Diode from you and me
GROUP 2 – BSEE 301- B
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Electronics 1 Diodes, Slides of Electronic Measurement and Instrumentation
An introduction to diodes, including their parts, types, and uses. It explains the function of diodes in forward and reverse biased conditions and provides examples of different types of diodes, including PN junction diodes, Zener diodes, Schottky diodes, light-emitting diodes, photodiodes, and step recovery diodes. The document also includes examples of problem-solving with diodes using Ohm's law.
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2020/2021
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Diode from you and me
GROUP 2 – BSEE 301- B
REPORTERS WALWALAN
WHAT IS DIODES?
(^) a semiconductor device with two terminals, typically allowing the flow of current in one direction only.(wikipedia) (^) An electrical component that allows the flow of current in only one direction. In circuit diagrams, a diode is represented by a triangle with a line across one vertex.(Britannica)
WHAT IS THE PARTS OF DIODES
ANODE (+) - Positive Terminal of the diode CATHODE (-) - Negative Terminal of Diode INSULATING COAT(RESIN) – COVERS THE BODY OF DIODE POSITIVE MATERIAL JUNCTION (P) – A SILICON TYPE WITH ALUMINUM JUNCTION. NEGATIVE MATERIAL JUNCTION (N) – A SILICON TYPE WITH PHOSPHORUS JUNCTION.
HOW DIODE WORKS?
FORWARD BIASED – DIODE WORKS AS CONDUCTOR WHEN THE IT IS
ON CORRECT WAY, WE USE ELECTRON FLOW THEORY THAT THE
BATTERY VOLTS IS FROM NEGATIVE TO POSITIVE WAY.
HOW DIODE WORKS?
REVERSE BIASED – DIODE WORKS AS INSULATOR WHEN IT IS ON
OPPOSITE DIRECTION , WE USE THE CONVENTIONAL CURRENT
THEORY THAT BATTERY VOLTS IS FROM POSITIVE TO NEGATIVE.
WHAT ARE THE TYPES OF DIODES?
AND THEIR USES
PN JUNCTION DIODE - IT IS THE NORMAL/ STANDARD FORM OF
DIODE. USUALLY USED IN RADIO FREQUENCY OR OTHER LOW
CURRENT DEVICES.
WHAT ARE THE TYPES OF DIODES?
AND THEIR USES
ZENER DIODE – USE TO PROVIDE STABLE REFERENCE VOLTAGE ,
WORK AS A REVERSE BIASED CONDITION AND FOUND THAT WHEN A
PARTICULAR VOLTAGE IS REACH IT BREAKS DOWN. ALSO IT IS USE TO
OFFER REFERENCE VOLTAGE TO POWER SUPPLIES.
WHAT ARE THE TYPES OF DIODES?
AND THEIR USES
(^) GUNN DIODE – USE TO PRODUCE MICROWAVE SIGNALS FROM 10 GHz to THz. It is a Negative Differential Resistance device – also called as transferred electron device oscillator – which is a tuned circuit consisting of Gunn diode with DC bias voltage applied to it.
WHAT ARE THE TYPES OF DIODES?
AND THEIR USES
(^) LASER DIODE - Laser diodes are the most common type of lasers produced, with a wide range of uses that include fiber optic communications, barcode readers, laser pointers, CD/DVD/Blu- ray disc reading/recording, laser printing, laser scanning and light beam illumination.
WHAT ARE THE TYPES OF DIODES?
AND THEIR USES
(^) PHOTODIODE - is a semiconductor device with a P-N junction that converts photons (or light) into electrical current. The P layer has an abundance of holes (positive), and the N layer has an abundance of electrons (negative). It also in reserved biased condition.
WHAT ARE THE TYPES OF DIODES?
AND THEIR USES
(^) STEP RECOVERY DIODE – It is a type of microwave diode use to generate pulses at the very high frequency. It s also called snap-off diode or charge-storage diode. The applications of these diodes are in higher order multipliers and in pulse shaper circuits. The cut-off frequency of these diodes is very high which are nearly at Giga hertz order.