Diode

Semiconductor diodes denote a symbol that has been preserved in general terms from the time of the first radio receivers (Fig. 1).

The apex of the triangle in this symbol indicates the direction of the greatest conductivity (the triangle symbolizes the anode of the diode, and a short dash perpendicular to the lead lines is its cathode).

The same symbol denotes semiconductor rectifiers, consisting, for example, of non-series, parallel or mixed-connected diodes (rectifier poles, etc.).

Bridge rectifiers are often used to power radio equipment.

The outline of such a circuit for connecting diodes (a square, the sides of which are formed by diode symbols) has long become generally accepted, therefore, to designate such rectifiers, they began to use a simplified square symbol with a single diode symbol inside (Fig. 2).

Depending on the value of the rectified voltage, each arm of the bridge can consist of one, two or more diodes.

The polarity of the rectified voltage on the diagrams is not indicated, since it is uniquely determined by the diode symbol inside the square.

Bridges, structurally combined in one body, are shown separately, showing belonging to one product in the reference designation (Fig. 3, VDl.l, VDI.2).

Next to the positional designation of diodes, like all other semiconductor devices, as a rule, their type is also indicated.

Based on the diode symbol, the symbols for semiconductor diodes with special properties are constructed.

To obtain the desired symbol, special characters are used, depicted either on the most basic symbol, or in the immediate vicinity of it, and in order to focus on some of them, the basic symbol is placed in a circle - a symbol for the body of a semiconductor device.