Pro Audio Design Forum

Looks like Mouser has some inventory of TDK CUT35: https://www.mouser.com/c/?q=cut35

They're functionally very similar.
I think the advantage of the Birt using op amps is that it is lower cost and not single-sourced.
For DIY there is also the through-hole advantage.
The overall CMRR performance of both is limited by the resistors.

Updated schematics and links in OP.
Will be updating construction and test docs soon...

Some Applications of the Birt Fully Differential Amp



The modulator driver has the "internal" inverter sense input brought out and connected after the upper stage's build-out resistor.

Thank you for doing that.
On later projects I started using Yageo or KOA from Mouser but haven't gone back to update the old discontinued Xicon numbers.
Do you have a link to the updated BOM?

Visualizing the Birt Line Receiver As A Fully Differential Amp The Birt Line Receiver is a very useful circuit but the topology is confusing particularly when the polarity inverting stage is drawn backwards. When drawn this way the Birt looks like M.C. Escher's "Drawing Hands." By rearran...

Hi Wayne, did you ever make up a PCB for this filter? Kind regards Mike Thanks for asking. I've been waiting for someone to ask. I'll bump it up the list - I want a 90 degree filter and I get an empty Protoboard back by making a board. Will try to fit it in a small format board. Curious: Will you n...

New York City Teachers Who Refused The COVID Jab Had Their Fingerprints And Personnel Files Sent To The Corrupt FBI The conservative legal group Alliance Defending Freedom (ADF), which is defending the teachers in state court, said the New York Department of Education (DOE) flagged the personnel fi...

The 22KΩ resistor to ground raises the common mode impedance of the input which can improve LF common mode rejection by reducing the matching requirements of the input capacitors. You can relax the value of Cg considerably owing to both the HP filters you intend to use and also by reducing the maxim...

Another thing worth pointing out is that your gain pot will have a minimum "hop-off" resistance in the wiper. On a new pot this is usually 2-3Ω. At maximum gain the control may also be a bit twichy. Since you're wanting to use a 1512 with a pot for Rg you might be better off putting some g...