Transistors and Logic Gates
Ie = Ib + Ic
The equation for working out the current in the emitter terminal of a transistor
base, emitter, collector
The names of the three terminals on a transistor
3
The number of terminals that a transistor has
2
The number of transistors in the circuit diagram for an AND gate
The emitter
The terminal on an NPN transistor that has an arrow drawn on it
The Amp (A)
The unit of current
The Ohm
The unit of resistance
The Volt (V)
The unit of voltage
Increased miniaturisation of electronic components
The use of transistors has helped us to achieve this
1948
The year that the first modern transistor was invented
235mA
A base current of 15mA switches a collector current of 220mA. What is the emitter current?
101mA
A base current of 1mA switches a collector current of 100mA. What is the emitter current?
115mA
A base current of 5mA switches a collector current of 110mA. What is the emitter current?
Transistor
An electronic component that has three terminals. They can act as amplifiers or switches.
NPN
Negative - Positive - Negative. The type of transistor with n-type semiconductor as the two bits of 'bread' in the sandwich, and p-type semiconductor as the 'cheese'.
switches and amplifiers
Transistors can act as these two types of component
logic gates
Transistors can be combined to make these