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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:There is no analog signal . It just is DC . How can I convert ADC for output of Vo ?
Because my multimeter shown a fixed value when it's mode is DC meter.lewando said:Say Vo is at 2 VDC. Why do you think this is not an analog signal?
Your multimeter uses an ADC to figure out the measured voltage, BTW. Did you know that?Minh Thanh said:Because my multimeter shown a fixed value when it's mode is DC meter.
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?
http://www.circuitstoday.com/wp-content/uploads/2009/12/ICl7107-voltmeter-circuit.pngMinh Thanh said:The multimeter has no an ADC in itself.
would be a true statement.Minh Thanh said:The multimeter has no an ADC in itself.
That is right . I am using it .lewando said:
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:Because my multimeter shown a fixed value when it's mode is DC meter.
An ADC (Analog-to-Digital Converter) is a device that converts analog signals into digital signals. It works by sampling the analog signal at regular intervals, and then converting each sample into a digital value that represents the amplitude of the signal at that point in time. This process is repeated continuously, resulting in a series of digital values that can be used to reconstruct the original analog signal.
The purpose of converting ADC for DC output is to measure the amplitude of a DC (direct current) signal and convert it into a digital value that can be used for further processing or analysis. This is useful in many applications, such as in monitoring and control systems, where DC signals are commonly used.
The conversion process from ADC to DC output involves several steps. First, the analog signal is sampled by the ADC at regular intervals. Then, the sampled values are converted into digital values using a mathematical formula. Finally, the digital values are scaled and converted into the desired units of measurement for the DC output.
There are many different types of ADC, but the most common are the successive approximation ADC, the delta-sigma ADC, and the flash ADC. Each type has its own advantages and disadvantages, and the choice of which type to use depends on the specific application and requirements.
Choosing the right ADC for a project depends on several factors, including the required accuracy, speed, resolution, and cost. It is important to carefully consider these factors and compare different ADC options to find the one that best fits the project's needs. Additionally, consulting with an expert in the field or conducting thorough research can also help in selecting the most suitable ADC for a project.