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Education is what you’re left with after you have forgotten what you have learned.

CA , Tube CA; R̦hre CA ID, IC РIntegrated

No problem in any other circuit, but in this particular one I got too much bleed-through with some chips. Out of frusteration, I designed my own fill-in replacement for the ANP. Problem is that such adjustment instructions are not used or applicable here, but much worse, not even Test Point voltages are shown.

What I really want is a replacement for the high end CA I’ll stick to my own circuit, due to the costant discontinuation of fixed ICs. If you want, the MCP has a well drawn internal circuit.

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I dattasheet designing a high order analog filter for the audio range. I realize that, but they are in critical roles in the preamp.

Datashret different odd chips and datashwet lack of suitable substitutes are definitely most interesting, the workarounds Enzo and Juan shared even more so.

Figure 9 shows voltage gain as a function of frequency with tone controls adjusteddwtasheet of the CA I might do that; it could have a lower noise input stage, built in exponential conversion for the programming current, a better linearization circuit, better current mirrors, that sort of thing. Looking at the Peavey schematic, I see that: One could, in theory “dead bug” them as viable replacements if the exact replacement can’t be sourced.


Perhaps NTE is ahead of the game, and indeed has a new source for these parts. It might actually work for my dozens-of-OTA’s project. Nah; more like a very weird chip that didn’t sell. There has been a lot of fearmongering from the electronic music crowd for a long time about electronic dtasheet parts going out of production. If you’re making a ‘s based synthesizer, you can use many different VCA circuits. Since there are no trimmers or presets to adjust gain or threshold, I imagine this circuit needs selectedprobably with transconductance within a certain range, to work “just right”.

And I’m sure the CA hasn’t been their top seller. I don’t buy datwsheet obsolete components from there. I want to use this one because they have a Pspice model so I can model it all in software, and TI still is selling this currently. The market size for the CA part just will not return a profit for the cost.

CA3094 Datasheet

I’ll be happy to consult on cw3094 a project. They claim their original and later on the LMN were “selected” for those roles. Knowing full-well that anything less thanwould not interest them, I didn’t pursue my case.

Or something like that; I was napping at the time. NJR wanted to know my annual usage of the ‘ Of course I see that Texas Instruments is discontinuing it Is this a conspiracy. Or better datazheet, an even higher quality OTA! The is clearly the most advanced and flexible.

Don’s Blog: Last of the OTA’s

I almost went to using the CA, but had problems with its manufacturer, Harris, who was a “competitor” in the broadcast industry at the time. I have had a problem with this chip for almost 11 years. None of the other chips comes close in these dxtasheet, so if you can only support one OTA chip, that’s the one.

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Originally Posted by nosaj. Originally Posted by Enzo. The closest thing to astill in production or recently enough is the LM and I think that the ANP was originally designed for television cs3094, which needed volume to be remote-controlled.

Originally Posted by g1. So, dtaasheet fellow analog enthusiasts, I suggest that you petition NJR for the ‘, ‘, and their like, if your quantity requirements are large enough to make it worth their while.

You can’t dynamically compress or expand in digital without generation of rounding noise Attached Files Mace VT. I am trying to recall if there is a Phillips part that emulates the ‘, but I can’t think of the number.

Post a comment Thanks for signing in. They are the people who made the effort to create a small workaround for the TL when TI stopped making them.

Eventually, I figured out how to make a cancelation circuit, and my VCA is now in the testing stages. Small and compact means unreliable and unserviceable. Then, they discontinued the ANP.

CA’ s for sale in batches of 50 on ebay, from Hong Kong just snatched up a bunch myself http: I also heard such stories about “specially selected” golden chips from respected manufacturers and after that I found out that the chip is noting more than plain NE But NJR obviously has a fab line capable of this “archaic” linear process. The bad news is that you have to use individual transistors – you could make a plug in module, but getting an exact module is almost impossible.

The time now is So you may believe, or not – it’s your choice.

Originally Posted by Tone Meister.