Search found 71 matches: deboo

Searched query: deboo

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: 499
Views: 773037

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: 47588

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: 47588

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: 47588

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 ...
by terkio
Fri Apr 05, 2019 11:48 am
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 47588

Re: Op amp matching

... filering noise ). May be I am missing something, I must look harder in the informations from the servo discussion with the OPA2188. Notes: _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 ...
by terkio
Mon Apr 01, 2019 9:20 am
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 47588

Re: Op amp matching

... in an overview of the solutions for a differencial integrator, to know the advantages and drawbacks. So far I have experimented with the diff Deboo, then switched to the diff non-inverting "simple" ( 2 Op-amps, 2 Caps, 1 Resistor as described above in this thread ).
by terkio
Fri Mar 29, 2019 10:38 am
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 47588

Re: Op amp matching

... Good to know about beats from asynchronous clocks, an effect one can hardly guess beforehand. BTW: Which dual servo do you use ? A differentiel Deboo integrator ( that has one cap ) or a more usual differential integrator with two caps ?
by terkio
Sun Mar 17, 2019 12:42 pm
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 47588

Re: Op amp matching

... duals like OPA2277 or ADA4522-2. This paper gives me insights too, about how Vos Ibias Ios come in differential integrator circuits. Differential Deboo or else. Thermal drift: When the two amps are in a dual chip, the two op amps are at near the same temperature, there should be about no residual ...
by terkio
Sat Mar 16, 2019 4:45 pm
Forum: Pro Audio Design
Topic: Op amp matching
Replies: 44
Views: 47588

Op amp matching

In the design of an integrator circuit whether it is a Deboo or another implementation, a most important op amp characteristic is low Vos. For a balanced integrator that uses two op amps, the two Vos, if exacly equal, would provide an integrator with ...
by mediatechnology
Tue Mar 12, 2019 8:22 am
Forum: Pro Audio Design
Topic: A Low Noise Balanced Input Moving Coil Preamp Using the ZTX851
Replies: 499
Views: 773037

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

... I need to think through the consequences in a different context. A servo that introduces a common mode voltage might be better. One thing that the Deboo offers is that it has a passive input pole and uses a single C. A Deboo with a Vcm input might be useful later on.