Banfi T.
100+ Head-Fier
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Quote:
Huhh...kinda scarry to hear it. However, they could be fine as first stage regulators after the C-R filtering. Then something with a lower noise and smaller output resistance at a wider bandwitdth....
Ps.: some opamps are tricky in this regard. E.g. the AD797 has more than 100dB PSU noise rejection on its own. It works just fine with a simple C-R-C filter. Others have less then 50dB rejection.
Originally Posted by 00940 Oh, it was mostly rhetoretical. They were used massively for example in the PassLabs D1 DAC, to regulate the voltage for the analog stage. It was a <5000$ unit. Chances are that if you have a cdp under 1K, the dac is getting its voltage from a LM7805. The Benchmark DAC1 is using LM78**/79** regulators for its opamps too (see the old thread about that) |
Huhh...kinda scarry to hear it. However, they could be fine as first stage regulators after the C-R filtering. Then something with a lower noise and smaller output resistance at a wider bandwitdth....
Ps.: some opamps are tricky in this regard. E.g. the AD797 has more than 100dB PSU noise rejection on its own. It works just fine with a simple C-R-C filter. Others have less then 50dB rejection.