It's logical Flashcards
1
Q
In a transistor.
A
A small base current can switch on a greater current through the collector.
2
Q
Transistor Eq.
A
Ie = Ib + Ic
3
Q
Making an AND gate.
A
- Two transistors can be combined to make an AND gate
- A small input current at A will switch on the upper transistor.
- A small input current at B will switch on the lower transistor.
- A current at A and at B are needed to switch on the 6V supply.
4
Q
What do transistor circuits have?
A
Transistor circuits always have a high value resisistor in the base circuit to limit the current.
5
Q
OR gate behaviour
A
An OR gate behaves like two switches in parallel. The output is high if input X or input Y is high.
6
Q
NAND gate behaviour
A
A NAND behaves as if it is an AND gate followed by a NOT gate.
7
Q
NOR gate behaviour
A
A NOR behaves as if it is an OR gate followed by a NOT gate.
