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Tag Archives: diode

A diode is the basic electronics component which allows current in one direction and blocks it in the other direction. By construction, a diode is the PN junction and is made of P-type and N-type material.

Zener Diode as a Regulator Explained with Example

A Zener Diode is a special purpose diode used for voltage regulation in reverse bias. Zener diode work under breakdown region for typical operation. A minimum current of Zener knee current must be maintained to keep the voltage regulated.

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3 Methods of testing a diode with multimeter and oscilloscope

Symbol of diode

Testing a diode with a digital multimeter in two ways, diode testing portion, and ohmmeter. A diode test is considered passed if it shows low resistance/voltage drop on forward bias and high resistance/voltage drop in reverse bias. A diode curve tracer uses an oscilloscope for VI characteristics graph.

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Voltage Multipliers: Voltage Doubler, Tripler and Quadrupler

Voltage Multipliers are electric circuits to increase the voltage by a factor of two, three or four in case of Voltage Doubler, Tripler or Quarple respectively. The Voltage multiplier circuit uses capacitors and resistors to enhance the voltage level.

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Full Wave Bridge Rectifier operation with Capacitor Filter

full bridge rectifier current flow during positive half cycle

The Bridge type full wave rectifier can convert an AC to DC by the mean of four diodes in such configuration that the output peak voltage remains equal to secondary of transformer peak. In each half cycle, a set of two diodes conduct and block the current alternately.

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Center Tapped Full Wave Rectifier with capacitor filter

Center Tapped Rectifier circuit diagram with center tap transformer and capacitor in filter

A center tapped rectifier converts AC voltage to a DC voltage by the means of center tap transformer and two diodes. The output DC voltage of the rectifier is half of the secondary voltage.

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Halfwave Rectifier with Capacitor Filter and Ripple Factor Calculation

Half wave rectifier Circuit with Capacitor in filter

Rectifiers are the circuit which converts AC Voltage to DC voltage. The half wave rectifier is the simplest type of rectifier with a single diode. The output of the rectifier is filtered with a capacitor filter to smoothen.

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Forward & Reverse Bias of Diode Explained by V-I Characteristic Curves

forward bias and Reverse bias of diode

A diode can be connected in forward and reverse bias with a source. In Forward bias connection, a diode conducts current like a closed switch. Where in reverse bias, a diode blocks current like an open switch.

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Depletion Region formation in PN Junction diode and potential barrier

PN Junction Diode

At the time of developing the PN junction diode, the depletion region is formed. Where free electrons and hole cross the conjunction between P- and N-region and recombine.

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