circuit from post #23 and it indeed hasn't stable DC Bias. Initially, it's ok, but when applying a signal, it sucks more and more current. I give it a rest.
Rüdiger