Digital Signal Processing - Technical MCQs
Q1: In a flash analog-to-digital converter, the output of each comparator is connected to an input of a ________.A
decoder
B
priority encoder
C
multiplexer
D
demultiplexer
ANS:B - priority encoder An N bit flash ADC has 2^n comparators. When an unknown input Vin is applied to its input, all comparators whose reference voltage is less than Vin will give output 1 while others will give output 0. THe highest reference valued comparator is nearest to Vin. Thus a priority encoder will convert it to binary. |
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