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Also, this appears to affect the entire CA line which, besides the four OTA’s, includes transistor arrays, opamps, video amps, amps with unusual circuit configurations and taps, special purpose radio and television circuits, and so forth.

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. They have very few vatasheet parts, but the ones they do have usually matter. Peavey publishes a master semiconductor reference with all their house numbers.

James Gideon at November 9, If you look at the data sheets for CA and CA, they aere similar enough that one would work for the other unless a certain feature was used. I suggested elsewhere that while it was more critical in the phasor, it wasn’t elsewhere in the amp. datassheet

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. But the output is a current source instead of a voltage source. There are many audio electronics applications for theand while admitedly most audio is digital now, the analog alternatives are where the high-end markets lie. These may be legit, especially if they are dqtasheet The portion of the circuit precedingresistors driven by the emitters of Q2 and Q3 to terminal 3 of the CA Note that In desperate repair situations, some of the LM’s pins can be wired into a ‘ PCB pattern and provide identical results.

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The CA fa3094 on the performance of the CA through datashet addition of anew device, the CAis useful in an extremely broad range of circuits in consumer and industrialapplications.

Don’s Blog: Last of the OTA’s

I didn’t look yet. The CA series parts are certainly old; I think most of them were introduced before the Nixon administration!!! Usually it’s just a case of some guys who are naturally kind’a jumpy. And in that also where it mattered. I want to suggest that these chips are too important to retire.

It was discontinued the year I designed the boards, and by the time I had made my first prototype built, I had to re-design again. Yeah, I know about that The US is the largest exporter of industrial controls – which use lots of linear ICs. Thanks for passing my comments on.

We need to insure we have enough product remaining to support the life time buys that are now incoming. This was not a big deal. This is essentially a dual version of the CA plus linearization diodes and output Darlingtons. Then, they discontinued the ANP. Is it the same as CA? Adjustment of potentiometer R determines the magnitude of the regulated output. For audio applications, dstasheet SSM works well.

If you want, the MCP has a well drawn internal circuit.

Or something like that; I was napping at the time. Originally Posted by Tone Meister. It datashdet a very nice input diode linearization circuit, low noise, low offset voltage, and it comes in matched pairs. I’m reading this with interest, as I built two synth VCAs that use the CA and I had to pick through a whole bunch of chips I originally bought way back in the ’80s.


CA3094 / CA3094E DIP8

So, the process is gone and is not worth the time and 10’s of millions to rebuild when today we are working with sub micron processes. In this application, the CAA is operated substantially.

Anyway, here’s hoping they work and that I now have some spares on hand. The portion of the circuit preceding transistors Q12operating point for class A operation.

The is clearly the most advanced and flexible. Anyone know of a suitable substitute? The market size for the CA part just will not return a profit for the cost. Today the wafer stock has been depleted to the point we have to withdraw the product. Darasheet, I did learn something. Since there are no trimmers or presets ca33094 adjust gain or threshold, I imagine this circuit needs selectedprobably with transconductance within a certain range, to work “just right”.

The process used to make those chips is very old and has been handed down through a number of corporate buyouts.

NTE seems the best hope. There are not many alternatives available from other manufacturers. Would this be equivalent or better then AE for audio range? Originally Posted by MarkusBass.