rjm003
Head-Fier
- Joined
- Mar 31, 2008
- Posts
- 72
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- 146
The circuit below started off life as a pretty standard diamond buffer, and I'm planning next on building this modified version:
It sims out nicely in LTSpice: low distortion, good PSRR, and (as far as I can tell) reasonable bias stability towards voltage and temperature changes.
I'm thinking of using BC550/549 low noise transistors, the output is split three ways to allow TO-92 packages. (~180 C/W to air) The buffer is driven from a non-inverting OP134 which provides the voltage gain for the headphone amp.
How's it look? Any red flags that I've managed to miss?
It sims out nicely in LTSpice: low distortion, good PSRR, and (as far as I can tell) reasonable bias stability towards voltage and temperature changes.
I'm thinking of using BC550/549 low noise transistors, the output is split three ways to allow TO-92 packages. (~180 C/W to air) The buffer is driven from a non-inverting OP134 which provides the voltage gain for the headphone amp.
How's it look? Any red flags that I've managed to miss?
