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Term
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Description
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| Differential Manchester Encoding |
A method of encoding serial data where a 1 is represented by a transition at the center of the bit cell with the opposite polarity from the transition at the center of the preceding bit cell. A 0 is represented by a transition at the center of the bit cell with the same polarity as the transition at the center of the preceding bit cell. In both cases, transitions at the beginning of the bit cell set up the level required to make the correct center transition. Also referred to as conditioned diphase or differential bi-phase encoding. |
| Digital |
A system that uses discrete states to represent information. |
| Digital Ground |
A common 0V ground reference for all digital signals. Digital ground and analog ground systems are usually wired separately to avoid introducing digital noise into the analog circuit. |
| Diode |
An electronic component that lets current flow only in one direction. |
| DisplayPort |
A VESA standard digital video interface that can transmit video, audio, USB and other forms of data. |
| Driver |
1. A driver circuit, or buffer, that operates high-current or high-voltage devices. 2. Driver software links application programs and specific I/O devices. |
| Dry Contact |
1. Metallic contacts in a relay or switch that mechanically touch to make a contact. 2. Contacts through which no current flows. See: Wet Contact. |
| DTE |
Data Terminal Equipment. A communication device that generates or receives data. In serial communication, the DTE device is generally a computer or host. See also DCE. |
| DVI |
Acronym for Digital Visual Interface. The DVI was developed to provide a digital video transmission method to replace the analog VGA interface. |
| Earth Ground |
The ground point in a system that provides the lowest voltage-reference point, or "earth." An earth ground usually connects to a power-line ground, a ground rod, or in some cases, cold-water plumbing. An earth ground should not carry current. |
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