How Do You Convert Analog Signals to Digital Using 4-bit Encoding?

[okwatia]

An analog voice signal that vary over the range 0-50mA is digitised by sampling it at 8 kHz. the first four sample values are 10,21,36 and 16mA. write the corresponding digital signal (a string of 1 and 0 bits) by using a 4 bit representation for each sample

 

[chroot]

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- Warren