Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › need help with opa1612
New Posts  All Forums:Forum Nav:

need help with opa1612

post #1 of 4
1/12/10 at 4:36am
Thread Starter 
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?
Reply
post #2 of 4
1/12/10 at 7:20am
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.
Reply
post #3 of 4
1/12/10 at 12:57pm
Quote:
Originally Posted by chesterqw View Post
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.
Reply
post #4 of 4
1/13/10 at 12:11pm
Thread Starter 
Quote:
Originally Posted by diditmyself View Post
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
Reply
New Posts  All Forums:Forum Nav:
  Return Home
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › need help with opa1612