Jfet? :mistake
Please enlighten TS
Firstly, was using 70k in place of Q4 and Q5, was testing DC "Quiescent point" (watching the emitter of Q4, expecting about 6v there) and noticed that if scope probe was at collector of Q1 then the output voltage (emitter of Q4) went up to about 11v. strange (why's this?) when changed the 70k to current source, and probe was still there then it went up to around 7v
Now..This circuit does not work..was expecting a large gain but 'nothing' showed up on scope
R7 is boostrap resistor right? which is current source on Q3, yh?
What am I missing?
Please enlighten TS
Firstly, was using 70k in place of Q4 and Q5, was testing DC "Quiescent point" (watching the emitter of Q4, expecting about 6v there) and noticed that if scope probe was at collector of Q1 then the output voltage (emitter of Q4) went up to about 11v. strange (why's this?) when changed the 70k to current source, and probe was still there then it went up to around 7v
Now..This circuit does not work..was expecting a large gain but 'nothing' showed up on scope
R7 is boostrap resistor right? which is current source on Q3, yh?
What am I missing?
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