25 March 2020

Analog To Digital & Digital To Analog Interview Question Answer - 4


46
Why the delay in the flash type conversion occurs?


The delay in the flash type conversion occurs due to priority encoders and comparator in it.

47
What are the advantages of dual slope type A / D converter?


Advantages
  • Low sensitivity to noise
  • Variation in its component value due to change in the temperature


48
Why dual type analog to digital converter is not used in the digital acquisition application?


Due to large conversion time

49
Describe the applications of the dual slope type A / D converter.


Digital voltmeter, multi meter etc.

50
Why the application of Dual slope type A / D converter is limited only for low to medium frequency?


The dual slop type A / D conversion is limited only for low to medium frequency due to slow conversion time.

51
On which parameter the accuracy of the Dual slope type A / D converter depends?
                                        OR
Why the reference voltage should kept precise in the dual slope type A / D converter?


The accuracy of the dual slop type A / D converter depends upon the reference input voltage.

52
Are there any D / A converter used in the voltage to frequency type DAC?
                                 OR
Why the voltage to frequency type ADC is simpler than any other type ADC?


The voltage to frequency type ADC is simpler than any other type ADC because it does not use DAC.

53
What are the application of voltage to frequency A / D converter?


Application
  • Small signal has to be transmitted from transducer to control computer.


54
Which type of analog to digital converter has fixed conversion time?


Successive approximation type ADC

55
Which type of the ADC is most widely used?


Successive approximation type ADC

56
What is output of the integrator when the input is negative constant voltage?


Positive ramp


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