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DIY & Tutorials
DIY For Audio
PGA231x Based preamp
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<blockquote data-quote="pwatts" data-source="post: 3108" data-attributes="member: 146"><p>Well you should have seen that from the datasheet - The PGA's performance drops at high gain. Most of the designs are for that reason configured such that the PGA itself adds very little or no gain at all, and the input and/or output buffers do the gain as they'll add less noise at higher gains than the PGA. Try it for yourself, it's only a resistor and some software adaption. The noise should be gone or at least much lower. I'm using the PGA on a single-sided board at ear-splitting levels with headphones without any audible noise.</p></blockquote><p></p>
[QUOTE="pwatts, post: 3108, member: 146"] Well you should have seen that from the datasheet - The PGA's performance drops at high gain. Most of the designs are for that reason configured such that the PGA itself adds very little or no gain at all, and the input and/or output buffers do the gain as they'll add less noise at higher gains than the PGA. Try it for yourself, it's only a resistor and some software adaption. The noise should be gone or at least much lower. I'm using the PGA on a single-sided board at ear-splitting levels with headphones without any audible noise. [/QUOTE]
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DIY & Tutorials
DIY For Audio
PGA231x Based preamp
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