Semiconductor diode

• semiconductor diode - is composed of two electrodes, the anode and the cathode, which are illustrated as a hole-electron pair.
• silicon diode - has the property of conducting current when connected in forward bias.
• zener diode - was designed for limiting the voltage across its terminals in reverse bias.
• light-emitting diode - is a semiconductor device specifically a pn junction diode fabricated from materials that emit light when forward bias.
• Infrared - is light that in a range of wavelenghts greater than the visible light.
• photodiode - has a small transparent window that allows light to strike the pn junction.
• dark current - when there is no incident light, no current will flow in the circuit due to high resistance, so the LED is off.
• reverse current - when there is an incident light, resistance in the photodiode decreases, so the LED is on.
• varactor diodes - are also as variable-capacitance diode because of the junction capacitance varies with the amount of reverse-bias voltage.
• current regulator diode - is often referred to as a constant-current diode.
• current regulator diode - rather than maintaining constant voltage, as the zener does, this diode maintains a constant current.
• schottky diode - are used primarily in high-frequency and fast switching applications.
• schottky diode - they are also known as Hot Carrier Diodes.
• pin diode - consists of heavily doped p and n regions separated by an intrinsic region.
• When in reverse-biased, the pin diode acts like a nearly constant capacitance.
• When in forward-biased, the pin diode acts like a current-controlled variable resistance.
• tunnel diode - exhibits a special characteristics known as negative resistance.
• LASER stands for Light Amplification by Stimulated Emission of Radiation.
• monochromatic - which means that it consist of a single color and not a mixture of colors.
• coherent light - a single wavelength.
• zener diode - this diode is intended to operate at that voltage, and so finds its greatest application as a voltage regulator.