Javier Herrero wrote:
Yes, I'm also familiarized with space qualified EEE components, and lately I hear the word "heritage" more frequently that I would like ;) The only design I've made for aircraft electronics was for a commercial aircraft application, and the components selection was a lot less restringent than for space (I think also that the system for which I worked was also not classified as very critical), so perhaps the decision to use a 4046 at its limit was driven by that heritage reasons, and that really there was not too much better things around :) The venerable 4046 has been around for quite a long time...
Surely would other alternatives to the 4046 be possible even within the scope of heritage components? DBM and active mixers should be available and useable. The CCO (it's actually current controlled with a V/I conversion) could also be replaced. Logical gates can also be used to replace the phase-detector. Not as handy, but the aspect of the 4046 causing trouble could be circumvented if needed. Another aspect is to improve its performance by design.
But maybe I misinterprent the heritage aspect her in that it is designs rather than components that is inherited?
Cheers, Magnus _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
