how do you clculate r20 and r24 in function of k170 idss?View attachment 1193875
Modified the Mirrored-F8 into DC coupled with a servo before I making one to have some fun.
But you can build the mirrored J2 (UDNeSS) and run it as an inverted amp.
Not possible with the mirrored F8.
Patrick
I am not sure, I just take it as a normal voltage divider for negative feedback voltage reference although its a CFA.
I am trying to simulate a higher voltage version with cascoded input stage and "individual biased" lower mosfets which I guess matching the lower mosfets is not crucial here. Just the higher side mosfet has more stress to work alone.
PS: I am still dreaming to have a dynamic biasing for it to work with lower impedance loads with higher efficiency...
2 new objectives into the circuit:
A. Dynamic biasing adjustor:
I am trying with two optocouplers to bias the circuit, making it to work better with low impedance loads. Instead of Single Ended with only 15w4ohm, its now beyond 35w4ohm. Still figuring a better way...
B. Transimpedance Output like Valve amp coupled with transformer:
Taking the speaker impedance feedback into the circuits. When the impedance increase, the output increase, so the fullrange speakers will sing like a Vshape EQ, hopefully.