☑ Ordinary Diode Symbol

The diode consists the p region and n region which is separated by the intrinsic semiconductor material. Different types of diodes have different voltage requirements.

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Tutorial 2 Zener Diodes

An ordinary diode be it silicon or germanium conducts in one direction only whereas a zener diode conducts in both directions but at different voltages.

Ordinary diode symbol. The reverse breakdown voltage is a destructive and permanent damage phenomenon for an ordinary diode. A diode vacuum tube or thermionic diode is a vacuum tube with two electrodes a heated cathode and a plate in which electrons can flow in only one direction from cathode to plate. An ordinary diode is used to rectify using its forward bias characteristics while a zener diode is used to regulate using its reverse bias characteristics.

The arrowhead on the symbol still points in the conventional direction of forward current when the device is forward biased. Generally diodes are used as reverse polarity protector and transient protector. The anode is the positive terminal and cathode represent their negative terminals.

2 26a is the same as that for an ordinary diode but with the cathode bar approximately in the shape of a letter z. The symbol of schottky diode is shown in the below figure. Symbol of varactor diode.

Its symbol is somewhat similar to an ordinary diode. The circuit symbol for a zener diodes characteristics in fig. However in varactor diode the cathode terminal is shown by the 2 plates of the capacitor.

For silicon diodes the forward voltage is 07v and for germanium it is 03v. The figure below shows the symbolic representation of a varactor diode. In schottky diode the metal acts as the anode and n type semiconductor acts as the cathode.

An ordinary diode can reach the reverse bias voltage where the diode will be unable to stop the current flow and is called reverse breakdown voltage. A semiconductor diode the most commonly used type today is a crystalline piece of semiconductor material with a pn junction connected to two electrical terminals. Metal semiconductor m s junction is a type of junction formed between a metal and an n type semiconductor when the metal is joined with the n type.

It has two electrodes called anode or plate and cathode it uses the rectifying properties of the union between type p and n materials of a semiconductor. The anode and cathode are the two terminal of the pin diode. The diode is a semiconductor device that allows the current to flow in one direction only.

This is done to represent the effect of capacitance during operation. In silicon diode the dark band indicates the cathode terminal and the other terminal is anode. The symbolic representation of the pin diode is shown in the figure below.