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Old 26th February 2002, 09:04 PM   #1
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Default Jfet

Jfet discreet transistor op amp...... looks pretty cool.

http://www.forsselltech.com/schemati...et%20Opamp.PDF

H.H.
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Old 26th February 2002, 09:13 PM   #2
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Default Jfet opamp paper

To go with the previous post:
http://www.forsselltech.com/JFET%20Opamp.PDF

H.H.
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Old 26th February 2002, 09:57 PM   #3
sonnya is online now sonnya  Denmark
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It is so simple!

If any one is going to build it, Be sure that the feedback pair has low resistance.. Why?? If it is going to be used in inverted mode the their is no problem..
No change in the voltage across the inputpair, but if it is in noninverted mode the voltage change on a jfet will change it parasitic capacitance a lot => higher distortion in noninverted mode.
And 2SK170 has a higher cgd and cgs than the average JFET.

But i still think it is a great design, wich i have to try out.

Thumbs up!! HH

Did you like the spice lib ?

Sonny
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