Lesson 1 - Diode and its Applications

DC Power Supply

Converts standard 120V 60Hz AC into constant DC Voltage.

Transformer

Changes AC Voltage based on the turns ratio between primary and secondary.

Rectifier

Converts the AC Input Voltage to a pulsating dc voltage.

Filter

Eliminates the fluctuations in the rectified voltage.

Regulator

a device that maintains a stable and consistent output voltage, regardless of fluctuations in the input voltage or load conditions, ensuring a reliable power supply for electronic devices.

Load

A circuit or device connected to the output of the power supply and operates from the power supply voltage and current.

Peak Inverse Voltage

Equals to the peak value of the input voltage.

Turn Ratio

The number of turns in the secondary divided by the number of turns in the primary.

Full Wave Rectifier

Allows unidirectional current through the load during the entire 360 degree of the cycle.

Half Wave Rectifier

Allows current through the load only during one half of the cycle.

Center Tapped Full Wave Rectifier

A type of full-wave rectifier that used two diodes connected to the secondary of a center tapped transformer.

Full Wave Bridge Rectifier

A full wave rectifier that doesn’t result in the loss of half the input voltage.

Clipping Circuit

A wave shaping circuit which controls the shape of the output waveform by removing or clipping a portion of the applied wave.

Series Clipper

Clips any voltage that does not forward bias it.

Parallel Clipper

Clips any voltage that forward bias it.

Ripple Voltage

The variation of capacitor voltage due to the charging and discharging.

Ripple Factor

Is an indication of the effectiveness of the filter.

Line Regulation

Specifies how much change occurs in the output voltage for a given change in the input voltage.

Load regulation

Specifies how much change occurs in the output voltage over a certain range of load current values.

Zener Diode

A silicon PN Junction devices that is designed for operation in the reverse breakdown region.

Varactor Diode

A diode that always operates in reverse bias and is doped to maximize the inherent capacitance of the depletion.

Light Emitting Diode

Diode that lights up with forward biased.