5 Methods to use a transistor as Diode.

In summary, there are five ways in which a transistor can be used as a diode: Collector Base with emitter open, Emitter Base with collector open, Collector Emitter Short, Collector Base short, and Base emitter Short. These methods involve different configurations of the transistor and its pins to function as a diode. It is important to read a detailed data sheet of a transistor and consider different parameters to understand how a transistor can be substituted for a diode.
  • #1
anonymoussome
59
0

Homework Statement


List at least five methods by which a transistor can be used as a diode.


Homework Equations



N/A

The Attempt at a Solution


I know three configurations viz. Collector Emitter Short, Collector Base short and Base emitter Short..
What would be the remaining two configurations.
 
Physics news on Phys.org
  • #2
For me the word methods is ambiguous and I'm not sure your interpretation of it as configurations is correct either. Perhaps by methods they mean ways as in 5 ways by which a transistor can be used as a diode. This would suggest at least 5 different circuits in which a transistor functions as a diode in different ways. Can you think of 5 different functions of a diode and how a transistor might be substituted?

It seems to me a good place to start would be reading a detailed data sheet of a transistor and trying to think of all the different ways those parameters might apply to a diode.
 
  • #3
skeptic2 said:
For me the word methods is ambiguous and I'm not sure your interpretation of it as configurations is correct either. Perhaps by methods they mean ways as in 5 ways by which a transistor can be used as a diode. This would suggest at least 5 different circuits in which a transistor functions as a diode in different ways. Can you think of 5 different functions of a diode and how a transistor might be substituted?

It seems to me a good place to start would be reading a detailed data sheet of a transistor and trying to think of all the different ways those parameters might apply to a diode.
http://picasaweb.google.com/lh/photo/WvcXS-9MEtIxp8zYh6Hpew?authkey=Gv1sRgCIzu-ov979TfqQE&feat=directlink [Broken]

I got the answer on IEEE...thanks anyways
 
Last edited by a moderator:
  • #4
skeptic2 said:
For me the word methods is ambiguous and I'm not sure your interpretation of it as configurations is correct either. Perhaps by methods they mean ways as in 5 ways by which a transistor can be used as a diode. This would suggest at least 5 different circuits in which a transistor functions as a diode in different ways. Can you think of 5 different functions of a diode and how a transistor might be substituted?

It seems to me a good place to start would be reading a detailed data sheet of a transistor and trying to think of all the different ways those parameters might apply to a diode.

I got the other two also...
Use only 2 pins...i.e. Collector Base with emitter open
and
Emitter Base with collector open...thanks anyway
 
  • #5
yes, and the 5 methods?
 
  • #6
Collector Base with emitter open

Emitter Base with collector open

Collector Emitter Short

Collector Base short

Base emitter Short

And yes you may call them 5 ways if not methods!
 

1. What is a transistor and how does it function as a diode?

A transistor is a semiconductor device that can amplify or switch electronic signals. It has three layers of doped material, namely the emitter, base, and collector. When used as a diode, the base and collector are connected, and the emitter serves as the output. The transistor works as a diode by controlling the flow of electrons between the emitter and collector using the voltage applied to the base.

2. How do you use a transistor as a diode?

To use a transistor as a diode, you need to connect the base and collector together and use the emitter as the output. This creates a PN junction between the base and emitter, which controls the flow of electrons. The voltage applied to the base determines the resistance of the PN junction, allowing you to use the transistor as a diode.

3. What are the advantages of using a transistor as a diode?

Using a transistor as a diode has several advantages, including its smaller size, faster switching speeds, and higher efficiency. Transistors also have a lower forward voltage drop compared to traditional diodes, making them more suitable for certain applications.

4. Can any type of transistor be used as a diode?

Not all transistors can be used as diodes. Only bipolar junction transistors (BJTs) and metal-oxide-semiconductor field-effect transistors (MOSFETs) can be used as diodes by connecting the appropriate terminals. Other types of transistors, such as junction field-effect transistors (JFETs) and insulated-gate bipolar transistors (IGBTs), do not have the necessary structure to function as a diode.

5. What are the other methods of using a transistor as a diode?

Aside from connecting the base and collector, there are four other methods of using a transistor as a diode. These include connecting the base to the collector through a resistor, connecting the base to the collector through a capacitor, connecting the base to the collector through a zener diode, and using a transistor in a Darlington pair configuration. Each method has its advantages and disadvantages and is suitable for different applications.

Similar threads

  • Engineering and Comp Sci Homework Help
Replies
3
Views
1K
Replies
5
Views
2K
  • Engineering and Comp Sci Homework Help
Replies
3
Views
2K
  • Engineering and Comp Sci Homework Help
Replies
6
Views
3K
  • Engineering and Comp Sci Homework Help
Replies
5
Views
1K
  • Engineering and Comp Sci Homework Help
Replies
11
Views
2K
  • Engineering and Comp Sci Homework Help
Replies
1
Views
2K
  • Engineering and Comp Sci Homework Help
Replies
6
Views
1K
  • Engineering and Comp Sci Homework Help
Replies
3
Views
2K
  • Engineering and Comp Sci Homework Help
Replies
4
Views
2K
Back
Top