I don't know what this electronic circuit does

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Discussion Overview

The discussion revolves around identifying the function of an electronic circuit and creating a truth table for it. Participants explore the circuit's purpose, clarify terminology, and share hints related to its operation.

Discussion Character

  • Homework-related
  • Debate/contested
  • Exploratory

Main Points Raised

  • One participant expresses uncertainty about the function of the circuit and requests pointers.
  • Another participant questions the terminology used for the outputs, specifically "sum" and "carry."
  • There is a discussion about the potential meanings of the labels "D" and "B" in the circuit.
  • A participant acknowledges an initial mistake in identifying the circuit as a half adder and notes the need for corrections in their submission.
  • Some participants share humorous attempts to identify the circuit using Google Images, indicating a struggle to find accurate information.
  • One participant mentions an exclusive XNOR gate as a component that may be relevant to understanding the circuit.
  • Several participants express frustration at not being able to resolve the question before a deadline.
  • A later reply references a hint about the difference between what the circuit does and what was initially thought.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the function of the circuit, and multiple competing interpretations remain. The discussion reflects uncertainty and varying perspectives on the circuit's operation.

Contextual Notes

There are unresolved assumptions regarding the circuit's design and function, as well as the definitions of terms used in the discussion. The lack of clarity in the circuit's identification contributes to the ongoing debate.

jacklll
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Member advised to use the formatting template for all homework help requests
I have a homework question that asks me to draw up a truth table for the attached circuit.

As you can see I did this (I think correctly). There is also an attached question asking what function the circuit serves - I am not sure what function this is

MOS0tys.png
Any pointers appreciated.
 

Attachments

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  • MOS0tys.png
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Hi jackill. :welcome:

Why did you call one output "sum" and the other "carry"?
 
Along the same lines as NascentOxygen's post, What do you think "D" and "B" could stand for?
 
Oops - I originally thought this was a half adder but later figured that wasn't correct. I forgot to change the boxes before I uploaded the image.
 
LOL, I tried to cheat and use Google Images to match on the circuit posted. This was the return... o0)

About 3 results (0.77 seconds)
ZUVi5E4U8u-u8g5wYGRJocjPniOdvmL6vf09akCcrpxbS3RLdLh6Fo_E18pp093CHxmy=s151.jpg

Image size:
800 × 450
No other sizes of this image found.
Best guess for this image: screenshot
 

Attachments

  • ZUVi5E4U8u-u8g5wYGRJocjPniOdvmL6vf09akCcrpxbS3RLdLh6Fo_E18pp093CHxmy=s151.jpg
    ZUVi5E4U8u-u8g5wYGRJocjPniOdvmL6vf09akCcrpxbS3RLdLh6Fo_E18pp093CHxmy=s151.jpg
    1.7 KB · Views: 808
jacklll said:
Oops - I originally thought this was a half adder but later figured that wasn't correct. I forgot to change the boxes before I uploaded the image.

I guess there is a difference between what this circuit does, and what you thought the circuit did.
 
berkeman said:
LOL, I tried to cheat and use Google Images to match on the circuit posted. This was the return... o0)

About 3 results (0.77 seconds)
View attachment 225514
Image size:
800 × 450
No other sizes of this image found.
Best guess for this image: screenshot
Narrow down the image to just the circuit:
Circuit.JPG

Then search again :wink:
 

Attachments

  • Circuit.JPG
    Circuit.JPG
    2.1 KB · Views: 491
  • Like
Likes   Reactions: berkeman
jacklll said:
Oops - I originally thought this was a half adder but later figured that wasn't correct. I forgot to change the boxes before I uploaded the image.
Hint: You weren't too far out of the ball park.
 
  • Like
Likes   Reactions: berkeman
a172a616d71c340624f7515b8b4e6d3a.jpg


what your not seeing is an exclusive xnor gate
 

Attachments

  • a172a616d71c340624f7515b8b4e6d3a.jpg
    a172a616d71c340624f7515b8b4e6d3a.jpg
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  • Like
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  • #10
OK guys, the deadline is up and I couldn't figure it out using your hints :(

Really appreciate the efforts though and I will format my question better next time as per the forum rules.
 
  • #11
jacklll said:
OK guys, the deadline is up and I couldn't figure it out using your hints :(
See the hint in post #7 above. :smile:
 
  • #12
jacklll said:
OK guys, the deadline is up and I couldn't figure it out using your hints.

My previous post contained an (intended) obscure hint:

George Jones said:
there is a difference

I figured it out form your truth table, and from

Janus said:
Along the same lines as NascentOxygen's post, What do you think "D" and "B" could stand for?
 

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