Symbol Meaning: "+" Enclosed in a Circle

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SUMMARY

The "+" symbol enclosed in a circle is definitively referred to as an "analog adder." This symbol represents the addition of analog signals, functioning similarly to an amplitude modulation process. The discussion highlights its use in electronic schematics, particularly in relation to operational amplifiers. The term "analog adder" is established as the correct nomenclature for this symbol in the context of analog signal processing.

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  • Understanding of analog signal processing
  • Familiarity with operational amplifiers (op-amps)
  • Knowledge of amplitude modulation techniques
  • Basic electronics schematic interpretation
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  • Research the function and applications of operational amplifiers in analog circuits
  • Study the principles of amplitude modulation in communication systems
  • Explore various analog signal processing techniques
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Electronics engineers, students studying signal processing, and anyone involved in designing or analyzing analog circuits will benefit from this discussion.

nimitzhunter
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Hi,
I am reading this paper and it has a symbol that I don't know what it's called. So for an x enclosed in a circle, it represents an analog multiplier. What does a "+" enclosed in a circle mean? I know it's add the analog signal, but what is it called?
 
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nimitzhunter said:
Hi,
I am reading this paper and it has a symbol that I don't know what it's called. So for an x enclosed in a circle, it represents an analog multiplier. What does a "+" enclosed in a circle mean? I know it's add the analog signal, but what is it called?

Welcome to the PF.

I'd just call it an analog adder:

http://www.mossbauer.org/images/Trends4.gif

.
 
Last edited by a moderator:
In other words, it's symbolic shorthand for a http://www.electronics-tutorials.ws/opamp/opamp_4.html" ? Or what?
 
Last edited by a moderator:
I think I get what it's used for. It's like amplitude modulation where you add together analog signals.
 

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