Static v- i characteristics, Electrical Engineering

Assignment Help:

Static V- I Characteristics

The  static V- I  characteristics of power diodes is shown  in figure 1.2  when the  anode is made  positive with  respect to cathode the power  diode  is said  to be forward  biased. In  this condition the power diode behaves as a closed switch. As the anode  voltage  is increased the current will initially be zero  until  the voltage  is less than its threshold  voltage  is the minimum  anode voltage  beyond which the diode current  increases rapidly and diode  starts conducting. A conducting diode has a relatively small  forward voltage drop across. It  the magnitude of the forward voltage  drop depends son the manufacturing  process and temperature.

1909_Static V- I Characteristics.PNG

                                                               Figure Static V- I Characteristics of power diode

When  cathode  of power  diode is made  positive  with respect to anode  the diode  is said  is to be reversed. It  reversed. It  behaves as an  open  circuit. Under reverse biased  condition a small reverse current  flows and this  reverse current  is known as leakage current leakage current increase slowly  in magnitude with the  reverse voltage until the avalanche voltage  is reached. The  avalanche breakdown is a process that occurs  in a diode when high voltage  causes free electrons to travel at high  speeds  colliding with other electrons and  knocking  them out of their  orbits. The  result is  a rapidly increasing amount  of  free electrons  and hence increased current. The  can be  limited by connecting a  resistance in  series  with the  power diode.

 


Related Discussions:- Static v- i characteristics

Ripple voltage amplitude, a) What is meant by Ripple Voltage?  Measure the ...

a) What is meant by Ripple Voltage?  Measure the Ripple Voltage Amplitude, Frequency and DC Offset b) Describe how Ripple Voltage could be decreased.

Why depletion mosfet is known as normally-on mosfet, Q. Why depletion MOSFE...

Q. Why depletion MOSFET is known as "normally-on MOSFET" ? Draw the symbol of n-type and p-type depletion MOSFET. In depletion type MOSFET the drain current flows even when VGS

Lift interface circuitry, Draw the circuit diagram for  the  connections to...

Draw the circuit diagram for  the  connections to the EPROM and  just one RAM device  as defined  in  the memory map in question  3. You must show all the connections required to o

Measure and set frequency by using an oscilloscope, 1. Introduction : ...

1. Introduction : Theory: Frequency is the number of occurrences of a repeating event per unit time. It can also be defined as the number of repetitions (cycles) of a w

Explain direct data addressing mode, Direct data addressing mode (with exam...

Direct data addressing mode (with examples) available in microprocessors. Direct Mode: Instruction comprises memory access. CPU accesses which location into memo

Show npn common emitter amplifier, Q. Show NPN Common Emitter Amplifier? ...

Q. Show NPN Common Emitter Amplifier? The common emitter configuration lends itself to voltage amplification and is the most common configuration for transistor amplifiers.

Demultiplexer, How can i build 1-16 DEMUX using 1-8 DEMUX with logic gates ...

How can i build 1-16 DEMUX using 1-8 DEMUX with logic gates only ?

Asynchronous and synchronous logic design, One of the simplest circuits is ...

One of the simplest circuits is the asynchronous or ' ripple' counter. Below is shown the circuit diagram of a simple 3 stage ripple counter. The operation of this circuit

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd