why need those 10K resistors to reduce input impedance?

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The ISL59441 has input buffer but why need those 10K resistors to reduce input impedance?

Thank you for your answers.
 

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I assume they are to prevent the inputs floating, provide a DC reference point and supply the input bias current, not to reduce input impedance.

Keith
 
You mean those 10K resistors are for making smooth edge?

Thank you for your answers.

---------- Post added at 13:43 ---------- Previous post was at 13:42 ----------

Just like High pass filter?
 

No. Because the inputs are capacitively coupled you need to fix the DC level of the chip to somewhere - you cannot just let it float around.

Keith
 
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