In electronics, a subtractor can be designed using the same approach as that of an adder. The binary subtraction process is summarized below. As with an adder, in the general case of calculations on multi-bit numbers, three bits are involved in performing the subtraction for each bit of the difference: the minuend (
X
i
{\displaystyle X_{i}}
), subtrahend (
Y
i
{\displaystyle Y_{i}}
), and a borrow in from the previous (less significant) bit order position (
B
i
{\displaystyle B_{i}}
). The outputs are the difference bit (
D
i
{\displaystyle D_{i}}
) and borrow bit
B
i
+
1
{\displaystyle B_{i+1}}
. The subtractor is best understood by considering that the subtrahend and both borrow bits have negative weights, whereas the X and D bits are positive. The operation performed by the subtractor is to rewrite
X
i
−
Y
i
−
B
i
{\displaystyle X_{i}-Y_{i}-B_{i}}
(which can take the values -2, -1, 0, or 1) as the sum
{\displaystyle B_{i+1}=X_{i}<(Y_{i}+B_{i})}
Subtractors are usually implemented within a binary adder for only a small cost when using the standard two's complement notation, by providing an addition/subtraction selector to the carry-in and to invert the second operand.
−
B
=
B
¯
+
1
{\displaystyle -B={\bar {B}}+1}
(definition of two's complement notation)
So I have a few problems that I need help with. Any help would be greatly appreciated as I am new here and stumped.
1. A woman walks 220 m in the direction 27 degrees east of north, then 205 m directly east.
(a) find the magnitude (finished it).
362.5 m
(b) Find the angle of her final...
If A= 60.0 and theda = 56.5 degrees
of this graph
http://www.flickr.com/photos/44447874@N08/4079278252/
can you help me find C - A - B?
magnitude and direction (counterclockwise from the +x axis is positive)
Also how do I find 2A - 3B + 2C?
Thank you
I am completely lost. Here is a similar equation, I changed the lengths and angles.
Vector A is 3.0 meters long, and is 45 degrees from the x axis.
Vector B is 6.0 meters long, and is 130 degrees from the x axis.
What are the x and y components of the vector C=B-A?
What is the magnitude...
This is the problem that I was given:
Given two vectors A and B, with magnitudes |A| = 45.7 and |B|=38.2 and directions (from the x-axis) θA=64° and θB=145°, find the magnitude of (A-B)
I know that this somehow involves triangles and trigonometry, but I am really confused as to how I do...
Homework Statement
Three vectors a , b , and c each have a magnitude of 42 m and lie in an xy plane. Their directions relative to the positive direction of the x-axis are 29°, 197°, and 314°, respectively. What are (a) the magnitude and (b) the angle of the vector a+ b + c, and (c) the...
grad(A*B)=(A*grad)B + (B*grad)A + A curl B + B curl A
i'm not sure how to read the RHS to begin to work out the index definition.i'm thinking if add and subtract terms this will work out. i think i can see the first two terms, but the last two maybe "A cross nabla" is what they mean acting on...
"Subtracting out" a random variable
let X be a discrete R.V. and let Y = f(X) for some function f. I wish to find a function g, such that Y and Z = g(X) are independent, and also such that the uncertainty H(Z) is maximized. For example, suppose X is uniformly distributed over...
Homework Statement
Hey, sorry about this. Its really obvious, i think there's just some really simple way to do it. Its annoying me, my teacher couldn't do it either!
Evaluate 6667²-3333² (without a calculator)
Homework Equations
The Attempt at a Solution
I know there is just...
[SOLVED] Linear transformation - adding and subtracting?
Homework Statement
Suppose T : P2 -> P2 is a linear transformation satisfying T(3 − x + 4x^2) = 1 + x − x^2 and
T(2 − 3x + 2x^2) = 7 + 3x + 2x^2.
Find T(7x + 2x^2).
The Attempt at a Solution
First of all, it's linear. To find...
http://img523.imageshack.us/img523/4889/yf0148vj7.jpg
Homework Statement
Use unit vectors to express the vector C, where C = 3.00A - 4.00B
Keep in mind that C, A, and B are vectors, I could not get the Latex to work.
Homework Equations
There are no relevant equations, but I don't...
correct me if I am wrong..
as i see it, i can subtract any constant from the diagonal of the hamiltonian without really changing the system it describes... am i right?
if i got a two state system, the hamiltonian can look like this:
\left(
\begin{array}{cc}
0 & P_{2->1} \\
P_{1->2} & \Delta...
How do you do this problem (without a calculator) that looks deceivingly simple, yet is utterly confusing. (2 ^ 30 - 2 ^ 29)/2 = ?. The answer is
2 ^ 28, but how was this done without using a calculator. The furthest I can take this without using a calculator is 2 ^ 29 - 2 ^ 28
Adding & Subtracting Vectors And Relative Velocity
Hey everyone, I am so confused with this it's not funny. This is my first time accessing a site like thisss, but I am desperate seeing as though it's school holidays atm where I am and I can't talk to my physics teacher for help. Anyhow, I hope...
Can anyone think of a circuit that takes two input voltages and produce an output voltage equal to the difference in input voltages? In other words, a "voltage subtractor?"
And don't answer "op-amp!" I don't want to use an op-amp. The circuit also must function with only one positive...