Search found 71 matches: deboo
Searched query: deboo
- Thu Jan 22, 2015 2:26 pm
- Forum: Pro Audio Design
- Topic: op amp parameter tradeoffs for charge amp with servos?
- Replies: 10
- Views: 31486
Re: op amp parameter tradeoffs for charge amp with servos?
Does a Deboo integrator function symmetrically with respect to both it's + and - inputs? Maybe it doesn't matter with open loop DC gain...(-) Aol vs. (+) (Aol+1)...or does that make for two different time constants depending ...
- Sun Oct 26, 2014 6:53 am
- Forum: Pro Audio Design
- Topic: Mic Preamp DC-Servo: The "backwards" way
- Replies: 48
- Views: 120000
Re: Mic Preamp DC-Servo: The "backwards" way
... OP07 instead of the single you show on this thread. http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6&t=256 Are referring to the Deboo? I think that for single-ended servo inputs and outputs I settled on one OP07. Could you be thinking about this one? This single-input Deboo using ...
- Sat Oct 25, 2014 12:04 pm
- Forum: Pro Audio Design
- Topic: Mic Preamp DC-Servo: The "backwards" way
- Replies: 48
- Views: 120000
Re: Mic Preamp DC-Servo: The "backwards" way
... bootstrap/servo using the bias resistors for injection for you to consider Olaf. One of the "problems" with using the Differential Deboo, aka DiffBoo, in a combined servo/bootstrap is that it will pass CM signals through with a gain of "1" at DC in addition to integrating ...
- Thu Oct 23, 2014 10:44 am
- Forum: Pro Audio Design
- Topic: Mic Preamp DC-Servo: The "backwards" way
- Replies: 48
- Views: 120000
Re: Mic Preamp DC-Servo: The "backwards" way
... a servo since its not DC-precise and can't be turned into an integrator. But its a similar concept. It seems at first glance that the Differential Deboo's common mode gain of +1 makes it serve both functions intrinsically except for the fact that the common mode gain isn't AC-coupled. That's a ...
- Wed Oct 22, 2014 4:58 pm
- Forum: Pro Audio Design
- Topic: Mic Preamp DC-Servo: The "backwards" way
- Replies: 48
- Views: 120000
Re: Mic Preamp DC-Servo: The "backwards" way
... isn't that almost what my circuit a few posts above does? Except that I have separate resistors for CM and DM signals. The idea was that a diff. Deboo servo will have a CM gain of 1x. So the output "control" voltages of the servo will move up and down with CM signals. That way R11 and ...
- Wed Oct 22, 2014 3:57 pm
- Forum: Pro Audio Design
- Topic: Mic Preamp DC-Servo: The "backwards" way
- Replies: 48
- Views: 120000
Re: Mic Preamp DC-Servo: The "backwards" way
One thing that occured to me while I was writing my initial post is that in case I use something like your differential Deboo integrator as servo (which has a common-mode gain of 1x) the whole servo would be "riding" on CM signals when monitoring the emitters and injecting ...
- Wed Oct 22, 2014 2:12 pm
- Forum: Pro Audio Design
- Topic: Mic Preamp DC-Servo: The "backwards" way
- Replies: 48
- Views: 120000
Re: Mic Preamp DC-Servo: The "backwards" way
... correction voltages. One thing that occured to me while I was writing my initial post is that in case I use something like your differential Deboo integrator as servo (which has a common-mode gain of 1x) the whole servo would be "riding" on CM signals when monitoring the emitters ...
- Mon Oct 20, 2014 8:52 am
- Forum: Document
- Topic: DC Servos and Digitally-Controlled Microphone Preamplifiers
- Replies: 12
- Views: 21388
Re: DC Servos and Digitally-Controlled Microphone Preamplifi
Well, now that its gone I can't remember: Did it take two switches to alter the time constant? The Differential Deboo Integrator only requires one switch to vary the C: http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6&t=559&p=6321 Just found a copy that I ...
- Tue Sep 23, 2014 3:32 pm
- Forum: Pro Audio Design
- Topic: op amp parameter tradeoffs for charge amp with servos?
- Replies: 10
- Views: 31486
Re: op amp parameter tradeoffs for charge amp with servos?
... preserve the speed of the charge transfer at the DC-coupled input but do not need that in subsequent voltage stages. Is that a question? 2) Does a Deboo integrator function symmetrically with respect to both it's + and - inputs? Maybe it doesn't matter with open loop DC gain...(-) Aol vs. (+) (Aol+1)...or ...
- Sun Sep 21, 2014 10:16 pm
- Forum: Pro Audio Design
- Topic: op amp parameter tradeoffs for charge amp with servos?
- Replies: 10
- Views: 31486
Re: op amp parameter tradeoffs for charge amp with servos?
... I want. I wish to preserve the speed of the charge transfer at the DC-coupled input but do not need that in subsequent voltage stages. 2) Does a Deboo integrator function symmetrically with respect to both it's + and - inputs? Maybe it doesn't matter with open loop DC gain...(-) Aol vs. (+) (Aol+1)...or ...