Explanation: In servo converter, the circuit consist of an up/down counter with comparator controlling direction of the count. So, if the input voltage is greater than DAC output signal, the output of comparator goes high and counter is caused to count up. 11. At what condition error occurs in the servo tracking A/D Converter?
A. Slow change input
B. Rapid change in input
C. No change in input
D. All of the mentioned.
Answer:A
Explanation: In servo converter, the circuit consist of an up/down counter with comparator controlling direction of the count. So, if the input voltage is greater than DAC output signal, the output of comparator goes high and counter is caused to count up. 11. At what condition error occurs in the servo tracking A/D Converter?
A. Slow change input B. Rapid change in input C. No change in input D. All of the mentioned.
Explanation: As long as the analog input changes slowly, the tracking A/D converter will be within one LSB of the corrected value. When the input changes rapidly, the tracking A/D converter cannot keep up with change and error occurs. 12. How many clock pulses do a successive approximation converter requires for obtaining a digital output.