so i have a bunch of these long tailed pair/cascode amplifiers in my collection, and i have not yet had the chance to try them out. so i was wondering if anyone else has used these IC's for audio use outside of radio frequency magic, before i re-invent the wheel here.
i imagine using them as OTA's, phase inverters and overdriving gain stages.
(http://www.datasheetq.com/image/Harris/CA3028A.png)
i love that mine all came in the TO-99 package, and therefore have a +3 mojo bonus on all stats
cheers
Nothing comes to mind. I remember those being used for FM radios, good quality ones. I checked the datasheet for the input offset voltage and it says "controlled for input offset voltage" but a value wasn't given - maybe need to try some datasheets from different companies.
I don't even remember seeing those used for test instruments, that job often went to MC1496 and all that family. You might find a ring modulator for those.
The only tip I have is to look at similar chips. There's a lot. I'm sure Philips had some (no doubt TAxxxx). I don't remember any cool application notes just a lot of RF circuits. Once in a blue moon you will find a cool circuit in the old Electronics Design Circuit compilations, which are on the worldradiohistory site, but there's not a lot of audio there.
i figured.
ill probably end up using it as a LFO variable wave folder in a fuzz/tremolo circuit i have in mind.
cheers