Other Parts Discussed in Post: OPA1622 This post is co-authored by Bharath Vasan .
When we set out to create an operational amplifier (op amp) for headphone applications (which became the OPA1622 op amp), one of the first questions we needed to address was…
I posted the following comments the week that Bob passed away and thought it would be OK to post them again here...
I only knew Bob well for 5 years but I am honored to call him my friend. Bob and I presented together at the AES show in San Francisco…
John;
Wouldn't a more straightforward approach be to simply use a good FET op amp such as an OPA134 or a low noise CMOS type and take advantage of its very low input bias current to increase R2 by an order of magnitude or two? If R2 is 1M then C1 needs…
These types of capacitors are made from a roll of metal on film. One connection would be to the center/start of the roll and the other to the outside/end of the roll. The band indicates the outside connection and the idea is to connect that terminal to…
Have you ever tried to use a linear potentiometer (pot) as a volume control? Yikes! The volume jumps up much too rapidly. It requires a safe-cracker’s touch to adjust the volume to quiet listening levels. Thus the logarithmic potentiometer .
Our…
Those of us that are audio geeks would recognize right off that V = .707VAC, since the -3dB point of a single pole RC filter is where the resistance and capacitive reactance are equal in magnitude. You can answer the question by observation without recourse…
As we get ready to "gear up” here on the TI Precision Designs Hub (AKA "The Hub), we thought you might want to first learn a little about the experts who will be sharing their analog design tips with you in the coming weeks and months.…
Jens-Michael-- I’ll try once more. If properly connected, the outside foil does not pick up electrostatic interference because it is connected to a low impedance, imperturbable circuit node. Thus there is no (or much less) noise on the outside conductor…
I absolutely agree with Bubba here! I just had a near miss at a nightmare of having to ditch an otherwise successful 4 layer PC board of a recent project, using several LME49721 dual op amps to buffer the output of some digital potentiometers. These op…
