Hello,
I have attached an schematic of a regulator circuit for low level circuits. I have actaully seen on diyaudio circuits similiar with better performance using current sources and remote sensing etc but I cannot for the life of me find them. Damn.
The circuit basically just uses a 10v Zener feed from a load resistor. This could be easy replaced by a CCS and a LM4040 or LM4050. Also an RC filter could be added to further reduce noise. It is current limited to arround 35mA. Personally, I do not like the pass transistor being in common emitter mode (due to poorer transient repronse compared with emitter follower) but I think this will bugger up the protection circuit which is important.
Was thinking of replacing R6 with a J50X current source feed by a RC filter to drop the voltage also. (sure I have seen a design like this but can't find it)
A bootstrap capacitor could also be added.
The circuit passes 1mA through R3 4K7 to drive the pass transistor. I wonder whether this could be replaced by a J50* current source also.
Help apppreciatted
Kevin
I have attached an schematic of a regulator circuit for low level circuits. I have actaully seen on diyaudio circuits similiar with better performance using current sources and remote sensing etc but I cannot for the life of me find them. Damn.
The circuit basically just uses a 10v Zener feed from a load resistor. This could be easy replaced by a CCS and a LM4040 or LM4050. Also an RC filter could be added to further reduce noise. It is current limited to arround 35mA. Personally, I do not like the pass transistor being in common emitter mode (due to poorer transient repronse compared with emitter follower) but I think this will bugger up the protection circuit which is important.
Was thinking of replacing R6 with a J50X current source feed by a RC filter to drop the voltage also. (sure I have seen a design like this but can't find it)
A bootstrap capacitor could also be added.
The circuit passes 1mA through R3 4K7 to drive the pass transistor. I wonder whether this could be replaced by a J50* current source also.
Help apppreciatted
Kevin
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