Consider the following types of digital voltmeters:
1. Ramp type
2. Dual slope integrating type
3. Integrating type using voltage to frequency conversion
4. Successive approximation type
5. Servo balanced potentiometer type
Which of these require a fixed reference voltage at the comparator stage?
A. 1 and 2 only
B. 2, 4 and 5 only
C. 2 and 3 only
D. 1, 4 and 5 only
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> Measurement And Instrumentation
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