- #1
Converting ADC for DC Output: Homework Statement and Solution
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SUMMARY
The discussion centers on converting an Analog-to-Digital Converter (ADC) output for a direct current (DC) signal, specifically a 2 VDC output (Vo). Participants clarify that a fixed DC value can still be considered an analog signal, challenging the misconception that only time-varying signals qualify as analog. The conversation highlights the role of ADCs in multimeters and emphasizes the importance of understanding the nature of analog signals in various contexts, such as in Wheatstone Bridge circuits.
PREREQUISITES- Understanding of Analog-to-Digital Converters (ADCs)
- Basic knowledge of direct current (DC) signals
- Familiarity with Wheatstone Bridge circuits
- Experience with multimeter operation and measurement techniques
- Research the principles of Wheatstone Bridge circuits and their applications
- Learn about the functionality and types of Analog-to-Digital Converters (ADCs)
- Explore the definition and characteristics of analog signals in electronics
- Study the operation and internal components of digital multimeters
Electronics students, engineers working with measurement devices, and anyone interested in understanding the conversion of DC signals using ADC technology.
- #2
lewando
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Say Vo is at 2 VDC. Why do you think this is not an analog signal?
- #3
berkeman
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It looks like that Vo can change slowly as the Wheatstone Bridge output signal changes. Can you describe what is going on in each stage of this circuit? And estimate the signal out of each stage's output?Minh Thanh said:
- #4
Minh Thanh
Because my multimeter shown a fixed value when it's mode is DC meter.lewando said:
- #5
CWatters
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What were you expecting the meter to show?
- #6
berkeman
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Your multimeter uses an ADC to figure out the measured voltage, BTW. Did you know that?Minh Thanh said:
- #7
Minh Thanh
No .. I mean is that my multimeter reads a value of voltage from output of Vo and I guess that is DC voltage . :D :D The multimeter has no an ADC in itself.berkeman said:Your multimeter uses an ADC to figure out the measured voltage, BTW. Did you know that?
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berkeman
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- #9
lewando
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If your multimeter looks like this:
then
then
would be a true statement.Minh Thanh said:
- #10
Minh Thanh
That is right . I am using it .lewando said:
- #11
lewando
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Why do you think a fixed value is not an analog value? If you think an analog signal needs to be a time-varying signal in order to be converted by an ADC, then that is not a complete understanding. The definition of an analog signal includes signals that do not appear to change over time. For example: the signal that represents the mass of something when placed on an electronic scale is an analog signal.Minh Thanh said:
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