How to use 4-bit parallel adders to perform 2Cs' subtraction?

  • Thread starter Thread starter chipmunk22
  • Start date Start date
  • Tags Tags
    Parallel
chipmunk22
Messages
15
Reaction score
0
Does anyone know how to use 4-bit parallel adders to perform 2Cs' subtraction? Thanks.
 
Last edited:
Engineering news on Phys.org
Just complement one input with inverters and add it to the other input.
 
oh i see. Thks!
 

Thread 'Following up on the recent thread about Earth Resistance measurements'

I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
View full post »
Thread 'Electromagnet magnetic field issue'

Thread 'Electromagnet magnetic field issue'

Hi Guys We are a bunch a mechanical engineers trying to build a simple electromagnet. Our design is based on a very similar magnet. However, our version is about 10 times less magnetic and we are wondering why. Our coil has exactly same length, same number of layers and turns. What is possibly wrong? PIN and bracket are made of iron and are in electrical contact, exactly like the reference design. Any help will be appreciated. Thanks. edit: even same wire diameter and coil was wounded by a...
View full post »
Thread 'Beauty of old electrical and measuring things, etc.'

Thread 'Beauty of old electrical and measuring things, etc.'

Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old things that I keep and now reviving. Old things need to work to see the beauty. Here's what I've done so far. Two views of the gadgets shelves and my small work space: Here's a close up look at the meters, gauges and other measuring things: This is what I think of as surface-mount electrical components and wiring. The components are very old and shows how...
View full post »

Similar threads

Designing a 2-bit full adder using nothing but NAND gates?
Replies
15
Views
9K
8-Bit Ripple Carry Multiplier using 4-Bit Adders
Replies
6
Views
7K
Ripple-Carry Adder for 2s complement
Replies
1
Views
2K
Comp Sci Digital Logic 8 Bit Full Adder Circuit
Replies
5
Views
3K
MHB Optimizing Carry-Skip Adders for Minimal Delay
Replies
3
Views
1K
Full Adder modified to make Full Subtractor
Replies
2
Views
27K
How many Parallel Resistive Loads I connect in a 110V branch?
Replies
14
Views
1K
Where to find sources on Full Adders
Replies
1
Views
2K
Engineering Selecting operation code for arithmetic circuit that uses the least amount of transistors and other inquiry
Replies
4
Views
1K
Make half and full adder without chips
Replies
15
Views
4K

Hot Threads

Recent Insights

Back
Top