Many thanks b QUESTION 10 ANALOGUEDIGITAL CONVERTER 10 Marks

Many thanks

(b)

QUESTION 10: ANALOGUEDIGITAL CONVERTER (10 Marks) (a) (2 Marks) In an A/D conversion process, what do a transducer and a signal conditioning circuit respectively do?

Solution

a) ADC are used in various application where different physical parameters are to be measured , transducers are useful here to convert sum form of energy into corresponding electrical voltage . signal conditioners are used to bring the voltage generated by the transducer so that it is suitable to be an input to the ADC.

b)

c)

quantisation error is given by Q=Vref/2^n

n=6 and Vref = 5

Q=5/2⁶=.078125

it can be reduced by increasing the number of bits

table

step	bit i	SAR binary	Vref	fnal value of bit i
1	6	100000	2.5	1
2	5	110000	3.75	0
3	4	101000	3.125	1
4	3	101100	3.4375	1
5	2	101110	3.69375	0
6	1	101101	3.515025	1