[chesterqw]

from TI's website, i conclude that it is a bipolar opamp.
read on tangentsoft that bipolar opamps will cause high DC offset if something is not designed properly?
now i am afraid of using it in my P3 or replacing the opamp in my ordnance :x
is it possible to measure DC offset at the headphone out of the amp?

 

[diditmyself]

Many modern bipolar input opamps have such low input bias currents that DC offset wont be a problem in a headphone amp, including OPA1612.

You can use Electronics Calculators to calculate the DC offset.

 

[diditmyself]

Quote:

Originally Posted by chesterqw /img/forum/go_quote.gif now i am afraid of using it in my P3 or replacing the opamp in my ordnance :x is it possible to measure DC offset at the headphone out of the amp?

Forgot to answer your question. Yes, it's easy to measure DC-offset with a voltmeter. Use a mini-mini cable and put the black probe on ground and the red probe on tip (left) or ring (right). DC-offset is usually in the mV range.

 

[chesterqw]

Quote:

Originally Posted by diditmyself /img/forum/go_quote.gif Forgot to answer your question. Yes, it's easy to measure DC-offset with a voltmeter. Use a mini-mini cable and put the black probe on ground and the red probe on tip (left) or ring (right). DC-offset is usually in the mV range.

cool, many thanks