Hey guys,
Long story short: I have to build a voltage regulator (stabilizer it is named in my language) with the following demands:
*discrete parts only (no op-amps nor IC regulators)
*Vin=10~15V
*Vout=8V
*P_load=3W
*Precision: 5%
I've been looking through a lot of books and on the net, I found this nice circuit (look below).
What I find odd is the lack of capacitors.
Also, I have problems calculating the resistances.
Obs: Qs is the load transistor, Qa is the amplifier tr. and Qprot is the short-circuit protection.
Any ideas, suggestion or piece of advice is welcomed.
Cheers!
Long story short: I have to build a voltage regulator (stabilizer it is named in my language) with the following demands:
*discrete parts only (no op-amps nor IC regulators)
*Vin=10~15V
*Vout=8V
*P_load=3W
*Precision: 5%
I've been looking through a lot of books and on the net, I found this nice circuit (look below).
What I find odd is the lack of capacitors.
Also, I have problems calculating the resistances.
Obs: Qs is the load transistor, Qa is the amplifier tr. and Qprot is the short-circuit protection.
Any ideas, suggestion or piece of advice is welcomed.
Cheers!
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