Since I have a couple of headphones at home and I don't have any amplifier for them, I decided to build one. Of course I could buy one, but I doubt that I would be satisfied with it......
For the basis I took schematic from TI evaluation module for LME49600 with DC servo, which is nothing new. On the PCB pic below, you'll notice that I went for dual mono version PCB design. Each channel, VAS and buffer, has its own positive and negative low noise regulators. For the first time I used TPS7A4901 and TPS7A3001 regulators, so I don't know what to expect from them. I also still haven't done any calculations for various loads if these regulators will be sufficient, since positive one can supply 150mA and negative 200mA. I plan to supply the amplification part of the circuit with +/-10V.
Stay tuned for more.
Best Regards,
Aleš
For the basis I took schematic from TI evaluation module for LME49600 with DC servo, which is nothing new. On the PCB pic below, you'll notice that I went for dual mono version PCB design. Each channel, VAS and buffer, has its own positive and negative low noise regulators. For the first time I used TPS7A4901 and TPS7A3001 regulators, so I don't know what to expect from them. I also still haven't done any calculations for various loads if these regulators will be sufficient, since positive one can supply 150mA and negative 200mA. I plan to supply the amplification part of the circuit with +/-10V.
Stay tuned for more.
Best Regards,
Aleš