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Digital - Information and Comparisons
Digital information and comparisons
| Signal: | Digital signals are discrete time signals generated by digital modulation. |
| Waves: | Denoted by square waves |
| Representation: | Uses discrete or discontinuous values to represent information |
| Example: | Computers, CDs, DVDs, and other digital electronic devices. |
| Technology: | Samples analog waveforms into a limited set of numbers and records them. |
| Data transmissions: | Can be noise-immune without deterioration during transmission and write/read cycle. |
| Response to Noise: | Less affected since noise response are analog in nature |
| Flexibility: | Digital hardware is flexible in implementation. |
| Uses: | Best suited for Computing and digital electronics. |
| Applications: | PCs, PDAs |
| Bandwidth: | There is no guarantee that digital signal processing can be done in real time and consumes more bandwidth to carry out the same information. |
| Memory: | Stored in the form of binary bit |
| Power: | Digital instrument drawS only negligible power |
| Cost: | Cost is high and not easily portable |
| Impedance: | High order of 100 megaohm |
| Errors: | Digital instruments are free from observational errors like parallax and approximation errors. |