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When a time-varying signal has to be digitized using an ADC, which of the following is necessary to use before digitization?
- a)Time division multiplexer
- b)Frequency division multiplexer
- c)Sample and hold circuit
- d)Instrument amplifier
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
When a time-varying signal has to be digitized using an ADC, which of ...
Sample and Hold circuit:
It samples the incoming analog signal and holds this sample values for a certain instant of time.
In the basic circuit diagram, an analog switch and a capacitor is used to perform the work.
It samples the incoming analog signal and holds this sample values for a certain instant of time.
In the basic circuit diagram, an analog switch and a capacitor is used to perform the work.
In this circuit, the switch can be either BJT, MOSFET, etc.
When the switch is closed by the applied input signal, the capacitor starts charging and holds the sampled value and the sampling interval is the same as the charging duration of the capacitor.
The capacitor holds the sampled value for half interval and changes its value in another half interval of time.
When the switch is closed by the applied input signal, the capacitor starts charging and holds the sampled value and the sampling interval is the same as the charging duration of the capacitor.
The capacitor holds the sampled value for half interval and changes its value in another half interval of time.
Application of sample and hold circuit
Analog to digital converter
- Signal processing
- Filter design
- Oscilloscope
Explanation:
When a time varying signal has to be digitized using an ADC, sample and hold circuit is necessary to use before digitation. Because sample and hold circuit take sample at particular instant.
When a time varying signal has to be digitized using an ADC, sample and hold circuit is necessary to use before digitation. Because sample and hold circuit take sample at particular instant.
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When a time-varying signal has to be digitized using an ADC, which of the following is necessary to use before digitization?a)Time division multiplexerb)Frequency division multiplexerc)Sample and hold circuitd)Instrument amplifierCorrect answer is option 'C'. Can you explain this answer?
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