Why DIODE is a non linear device???

• Ideal Diode:

➝ We know that an Ideal Diode is work same as an Ideal switch as discussed earlier.

➝Ideal Diode does not consume or Absorb any power from the source it means it has zero internal resistance and power loss.

Fig(a) Symbol of an Ideal Diode

• DEFINITION:-

➝"An ideal diode is one type of electronic switch (Ideal Switch), it allows to pass the current in only one direction ( ANODE TO CATHODE)".

Fig(a) working of an Ideal Diode

✱ DURING POSITIVE HALF CYCLE OF AC SUPPLY:-

⇨During the positive half cycle of ac supply P (anode) terminal of diode is connected to the +Vin and N (cathode) terminal of diode is connected to the-Vin of ac supply, so diode is in forward bias and start conducting.

⇨During forward biasing of diode current I is start to increasing and flows through the load.

✱DURING NEGATIVE HALF CYCLE OF AC SUPPLY:-

⇨During the Negative half cycle of ac supply P (anode) terminal of diode is connected to the-Vin and N (cathode) terminal of diode is connected to the +Vin of ac supply, so diode is in reverse biase.

⇨We know that diode doesn't allow to flow current in reverse biase, so that whole Negative half cycle of ac supply is BLOCKED across the Diode.

Fig (c) waveform of given circuit

• From the waveform we clearly understand that during positive half cycle of ac supply output is changed with respect to input but during the negative half cycle of ac supply, output remain ZERO during whole Negative half cycle.

➝So, from the above discussion and waveform we conclude that AN DIODE IT SELF SOWS NON LINEARITY, it means output does not follow input.

             ................Thank you 🙂................