Phantom Key

Some articles on key, keys, phantom key:

Keyboard Keys - Technology - Control Processor
... Computer keyboards include control circuitry to convert key presses into key codes (usually scancodes) that the computer's electronics can understand ... The key switches are connected via the printed circuit board in an electrical X-Y matrix where a voltage is provided sequentially to the Y lines and, when a key is depressed ... switch matrix is wired to its inputs, it converts the keystrokes to key codes, and, for a detached keyboard, sends the codes down a serial cable (the keyboard cord) to the main processor on the computer ...
Rollover (key) - n-key Rollover - Multi-key Rollover
... A keyboard with "2-key rollover" can reliably detect only any two keys used simultaneously in other words, a user can hold down any key on the keyboard and press a ... However, if the user has two keys depressed and attempts to strike a third key, the third keypress may create a "phantom key" by shorting out the switch matrix ... is not acceptable for quality keyboards because there are many cases when more than two keys need to be depressed at the same time, such as Ctrl-Alt-Delete, or when more ...

Famous quotes containing the words key and/or phantom:

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    HonorĂ© De Balzac (1799–1850)

    King Kong, Count Dracula, and the Phantom of the Opera are just looking for love, like the rest of us.
    Mason Cooley (b. 1927)