In this case it´s not gated, it is lineary controlled - page 1 from the datasheet I mentioned:
The overlimit inhibitor is just the zener, which makes sure it doesn´t compress the signal too much.
I am about to buld this preamp, so I am first trying to know how to troubleshoot it - what to measure, and also to know how it works.
The overlimit inhibitor is just the zener, which makes sure it doesn´t compress the signal too much.
I am about to buld this preamp, so I am first trying to know how to troubleshoot it - what to measure, and also to know how it works.
" ...The overlimit inhibitor is just the zener, which makes sure it doesn´t compress the signal too much. I am about to buld this preamp, so I am first trying to know how to troubleshoot it - what to measure, and also to know how it works. ..."
That Schmidt Trigger (U8A) is definately serving a "digital" function, shutting down the CA3080 in a "snap action", latching methodology. ( http://en.wikipedia.org/wiki/Schmidt_trigger )
I might have chosen a different pre-amp design ... but ... to each his own purpose. Go for it!
That Schmidt Trigger (U8A) is definately serving a "digital" function, shutting down the CA3080 in a "snap action", latching methodology. ( http://en.wikipedia.org/wiki/Schmidt_trigger )
I might have chosen a different pre-amp design ... but ... to each his own purpose. Go for it!
Does this look familiar? ... http://en.wikipedia.org/wiki/Image:Opampschmitt_realistic_xcircuit.svg
🙂
🙂
But it is not a schmitt trigger..., If you have some simulation program then use it and you will see the output of the amp moves slowly, and the output to the CA3080 has of course 10-2*V_forvard of the two diodes, and the current changes slowly from 1uA to 2.1mA with input form -10mV to -12V.
The graphs before were incorrect, because I didn´t simulate it with the load connected- two diodes in series.
The graphs before were incorrect, because I didn´t simulate it with the load connected- two diodes in series.
- Status
- Not open for further replies.