A6 LT6 Flashcards
How is the emitter identified in a transistor symbol?
Arrow from P-type to N-type
What are the advantages of a transistor compared to a relay circuit?
Solid-state, no moving parts.
What occurs when a small emitter-to-base current is established in a transistor?
A much larger emitter-to-collector current can occur.
What is the difference between the emitter and collector regions of a BJT?
N-type
To operate an NPN transistor, what is the requirement for the emitter?
It must be negative
What happens when a transistor is saturated?
It is fully open
What does a transistor do
1, turns on a off
Amplifys
What happens if the P-type layer is removed?
Load current flows through N-type regions
How is the base-emitter junction biased in all transistor circuits?
Forward-biased
What happens when the base current is increased in a transistor circuit?
Decreases internal collector-to-emitter resistance
To operate an NPN transistor, what is the requirement for the base?
It must be positive
How is an NPN transistor constructed?
N-type/P-type/N-type
What does the base layer of P-type semiconductor do?
Blocks conduction through load circuit
How is the collector biased in all transistor circuits?
Reverse-biased
To operate an NPN transistor, what is the requirement for the collector?
It must be positive