volta
Well-known member
- Joined
- Dec 10, 2004
- Messages
- 118
I am trying to learn or understand the most accurate way of measuring dc offset voltage at the input of my output transformer.
In other words,measure the offset coming out of the buffer/servo to see if it is low enough to drive the output transformer without the need for coupling caps.
Under 1mv is rule of thumb to keep distortion at bay.
My ears tell me it is good but I would still like to measure it accurately with a multimter.Or at least very close.
O.K. this guy says do it like this for his headphone amp:
http://tangentsoft.net/audio/input-cap.html
Is it that simple?
Or do you have to proceed in this manner?
http://www.ele.uri.edu/Courses/ele343/lab/lab4/lab4.html
If you ground an input on any opamp in your circuit to measure the offset you would have to take it out of the circuit to do this.Right?
Would like to measure dc offset voltage with entire circuit complete.
Possible?
In other words,measure the offset coming out of the buffer/servo to see if it is low enough to drive the output transformer without the need for coupling caps.
Under 1mv is rule of thumb to keep distortion at bay.
My ears tell me it is good but I would still like to measure it accurately with a multimter.Or at least very close.
O.K. this guy says do it like this for his headphone amp:
http://tangentsoft.net/audio/input-cap.html
Is it that simple?
Or do you have to proceed in this manner?
http://www.ele.uri.edu/Courses/ele343/lab/lab4/lab4.html
If you ground an input on any opamp in your circuit to measure the offset you would have to take it out of the circuit to do this.Right?
Would like to measure dc offset voltage with entire circuit complete.
Possible?