# Output voltage waveforms of diode circuits

Discussion in 'Homework Help' started by boks, Oct 28, 2008.

Oct 10, 2008
218
0
2. ### mik3 Senior Member

Feb 4, 2008
4,846
63
Is Vi an AC voltage source?

Do you assume that the diodes are ideal?

3. ### boks Thread Starter Active Member

Oct 10, 2008
218
0
Yes, the diodes are ideal. Their turn on voltage is 0.7 V. Vi = Vosin(wt)=5sin(wt)

I assume circuit A will clamp voltages lower than - 0.7 V, while for circuit B the output will be clamped to +- 0.7 V? No idea when it comes to C though.

4. ### mik3 Senior Member

Feb 4, 2008
4,846
63
Circuit A will clip voltages greater than 0.7 volts
Circuit B will clip voltages greater than 0.7V and less than -0.7V
Circuit C will clip voltages greater than 2.7V and less than -2.7V

5. ### Ron H AAC Fanatic!

Apr 14, 2005
7,050
657
Circuit C will clip voltages greater than 2.7V and less than 1.3V.
This was homework. We should have asked to see the OP's answers first.

6. ### mik3 Senior Member

Feb 4, 2008
4,846
63
Thanks RonH for the correction, i was not very careful.

7. ### boks Thread Starter Active Member

Oct 10, 2008
218
0

You mean greater than 2.7V and less than -1.3V?

8. ### beenthere Retired Moderator

Apr 20, 2004
15,815
282
No, he meant just what he posted. You might get some useful knowledge by looking into the conduction characteristic of a diode.