advantage and disadvantages of phototransistor pdf
#1

[b]advantage and disadvantages of phototransistor pdf[/b]
Reply
#2
The phototransistors look like the normal transistor, except for the fact that the base terminal is not present in the case of the phototransistor. Photo-transistors convert incident light into photocurrent. Instead of providing the base current to activate the transistor, the light rays are used to illuminate the base region. The base terminal consists of the material that shows sensitivity to light. The circuit symbol of the phototransistor is similar to that of the conventional transistor, but the base terminal can be omitted. The two arrows pointing towards the phototransistor indicate that the phototransistor is triggered by the light that falls on it.

Advantages of the phototransistor

1. Higher efficiency compared to the photodiode: the efficiency of the phototransistor is greater than that of the photodiode. This is because the current gain in the case of the phototransistor is greater than that of the photodiode, therefore, even if the amount of incident light in both is the same, the phototransistor will generate more photocurrent than the photodiode.
2. Faster response: the response time of the phototransistor is greater than that of the photodiode, this provides the advantage of using the phototransistor in our circuit.
3. Lower noise interference: the main disadvantage of photodiodes, especially that of avalanche photodiodes, is that it is not immune to noise interference. On the contrary, phototransistors are immune to noise interference.
4. Economical: the phototransistor is less expensive than other light sensitive devices, therefore, it is economical to use phototransistors in light sensitive applications.
5. Less complex: the phototransistor design is simple and less complex compared to LDR and photodiodes.

Disadvantages of phototransistors

1. Effect of electromagnetic energy: the efficiency of phototransistors decreases when the electromagnetic field interferes in the region of operation. This results in poor conversion efficiency of the phototransistors.
2. Low efficiency at high frequency: due to the large area of the base region of the collector, the capacitance increases. Because of this, it can not effectively convert light into photocurrent in higher frequency ranges.
3. Slower: phototransistors are slow compared to photodiodes. Photodiodes can convert light into photocurrent much faster than phototransistors.
4. Electric peaks: arises in phototransistors more frequently compared to photodiodes.
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
Popular Searches: basic of l14f1 phototransistor wikipedia, phototransistor advantages, phototransistor 2n5777 circuit diagram, principle construction and working of phototransistor in pdf freedownload, working principle of phototransistor wikipedia, arduino laser phototransistor, ir phototransistor op amp circuit,

[-]
Quick Reply
Message
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  well-spring some homemade barbecue backchat and moistureless rubs and the actuality 0 1,026 10-09-2019, 05:48 PM
Last Post:
  agent some homemade barbecue cheek and prosaic rubs and suit 0 942 10-09-2019, 07:04 AM
Last Post:
  pass some homemade barbecue coolness and arid rubs and module 0 898 09-09-2019, 06:35 PM
Last Post:
Wink disadvantages of plastic in malayalam essay 2 2,429 29-12-2018, 06:07 AM
Last Post:
  disadvantages of smart dustbin 0 644 27-10-2018, 03:47 PM
Last Post: Guest
  foot step bearing information advantages disadvantages application 0 684 21-10-2018, 08:54 PM
Last Post: Guest
  advantages n disadvantages of bhakra dam 0 652 03-10-2018, 08:04 PM
Last Post: Guest
  dynamics of machinery by jbk das and seeenivas Murthy pdf download 0 1,010 03-10-2018, 08:08 AM
Last Post: Guest
  advantages and disadvantages mains failure alarm circuit in pdf 0 780 01-10-2018, 11:48 PM
Last Post: Guest
  can protocol interview questions and answers pdf 0 5,230 24-09-2018, 11:16 PM
Last Post: Guest

Forum Jump: