Hi all,
I'm having a problem with the attached circuit. It was meant to be a front-end for a power supply. Basically, the output voltage is controlled via SPI. It works, but the noise from the pre-regulator DC-DC circuit passes almost unharmed through the pass element on the output stage. Any suggestions on how to improve the PSRR of the output stage?
For now, I only have a beautiful piece of modern art. At least, I can control the output voltage down to the mV, but the output noise makes it useless.
Kind regards, Samuel Lourenço
I'm having a problem with the attached circuit. It was meant to be a front-end for a power supply. Basically, the output voltage is controlled via SPI. It works, but the noise from the pre-regulator DC-DC circuit passes almost unharmed through the pass element on the output stage. Any suggestions on how to improve the PSRR of the output stage?
For now, I only have a beautiful piece of modern art. At least, I can control the output voltage down to the mV, but the output noise makes it useless.
Kind regards, Samuel Lourenço
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