ph33lix
Head-Fier
- Joined
- Mar 24, 2008
- Posts
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Hi guys.
I'd like to ask for some advice for a circuit I would like to build based on figure 9b of the following article.
I realized that it is possible to bias the NPN transistors in an op-amp to class A provided that the opamp is driving a high input impedance buffer based on tangentsoft's detailed article on biasing op-amps.
My question is whether the input impedance of the mosfet follower's section is almost or equally high enough to permit biasing of the opamp into class A without going into over-current protection. And whether it is practical to do so or not.
I tried running a search here, headwize's projects page and in google, but I seem to only get articles on circuit schematics featuring mosfets and not much about what I asked above.
Many thanks in advance.
I'd like to ask for some advice for a circuit I would like to build based on figure 9b of the following article.
I realized that it is possible to bias the NPN transistors in an op-amp to class A provided that the opamp is driving a high input impedance buffer based on tangentsoft's detailed article on biasing op-amps.
My question is whether the input impedance of the mosfet follower's section is almost or equally high enough to permit biasing of the opamp into class A without going into over-current protection. And whether it is practical to do so or not.
I tried running a search here, headwize's projects page and in google, but I seem to only get articles on circuit schematics featuring mosfets and not much about what I asked above.
Many thanks in advance.