What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?

What are three advantages of adding an ac bias voltage to  the input signal instead of adding a fixed dc bias voltage?
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1 Answer

Answer :

a. Reproduces a stronger output signal.  
 b. Greatly improves the SNR.  
 c. Greatly reduces the natural tape hiss.
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Related questions

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