Waveform conversion of Analogue to Digital

[Kroose65]

I have an assessment at the moment and one of the questions is about the conversion of an Analogue wave to Digital one. I know how it is graphed and the basic concepts but I have no idea how to express it being forced into a grid. I was wondering if anyone knew any websites or books which has simply information that I am looking for. I have searched the web but must of the stuff I am finding is making no sense to me and continues to involve theories in electronics.

Thank you for any help in advance!

 

[Kroose65]

Sorry if haven't been so accurate with my information but basically what I need help with is converting an analogue wave to a digital one on a grid.

 

[gneill]

There are several types of digitization. All involve sampling the waveform at discrete times. The basic method is to take and record values at a regularly spaced time intervals. So, plot the waveform on a grid with the x-axis being time and the y-axis being the waveform value (voltage, current, whatever). Choose a sampling time interval and divide the time axis into regularly spaced intervals. Record the waveform values at the interval boundaries.

A second method second is similar, only for a given sample it records the difference between the previous sample and the current one. There are other methods, which I won't elaborate. Which method you choose depends upon what it is you're trying to accomplish.

 

[Kroose65]

I think I have it right and I just want make sure that I have got my facts correct. What I had to add was 1. forcing curve to fit into grid, 2. Sampling and 3. Converting values to binary notation (each point is worth 1 mark). Thank you for any help given, Cheers!

Analogue to Digital Conversion (ADC) works by using a process call quantisation which is the digitising process applied to an analogue signal. The process involves converting the shape of an analogue wave into a stream of numbers which can be represented by the binary code which is made up of 0s and 1s. The analogue wave is forced into a grid which is measured at an equal time interval (ADD THE AXIS’ HERE REGARDING MY EXAMPLE). In an 8-bit process (there is also 16, 32 and 64-bit process) the signal is represented by numbers from 0-7 which are then converted into the binary code using a combination of three 0s and 1s. The sampling is done at a certain amount of times per second. The digital signal which comes from this conversion represents the original analogue wave but in binary code. The accuracy of the digital wave can be improved by decreasing the time between intervals and by using a higher bit process.

 

[asteriatic]

Hello,

The conversion of an analogue wave to a digital one is a fundamental process in modern technology. Essentially, it involves taking a continuous analogue signal and converting it into a series of discrete digital values that can be processed and stored by a computer or other digital device.

There are several steps involved in this conversion process, including sampling, quantization, and encoding. Sampling involves taking measurements of the analogue signal at regular intervals, known as the sampling rate. This creates a series of data points that represent the amplitude of the signal at each sampled point in time.

Quantization involves assigning a numerical value to each sampled data point, typically based on a predetermined scale. This process is important because it allows for the analogue signal to be represented by a finite set of numbers, making it easier to process and store.

Finally, encoding involves converting the quantized values into a binary code, typically using a system known as pulse code modulation (PCM). This converts the analogue signal into a series of 0s and 1s, which can be stored and processed by a digital device.

In terms of expressing this process visually, you can think of it as the analogue wave being "forced" into a grid, where each grid point represents a sampled data point. The amplitude of the wave at each point is then quantized and encoded into binary code, creating a digital representation of the original analogue signal.

I would recommend looking into resources on digital signal processing or basic electronics to gain a better understanding of this conversion process. Some helpful websites include Electronics Tutorials (https://www.electronics-tutorials.ws/) and All About Circuits (https://www.allaboutcircuits.com/). Additionally, textbooks such as "Digital Signal Processing" by John G. Proakis and Dimitris G. Manolakis or "Principles of Electronic Communication Systems" by Louis E. Frenzel Jr. may also provide useful information.

I hope this helps with your assessment and please let me know if you have any further questions. Good luck!