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<blockquote data-quote="Mark DeArman" data-source="post: 147423" data-attributes="member: 950">Re: Designing and making electronics for phantom power micI&#039;ve seen a number of designs out there similar to what you are asking.&nbsp; But why can&#039;t you just put your volume adjust/mute after the bias-tee you use to supply power to the capsule? Using a local power source like a battery, instead of remote phantom power.&nbsp; You also need to properly handle the condition where the capsule is connected/disconnected from the power supply if you allow disconnecting.&nbsp; But you&#039;ll probably end up with a lower noise design.Otherwise, decouple the remote phantom power, filter and use for a local power supply.&nbsp; You could use one of those COTS PGA chips to do the mute/attenuation with.&nbsp; Still you will need to supply power to the capsule so you need to make sure the parts in your bias-tee are not attenuating too much of the AC signal.</blockquote>

[QUOTE="Mark DeArman, post: 147423, member: 950"] Re: Designing and making electronics for phantom power mic I've seen a number of designs out there similar to what you are asking. But why can't you just put your volume adjust/mute after the bias-tee you use to supply power to the capsule? Using a local power source like a battery, instead of remote phantom power. You also need to properly handle the condition where the capsule is connected/disconnected from the power supply if you allow disconnecting. But you'll probably end up with a lower noise design. Otherwise, decouple the remote phantom power, filter and use for a local power supply. You could use one of those COTS PGA chips to do the mute/attenuation with. Still you will need to supply power to the capsule so you need to make sure the parts in your bias-tee are not attenuating too much of the AC signal. [/QUOTE]

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