• Support PF! Buy your school textbooks, materials and every day products Here!

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
56,634
6,531
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 for: Capacitor and diode curcit for ac to dc voltage

Replies
2
Views
8K
  • Last Post
Replies
3
Views
1K
Replies
6
Views
2K
Replies
26
Views
910
  • Last Post
Replies
1
Views
654
  • Last Post
Replies
5
Views
2K
Top