Jump to content
Electronics-Lab.com Community

Regarding SCR gate voltage


Recommended Posts

Hi,

I have implemented the ckt as attached in 1.jpg file. As shown in ckt, the d.c supply which gives the voltage to gate terminal is kept at 0 v. But when i am connecting the supply terminal to gate terminal its gate voltage is increase from 0 volt to 3.6 volt ( 5 volt(voltage devider) - IR(1kohm) ). So now if i am increase the gate voltage to fire SCR, voltage across anode to cathod will not decrease abruptly as per the characteristic of SCR but it will decrease slowly as we increase the gate voltage and reach to 0.7 volt when gate voltage is around 10.7 volt. Can i say SCR is fired?

Now i have implement the ckt as attached in 2.jpg file. At that time when i am connecting the supply terminal to gate terminal its gate voltage remains at 0 volt and when increase gate voltage voltage across anode to cathod will decrease abruptly as per the SCR characteristic.
Can any one tell me what is the reason?

post-51935-14279144176045_thumb.jpg

post-51935-14279144176263_thumb.jpg

Link to comment
Share on other sites

  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...