It's Logical

Question 1

What is the equation of current in a transistor?

Answer 1

Small base current can switch on larger current through the collector.
Ie = Ib + Ic

Question 2

How can we make an AND gate?

Answer 2

• Two transistors combined
• Small base current at A will switch on transistor
• Small base current at B will switch on second transistor
• A and B are needed for the current to flow

Question 3

How do transistor currents limit the current?

Answer 3

They have a high resistor in the base circuit.

Question 4

What is an OR gate?

Answer 4

Behaves like two switches in parallel, only needs one of them to allow current to flow.

Question 5

What are NAND and NOR gates?

Answer 5

Behave the opposite to what they would be.
NAND - AND followed by NOT
NOR - OR followed by NOT