Search found 67 matches: deboo

Searched query: deboo

by mediatechnology
Tue Oct 01, 2019 7:07 am
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 53
Views: 12434

Flat Balanced Input Moving Coil Phono Preamp Construction Information

... would be double. The outputs of IC3 and IC4 feed both the output Phoenix connector through R21 and R22 as well as the input to the differential DeBoo correction servo. Differential Servo and Bias Network The Flat Balanced Input Moving Coil Preamp is direct-coupled from input to output. There ...
by mediatechnology
Thu Aug 08, 2019 2:16 pm
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 16990

Re: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps

Take a look here at some servo bandwidth tests I did with an OP07: https://proaudiodesignforum.com/forum/p ... t=20#p4999

You might want to read the full thread.
by terkio
Thu Aug 08, 2019 1:13 pm
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 16990

Re: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps

I compared using a differential Deboo integrator, and a non inverting two caps integrator. Integrating capacitor(s) insulation resistor does result in DC offset error in both cases. With the Deboo the resistor mismatch brings a similar effect. ...
by mediatechnology
Thu Aug 08, 2019 11:34 am
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 16990

Re: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps

Using a Deboo configuration, the unavoidable resistor mismatch results in an additional parasitic resistor across the capacitor of a positive or negative high resistance. Use precision resistors or a trim if its that critical. ...
by terkio
Thu Aug 08, 2019 9:21 am
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 16990

Re: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps

There is a catch in the Deboo integrator, differential or single. It is sensitive to resistor mismatch. This can be important or not, depending of the application. When in need for near perfect integrators, one needs capacitors with very ...
by mediatechnology
Wed Aug 07, 2019 5:16 am
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 16990

Re: A Differential Deboo Integrator to Servo the THAT1570/1583

"Consider The Deboo Integrator For Unipolar Noninverting Designs," Elliot Simons, Maxim Integrated Products, Electronic Design, March 18, 2002. The non-inverting Deboo integrator has a passive input pole which is important for audio ...
by mediatechnology
Sun Apr 07, 2019 8:20 pm
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 498
Views: 237584

Re: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851

... board. I made the hole pattern identical so it will be possible to switch out boards between MM and MC boards in the same metalwork. I scaled the Deboo capacitor and resistors to accommodate a 5 mm 0.33µF polypropylene which is the largest value in that case size. C7 and C22 can also accept 8 ...
by terkio
Fri Apr 05, 2019 2:25 pm
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 18776

Re: Op amp matching

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 ...
by mediatechnology
Fri Apr 05, 2019 1:15 pm
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 18776

Re: Op amp matching

My point was at HF where they stop being capacitors and become "inductive."

The Deboo works fine for what I want. I like its passive input pole.
by JR.
Fri Apr 05, 2019 12:23 pm
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 18776

Re: Op amp matching

... of this additional real pole depends on the servo topology, if the signal feeding it is already adequately LPF it could be redundant. JR _The Deboo's resistance tolerances turns it into an equivallent resistor leakage at the cap. This is the reason, I have abandonned the Deboo. _The input ...