G
Guest
Guest
I am trying to drag myself (kicking and screaming) into the mid 20th century. I know little about transistors but have been learning as I go via this forum.
Several of you have come up with interesting designs for OPAMPs of your own and many classic designs have been examined, much to the benifit of folks like me.
Now, I have been kicking around a discrete design for an OPAMP using a JFET-NPN cascode input. Nothing in this design is revolutionary as I simply stole outright work others have done. So far I have only worked on a simulator to try to get a feel (within the SPICE model parameters) for how things would work on a breadboard.
I would like to solicit your comments, criticism and help in giving this little circuit a going over. I have tried to keep it simple but I am hoping to get at least descent performance with low noise. Since I am an avowed idiot, I await your input.
The schematic follows: http://users.adelphia.net/~thomasholley/JFET-NPN Cascode Input OPAMP.gif
I am hoping to foster a dialoge so that I, and maybe others can learn. I am little concerned that my circuit gets deconstructed.
Thanks, as always.
Several of you have come up with interesting designs for OPAMPs of your own and many classic designs have been examined, much to the benifit of folks like me.
Now, I have been kicking around a discrete design for an OPAMP using a JFET-NPN cascode input. Nothing in this design is revolutionary as I simply stole outright work others have done. So far I have only worked on a simulator to try to get a feel (within the SPICE model parameters) for how things would work on a breadboard.
I would like to solicit your comments, criticism and help in giving this little circuit a going over. I have tried to keep it simple but I am hoping to get at least descent performance with low noise. Since I am an avowed idiot, I await your input.
The schematic follows: http://users.adelphia.net/~thomasholley/JFET-NPN Cascode Input OPAMP.gif
I am hoping to foster a dialoge so that I, and maybe others can learn. I am little concerned that my circuit gets deconstructed.
Thanks, as always.