5.5 Logic Circuits Flashcards
What does binary 0 typically represent?
0 Volts
What does Binary 1 typically Represent?
+5 Volts
What does Binary 0 actually represent?
0 to 0.8V
What does Binary 1 actually represent?
2 and 5 Volts
Boolean 0 and 1 do not represent actual numbers but the state of a voltage variable, which is called?
Logic Level
In Boolean algebra what are the 3 basic operations?
AND, OR, NOT
Logic circuits are formed by?
Combining many logic gates.
What gate is this?
OR
Which gate does this table belong to?
OR
Which gate does this circuit belong to?
OR
Which gate is this?
AND
Which gate does this table belong to?
AND
Which gate does this circuit belong to?
AND
What does the small circle on a gate denote?
Inversion
Which gate is this?
NOT
Which gate does this table belong to?
NOT
How are 3 input AND gates constructed?
By adding 2 AND gates together.
If at the end of any logic gate circuit it ends with an OR gate and has a single input of 1 what will the output be?
Always 1.
Which gate is this?
NAND
Which gate is this?
NOR
Which gate does this circuit belong to?
NOR, Note switches below output
What are the Universal gates?
NOR and the NAND
Describe the Buffer.
Single input device which has a gain of 1 , mirroring the input at the output.
Describe the inverting buffer
Single input device producing the state opposite of the input
What do these 2 IEEE symbols represent?
Buffer (Top) and Inverting Buffer
What is the purpose of a Flip Flop?
It stores a Single Bit of Binary data, it will maintain a state of 1 or 0 until directed to change its state.
What are the common applications of Flip Flops?
Counters, Registers, Frequency Divider Circuits and Data Transfer.
A circuit that has 2 stable states is called a?
Flip flop or Latch Circuit.
What is required to latch an SR Flip Flop Circuit?
A Pulsed input.
Describe what happens in an Invalid State.
When the inputs cause the outputs to be either all high or all low.
When is a NAND SR in the invalid state?
Both inputs LOW
When is a NOR SR in an invalid state?
Both inputs HI
What can be used to prevent the presence of switch bounce?
NAND latch.
