As we know the non inverting amp can be biassed by putting out some current via a resistor(the easiest way) from the output to V-
I've been searching for a while(and I admit that my skill is so decent ) and can not find any information on biasing the inverting amp into (more) class A. So I'm afraid that this is doable or not? please help
I've been searching for a while(and I admit that my skill is so decent ) and can not find any information on biasing the inverting amp into (more) class A. So I'm afraid that this is doable or not? please help
Hey Archwn,
What you are looking to do (the best way) is called a "JFET Cascode." You can do a search right here on this site and find some audio only related info and even more but not only audio on Google.
Good Luck!
Regards//Keith
BTW, I have spent weeks researching this subject and .....
What you are looking to do (the best way) is called a "JFET Cascode." You can do a search right here on this site and find some audio only related info and even more but not only audio on Google.
Good Luck!
Regards//Keith
BTW, I have spent weeks researching this subject and .....
Archwn said:As we know the non inverting amp can be biassed by putting out some current via a resistor(the easiest way) from the output to V-
I've been searching for a while(and I admit that my skill is so decent ) and can not find any information on biasing the inverting amp into (more) class A. So I'm afraid that this is doable or not? please help
You can use the same trick on both inverting or non-inv. to force a class A operation. I have no idea what are the others talking about...
Thanks Keith, darkfenriz and Andrew
Keith: no worries mate. at least I know your point was on the better way to bias the opamp rather than using a resistor. I'm still learning too. I'm now looking into CCS using fet or LM317/LT1085 regs and every comments are at most welcome.
Now I dare to do it. Even the mechanism Andrew explained is far from me to understand, I would take the result then.
I will report if there is or is not a problem.
Cheers,
Archwn
Keith: no worries mate. at least I know your point was on the better way to bias the opamp rather than using a resistor. I'm still learning too. I'm now looking into CCS using fet or LM317/LT1085 regs and every comments are at most welcome.
Now I dare to do it. Even the mechanism Andrew explained is far from me to understand, I would take the result then.
I will report if there is or is not a problem.
Cheers,
Archwn
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- Inverting amp + Class A bias. is it possible or not?