complementary of the analog signal (symbol)

[an_82]

Hello every one,
I have a question about a symbol.
We know that, complementary of a digital signal is shown by bar on that signal.
How about an analog signal. Suppose that we have a reference current of Iref, the output current is Iout=out1. Now we would like to have Iref-Iout. How can we display this value with respect to out1. May we mention by bar(out1 bar)?

Best regards,
an

 

[dick_freebird]

All that convention is pretty hard to type - no overbar
handy, last I looked. Me, I append 'b' to a complement
type signal. For "bar". But that's nothing I know of as
"conventional".

 

[an_82]

Dear dick_freebird,
Thanks for your reply.
Of course these symbols are "conventional", you know, I am writing an academic paper, so I have to use
accurate symbols. Are you sure we can use "bar" for complementary of analog signal ?

 

[FvM]

In digital logic, the meaning of complemented signal symbols is more or less self-explanatory, at least within a certain logic level standard. This is rarely the case in the analog world. As in the digital domain, there's an implicite common mode signal level, but often ambiguous.

Using symbols instead of explicite signal descriptions brings up a risk to confuse the reader.

 

[an_82]

Suppose that there is a reference current of 10uA, or consider the normalized value (equal to 1). the output of the circuit is 6uA, I named it: "out". Now, at the output, we need "Ref-out" (10u-6u), how can I display the output? by which parameter? out with bar on that?

 

[erikl]

As already stated above, there's no convention for the designation of complementary or composite signals. Just explain your designation name exactly. I think "ref-out" is quite a good mnemonic for "reference minus out".