analog to digital converters???

Question

what is mean by a "quantization level " in adc ? tell that in common language and with examples if possible . i did not understand much in wikipedia .
thx!!!

Answer 1

An ADC will quantize or 'digitize' an analog signal. That is, it will sample the voltage level of the analog signal and assign a number to that particular level.

A 2-bit ADC with a 10 Volt input can only have 4 levels, because 2 digital bits can be: 00, 01, 10, or 11 that's all.
So, any voltage from 0 to 2.4999 volts gets quantized to 00.
Any voltage from 2.5 to 4.9999 volts gets quantized to 01.
Any voltage from 5.0 to 7.4999 volts gets quantized to 10.
Any voltage from 7.5 to 9.9999 volts gets quantized to 11.
The quantization level for a 2-bit 10 Volt ADC is 2.5 volts -- that is the 'step' of voltage for a given digital number.

Likewise a 4-bit ADC will have 16 quantization levels, and for a 10 volt input each level will be 625 millivolts. If the maximum input voltage were only 2 volts instead of 10, the quantization level would be 2/16 = 125 millivolts.

An 8-bit ADC will have 256 quantization levels, a 12-bit ADC will have 4096 quantization levels. etc. etc.

For the 12-bit converter and a 5 volt max. input, the quantization level is 5/4096 = 1.22 millivolts.

Hopefully you get the point?

.

Answer 2

Quantization level is a range given to a noise without a rhytem in the range and feeds out information in a order fashion. This level also is given a symbol.

Examples:
radio
microphones
tv's
temperature