logic circuit

1. decoder from multiplexer

Hi, How can I implement a 2-bit decoder using a 4 to 1 multiplexer ?
2. Need help on a logic circuit - logisim (or any simulator)

Hello everyone, I'm new here. So I've got this assignment that asks me to use JK flip-flops in order to create a circuit that obeys the following truth-table: The thing is, I have no idea on how to get these results at all. From what I understand, first two lines imply that PRE and CLR are both...
3. Beginner's question about a NOT inverter

Hello, This is my first post here. I'm trying to learn electronics on my own via different sites At the moment, I'm trying to understand how a NOT inverter works. I perfectly understood what it was used for, but something escapes me on this diagram...
4. D

How to draw this logic circuit?

Hello. This is JK flip-flop. I have to convert it into D flip-flop, that it does the same what JK does. Then I have to draw a logic circuit of D flip-flop. I don't know what to do, can you help me?
5. Arithmetic - Absolut Value

I want to construct a circuit that calculates the absolute value of a signed 4-bit number in two's complement! So the logic here : assuming we have B = b3 b2 b1 b0 . If b3 is '1' then then b is already in 2s complemnt and should be assigned directly to the output else if b3 is equal to '0' then...
6. Trying to figure out LVCMOS Interface - Will this work?

Hi, I am trying to see if this interface will work. I am worried about the Vol to Vih relationship as there is no margin. The vendor of the driver thinks it will be ok. Here are the parameters: Driver: Voh=2.3V (min), Vol=0.8V(max) Receiver: Vih=2.0V(min), Vil=0.8V(max) So as you can see...
7. Logic circuit projects issue

Hello everyone, i have these two school projects and i tried my best to simulate them in Proteus, and so far no desired output :( Can you pls help me fix the issues they might have? First project is about making a two-digit binary adder and subtractor with seven segment display by using full...