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i am looking for suitable replacement for SSM2166 (mic preamp)...pls suggest the best solution

In our applications we have observed that SSM2166 is vulnerable/susceptible to Radio Emissions (with AM modulation) from near by VHF system. In order to overcome this pls suggest the alternative for SSM2166.....

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  • hi KJ Bob & Coleman,

    Sorry for the delay. It was long time i had opened engineer forum. My system is differential and today i made one filter circuit with series 47uH and shunt 0.01uF. Two circuits ( each one for Mic-HI line and Mic_Lo line) and i had made and connected the filter circuit before the microphone  signal reaches the SSM 2166.

    i will let u know the results of RFI susceptibility with this circuit.

    Thanks & Regards,

    Naveen

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  • hi KJ Bob & Coleman,

    Sorry for the delay. It was long time i had opened engineer forum. My system is differential and today i made one filter circuit with series 47uH and shunt 0.01uF. Two circuits ( each one for Mic-HI line and Mic_Lo line) and i had made and connected the filter circuit before the microphone  signal reaches the SSM 2166.

    i will let u know the results of RFI susceptibility with this circuit.

    Thanks & Regards,

    Naveen

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