Hello,
Would like some help. Have been designing an amp using Bob Cordells book and have finally got somewhere after many hours. It is a double EF output with darlington VAS and darlington Vbe multilier. It passes the phase and gain margin tests in Bob's book.
Have been doing some THD simulation and get the following results.
All tests have been into a 4 ohm load at +/- 20V output.
1Khz sine wave = 0.02%
10Khz sine wave = 0.8%
20Khz sine wave = 0.8%
Unloaded 1Khz sine wave = 0.0001%
I'm thinking I may have a slew rate issue.
Are these anywhere near respectable?
The only thing is that the the odd harmonics dominate.
Paul
Would like some help. Have been designing an amp using Bob Cordells book and have finally got somewhere after many hours. It is a double EF output with darlington VAS and darlington Vbe multilier. It passes the phase and gain margin tests in Bob's book.
Have been doing some THD simulation and get the following results.
All tests have been into a 4 ohm load at +/- 20V output.
1Khz sine wave = 0.02%
10Khz sine wave = 0.8%
20Khz sine wave = 0.8%
Unloaded 1Khz sine wave = 0.0001%
I'm thinking I may have a slew rate issue.
Are these anywhere near respectable?
The only thing is that the the odd harmonics dominate.
Paul