I have a question about the XOR gates. Are those XOR gates for doing 2's complement (i am thinking in this way)?
But I know that 2's complement is not just inverting 1 and 0, but also needs to add 1 after that. It seems that the above design cannot do that?
Hi, it's me again.
Now I am going to design a 4-bit magnitude comparator using just ONE 4-bit adder and infinitely large number of gates (AND, OR, NOT, NAND, NOR, XOR, XNOR) for signed numbers (negative binary).
A > B => A3barB3 + A2barB2x3 +...
Okay, This time it's an exam question. I am doing some past papers and there are questions about comparators which are not introduced in this course (this course is preliminary course for engineering students who are interested in electrical, electronic or computer...
IN = 2.6 x 10-3 A and RN = Rth
I had thought about using superposition...
But when I attempted to do this question, I hadn't clearly understood these theorems.
My lecturer just taught too fast... I couldn't really get myself familiar with these theorems just from what he taught in class. So I...
Hi. It's me again. Right now I have some troubles with Thevenin's and Norton's theorem.
Here is the circuit.
I have to find the thevenin voltage Vth and thevenin resistance Rth and solve the circuit when there is a 2000Ω resistor connected to A and B.
Then, I try to solve it...
First, for the...
Here is the circuit. I have to find the voltage across each resistor and the current i1 and i2.
My attempts are the following:
i2 + i1 = 0.1 A
3 - 5 - 100i1 + 1100i2 = 0
∴ i1 = 0.09 A, i2 = 0.01A
∴ Voltage across 100Ω resistor = 0.09 × 100 = 9 V, voltage across 1100Ω resistor...
I think I was taught the superposition theorem...
I just simply get confused at the line joining node D and E...
As no current flow through these two nodes (or just 1 node as their potentials are the same), so current from C to D means from C to E?
Hi. I have moved on to the next question. There is something I am confused.
The question wants us to express Rf in terms of R such that vo = -15vi.
After doing the last task, I think I understand the flow of solving it. But here still exists a problem.
My attempts and question are listed in...
In the following circuit, compute the values of R1 and R3 in terms of R2 and R4, such that vo is always equal to v1 - 5v2.
I have marked 3 nodes, A, B and C. v+ = v- as assumption for the op-amp.
Consider node A.
v- = v+ = v1 × (R2 / (R1+R2))
Consider node B and C.
(v- - v2) / R3 = (vo -...