Analogue signals take...
Digital signals take...
Restricted rages of amplitude
Binary signals are ____ signals that take only _ ____
Binary signlas are digital signlas that take only 2 ranges
What does an anolog and digital signal graph look like?
- Anologue circuits are more vulnerable to noise
- Digital circuits can tolerate some levels of noise
Base 2 means?
We can only use 0 and 1
How would you write 11010.1 in binary?
How do you convet decimal to binary?
The hexadecimal number system represents...
A larger range of values with one digit
Basic Boolean operations are...
AND, OR and NOT
If the variable doesn't have the value 0, it must have...
The value 1 and vice versa
Symbols like ____ to represent Boolean ____
Symbols like A, B etc to represent Boolean variables
What do truth tables do?
Describe how a logic circuit (gate) outputs depend on it's inputs
What sign is commenly used to represent an Or gate?
The plus sign (+)
What does an Or gate look like?
What gate produces an output of 1 whenever when all of the inputs are 1?
An Or gate
What does an And gate look like?
What is the Boolean expression for an Or gate?
z = x + y
What is the Boolean expression for an And gate?
z = x . y
What sign is used to commonly represent the And gate?
The period (dot) sign .
What gate produces an output of 1 only when all of the inputs are 1
An And gate
What is the symbol for a Not gate?
What is the Boolean expression for a Not gate?
z = ¬x
What sign is commonly used to represent a Not gate?
The ¬ sign is commonly used to represent not. Sometimes a bar over the variable is used also
A Not gate is a...?
Circuite that inversts - or negates - the input signal
What gate produces an output of 1 whenever the input is 0, and an ouput of 0 when the input is 1
A Not gate
What is the symbol for a Nand gate?
What is the Boolean expression for a Nand gate?
z = ¬ ( x . y )
Sometimes you will see this written in the notation that has a bar over the top
What gate produces an output of 1 only when any one of the inputs are 0?
A Nand gate
A Nand gate is...
the logical not of the output of an And gate