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Dtasheet Tillman at July 16, I have a number of projects and articles in the pipeline that use CA’s, and I’ll keep on course with those. I have a question. Note that In desperate repair situations, some of the LM’s pins can be wired into a ‘ PCB pattern and provide identical results.

CA3094 Datasheet PDF

OTA’s are not complex devices, although a substantial amount of hand matching of transistor will be required, but that’s not difficult. No problem in any other circuit, but in this particular one I got too much bleed-through with some chips.

Heck, the original Moog modulars were all discrete. Also, this appears to affect the entire CA line which, besides the four OTA’s, includes transistor arrays, opamps, video amps, amps with unusual datashee configurations and taps, special purpose radio and television circuits, and so forth.

Anyway, here’s hoping they work and that I now have some spares on hand. Don Tillman at November 10, I have two of them at home but it may be easier to buy it here: We are sorry but what FAB equiptment we did not move to Florida, we sold with the building. Perhaps NTE is ahead of the game, and indeed has a new source for these parts. Or better yet, an even higher quality OTA!

Superb, and good bedtime reading. 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. Originally Posted by km6xz. This time I had to use datasyeet LM and a resistor current circut to make the inversion for the compressor.


By the way does anyone know if there are pspice models for CA or ??

The stupidity of the IC industry is that they neglect to understand that the VCA is one datasehet that does not work well in digital.

I don’t buy any obsolete components from there. It’s a very different internal design, with very different characteristics, and it is used in a different way. It’s been thirty years, man; surely we can make some improvements.

Originally Posted by The Dude. Would this be equivalent or better then AE for audio range? EHX also used the in many products. Somebody picking up the ? 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.

The LM has been discontinued. Dear Don, I will pass on your concerns but please understand, these CA family of products were developed by RCA on a very old and obsolete fab process that is long since been discontinued and the fab plant was shut down and sold off. Nah; more like a very weird chip that didn’t sell. I suggested elsewhere that while it was more critical in the phasor, it wasn’t elsewhere in the amp.

I am going to try to build it, and see if it works! The guys who the fab was sold to? There are not many alternatives available from other manufacturers.

Thanks for passing my comments on. Out of frusteration, I designed my own fill-in replacement for the ANP. The is also capable of functionally replacing any of the other OTA models, ignoring the obvious pin-compatibility issues.


Usually it’s just a case of some guys who are naturally kind’a jumpy. Now you can comment. I want to suggest that these chips are too important to retire.

CA IC DATA REQEST – Datasheet/Parts requests – Community

You got the phasor working, now replace the les criticalone datashet stole. Education is what you’re left with after you have forgotten what you have learned.

This is essentially a dual version of the CA plus linearization diodes and ddatasheet Darlingtons. So, I don’t know if those chips will work or not. Maybe this is why the chip industry is going to china! This was not a big deal. If needed, you can increase U2b gain increasing R86 or decreasing R85 so it roughly matches the other channel, built around U Look at the data sheet, it is an op amp with an output transistor.

Substitute for CA/LMN OTA

The portion of the circuit precedingresistors driven by the emitters of Q2 and Q3 to terminal 3 of the CA Try to get other foundries to manufacture OTA chips. So you may believe, or not – it’s your choice.

The closest thing to astill in production or recently enough is the LM and In summary, I think it would be a datqsheet win to keep the CA in production, for all the standard business reasons, but also because the chip is culturally and educationally important, and it would give Intersil a great repuation.

Ok, enough ranting and raving. Until then, it won’t appear on the entry. The market size for the CA part just will not return a profit for the cost.

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