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Differtial amplifier simulation with AC signals.

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I believe sys_eng missed yet the text book chapters about reasonable amplifier circuit bias and selection of transistor area.
 

FvM said:
I believe sys_eng missed yet the text book chapters about reasonable amplifier circuit bias and selection of transistor area.
Click to expand...

That's a bit too crytic.
I have put up all those diagrams, we can pinpoint where specifically wrong on the diagram.
We don't need textbook at this point.
 

The circuit has two problems:
- inifinite load resistance
- not biased for an output DC voltage inside the achievable output swing
 

FvM said:
The circuit has two problems:
- inifinite load resistance
- not biased for an output DC voltage inside the achievable output swing
Click to expand...

1) ok, I add an inverter at output , nothing changed.
amp_simul11.png

2) I put 2VDC at the gate of intput, that's normal working voltage for transistor. If not 2V, what do you suggest?
 

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