Pro Audio Design Forum

Thanks, you save me a lot of time pointing to me in the right direction. The Deboo can be fine, depending of the application and one cap only is nice for a differential. I abandoned the Deboo in an application where I want the servo loop to give a very best servo error correction. I bumped on the re...

@terkio We had a servo discussion that began with the OPA2188. I did a test check with slow op amps as simple integrators to see when/where they stopped being integrators due to bandwidth and load-driving. This exercise reinforced the point JR has made regarding the importance of passive input pole...

The WOM joke doesn't work on software people. A file may be Write Only.

Interesting: MCPV6V51.
CMOS Vdd 45V
Vos typical 2.4µV
Chopping clock rate of 100kHz
BW 2MHz
Low cost 1 buck

Thanks a lot for your help.
I sure need a "round tuit", I have high grass waiting for me.
At that place in the countryside my grand father had a couple of goats, the goat keep is still there, ready for new goats.

by mediatechnology » Sun Mar 24, 2019 8:07 am The measurement chain is: Soundcard Out > THAT1646 > -60dB U-Pad > ZTX851 Balanced Preamp > PCM4222EVM (96k/24b) >AudioTester Thanks for your detailed presentation of the THD measurements. How do you connect the PCM4222EVM (96k/24b) to the PC ? How does...

Audio1Man wrote: ↑

Mon Apr 01, 2019 12:28 pm

Thank god the Signetics 25120 Write-Only-Memory (WOM) is still working.
Duke

Write Only Memories are great to implement overflow bit buckets.

The advantage of the Birt is that the second op amp's noise appears in common mode, not differential. (Assuming good R match.) Interesting, good to know. Otherwise, I see no advantage in the Birt. We've talked a lot here about the advantage of passive input poles on servos which the non-inverting "...

the two amplifiers can be thought of as being in series I see a Birt topology. I do not use the Birt to make differential outputs from differential inputs. I use twice the same op amp circuit, one to derive Outa = K x ( Ina - Inb) the other to derive Outb = K x ( Inb - Ina). This is perfectly balan...

This is to use at the inputs of a mic preamp, for -hopefully- CMRR enhancement. Is this, good ? https://www.mouser.fr/datasheet/2/410/media-346070.pdf It is not specified as a CMC, but it has 1:1 turn ratio, is small, is specified over 20Hz 50KHz I was unable to find Common Mode Chokes, clearly made...