Hi H500,
I don’t understand about “the advantage of low impedance and temperature compensation”. This is so strange for me, if you can pls share document about this then I try to study.
For the standby current reduction circuit, we will add more sub-circuit as attached file. But I’m not sure whether it can work or not?
I try to understand about Q5, Q7, Q6, R19 and R27 as follow:
+ Q5 and Q7 always “ON” -> Vbe of Q6= R27(12/ (R27+ R19)) = 2k(12/17,4k+2k)=1.237V -> Q6 “ON” -> 12V at node Emitter Q6&C12&R30&R31 (it should be 0.5V per ohm into the resistor network) -> this is very illogical for me – pls help me clear.
Pls also say about R23, how many value which we follow.