Capacitor and diode curcit for ac to dc voltage

  • Thread starter nokia8650
  • Start date
  • #1
219
0
http://img42.imageshack.us/img42/2461/49889005.th.jpg [Broken]

My question is, why does the dc voltage vary with time in this way? Ply it is something to do with the diode allowing current to flow when it has 0.7V or more across it, allowing the capacitor to charge, and when the voltage drops to below this, the capacitor discharges, however could someone please provide a more comprehensive explanation?

Thanks alot in advance.
 
Last edited by a moderator:

Answers and Replies

  • #2
berkeman
Mentor
62,279
13,037
http://img42.imageshack.us/img42/2461/49889005.th.jpg [Broken]

My question is, why does the dc voltage vary with time in this way? Ply it is something to do with the diode allowing current to flow when it has 0.7V or more across it, allowing the capacitor to charge, and when the voltage drops to below this, the capacitor discharges, however could someone please provide a more comprehensive explanation?

Thanks alot in advance.

Your explanation is correct. The droop between the power input part is at the RC time constant specified by the load R and the storage C.
 
Last edited by a moderator:

Related Threads on Capacitor and diode curcit for ac to dc voltage

  • Last Post
Replies
3
Views
1K
Replies
6
Views
3K
Replies
26
Views
1K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
2
Views
9K
  • Last Post
Replies
5
Views
940
  • Last Post
Replies
1
Views
5K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
5
Views
4K
Replies
5
Views
783
Top