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  1. #1
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    help! what is the equivalent model of the headphone? low res like 32 or 20 ohm series

    I just want to design a audio dac, architecture: sigma delta DAC + class D driver

    I don't know the equivalent model of the headphone

    if no LC filter is used on pcb,is class D still work? i mean if we can hear the voice normally?

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  2. #2
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    Re: help! what is the equivalent model of the headphone? low res like 32 or 20 ohm se

    I would think there will be an inductive component, 100s of micro henries? If there is no on board filtering, the leads will radiate the switching frequency which could displease those around you.
    Frank



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  3. #3
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    Re: help! what is the equivalent model of the headphone? low res like 32 or 20 ohm se

    Apart from the EMI problem, I doubt that the inductance of usual dynamic headphones will be suffcient to act as a low pass filter.

    Generally, you'll rather want to measure the impedance of a typical head phone than guessing about it.



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