Re: TI-H: Electronic symbols


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Re: TI-H: Electronic symbols




On Thu, 29 Jan 1998 KrazyJolt@aol.com wrote:
> ______
> \         /
>   \     /
>     \ /
>     O

This is an inverter. Here's what the symbol means:

The triangle signifies a driver. Drivers are just a transistor which takes
an input signal (either 0 or 1) and regenerates it. This is useful to make
a signal which used to be a square wave but which has become somewhat
rounded, square again.

The circle on the tip of the triangle signifies "not." So it "not"'s (or
inverts) the previous truth table of the device. For example:

I = Input  O = Output  L = Low (0)  H = High (1)

| Driver |  Inverter |  AND gate  | NAND gate  |
| I | O  |   I | O   | I1  I2 | O | I1  I2 | O |
+---+----+-----+-----+--------+---+--------+---+
| H | H  |   H | L   | H   L  | L | H   L  | H |
| L | L  |   L | H   | L   L  | L | L   L  | H |
+---+----+-----+-----+ H   H  | H | H   H  | L |
                     +--------+---+--------+---+

This table is best viewed in a fixed-width font. Notice how, for the same
inputs, the NOT version of the circuit (the inverter or NAND gate) has
opposite outputs. This is how all NOT (or inverter) circuits work.

-- 
Greg Hill
greg-hill@bigfoot.com
www.comports.com/link



References: