I'm trying to allow my amplifier output stage to have variable operating points without the need to manually change resistors.
I think I've got it figured out for the input stage but the output stage is another matter.
For a WCF I'm thinking of putting a CCS on the cathode and a CVS on the anode, the CCS setting the current and the CVS setting the voltage. Unfortunately it's not working out the way I'd hoped.
The far left is the original circuit, the middle is the CCS on cathode and the far right is the CVS. Everything is dandy until I change the amplitude of the signal then everything gets thrown off.
What am I missing? Why does a change in AC amplitude screw over the operating points?
I think I've got it figured out for the input stage but the output stage is another matter.
For a WCF I'm thinking of putting a CCS on the cathode and a CVS on the anode, the CCS setting the current and the CVS setting the voltage. Unfortunately it's not working out the way I'd hoped.
The far left is the original circuit, the middle is the CCS on cathode and the far right is the CVS. Everything is dandy until I change the amplitude of the signal then everything gets thrown off.
What am I missing? Why does a change in AC amplitude screw over the operating points?
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