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I'm building a design using a IM73A135.
The datasheet lists a SNR of 73 dBA and an output impedance of 250 ohms in Normal mode.
Can I use 2 of these and tie the positive outputs together (and the negative outputs together) to gain 3dB SNR while having no increase in output level?
It works in a simulation, but I might be missing something.
I know the normal way to do this is through an active mixer using an op-amp.
However, I want to avoid the space/power needed for the op-amp, as well as the level increase.
I was planning on DC coupling the outputs due to space constraints.
How consistent is the DC output voltage from these mics?
Solved! Go to Solution.
- Labels:
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Noise Floor
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Signal To Noise
-
SNR
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Hi @morpheous85,
Please note that the suggested approach can be used to improve the SNR.
Also note that microphone DC output is stable over the production.
Thanks and regards,
George
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Hi @morpheous85,
I am checking the feasibility of the suggested approach and will update soon.
Thanks and regards,
George
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Hi @morpheous85,
Please note that the suggested approach can be used to improve the SNR.
Also note that microphone DC output is stable over the production.
Thanks and regards,
George
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Thank you!