ATT Test
ATT Test 5 Actual Exam Complete Questions with Correct
Answers (Verified Answers) Already Graded A+2025
What is the purpose of diode limiters? -Correct Answer ✔to limit the amplitude of input
signal
When does limiting occur in a series limiter? -Correct Answer ✔When the diode is
reverse biased
What type of signal reverse biases a series negative limiter? -Correct Answer
✔Negative signals
When does limiting occur in parallel limiters? -Correct Answer ✔When diode is forward
biased
What happens when circuit bias is added to limiter circuits? -Correct Answer ✔partial
alterations are eliminated by raising/lowering limits from 0V
What is the purpose of diode clampers? -Correct Answer ✔To clamp AC signal AT a DC
output level
What three components make up clamper circuit? -Correct Answer ✔capacitor, resistor,
diode
When is the capacitor able to quickly charge in clamper circuit? -Correct Answer
✔When the diode is forward biased (low resistance)
What is the purpose of transistors? -Correct Answer ✔to control currents (signals)
The emitter to base is always (forward/reverse) biased? -Correct Answer ✔Forward (low
ohms)
The collector to base is always (forward/reverse) biased? -Correct Answer ✔Reverse
(high ohms)
Which part of a transistor is heavily doped? -Correct Answer ✔Emitter
Which part of a transistor is lightly doped and thin? Does it allow current carriers to
pass? -Correct Answer ✔Base. Allows most current carriers to pass
Which part of the transistor is moderately doped? -Correct Answer ✔Collector
Which part of the transistor is the largest to dissipate the most heat? -Correct Answer
✔Collector
1|Page
, ATT Test
What allows the transistor to operate? -Correct Answer ✔DC voltages (bias)
Collector current is (less than/greater than) base current -Correct Answer ✔greater than
What voltage is needed to forward bias the base to emitter? -Correct Answer ✔0.6 V
The arrow of a transistor always points to what? -Correct Answer ✔Negative terminal
(N-type material)
What is saturation bias? -Correct Answer ✔The point where increasing base voltage no
longer increases collector current
When saturated the transistor acts like a what? -Correct Answer ✔Short
What is cutoff bias? -Correct Answer ✔The point where base bias reverse biases the
emitter base junction stopping base current and collector current
Alpha should never exceed what value? -Correct Answer ✔1
Beta should be around what values? -Correct Answer ✔20-400
Three types of bias circuits? -Correct Answer ✔Fixed, self, combination
What is the disadvantage of fixed biasing? -Correct Answer ✔Temperature sensative
What are an advantage and disadvantage of self biasing? -Correct Answer ✔Fixes
temperature issues but lowers beta
Which type of biasing includes a voltage divider? -Correct Answer ✔Combination
How many classes of amps are there? -Correct Answer ✔4
Collector current in class A amps flows for how much of input signal? -Correct Answer
✔100%
Which class of amp has the best fidelity and low distortion? -Correct Answer ✔Class A
What is DC bias for a class B amp? -Correct Answer ✔At cutoff (0.6V)
Collector current flows for how much of input signal (Class B amp)? -Correct Answer
✔50%
2|Page
ATT Test 5 Actual Exam Complete Questions with Correct
Answers (Verified Answers) Already Graded A+2025
What is the purpose of diode limiters? -Correct Answer ✔to limit the amplitude of input
signal
When does limiting occur in a series limiter? -Correct Answer ✔When the diode is
reverse biased
What type of signal reverse biases a series negative limiter? -Correct Answer
✔Negative signals
When does limiting occur in parallel limiters? -Correct Answer ✔When diode is forward
biased
What happens when circuit bias is added to limiter circuits? -Correct Answer ✔partial
alterations are eliminated by raising/lowering limits from 0V
What is the purpose of diode clampers? -Correct Answer ✔To clamp AC signal AT a DC
output level
What three components make up clamper circuit? -Correct Answer ✔capacitor, resistor,
diode
When is the capacitor able to quickly charge in clamper circuit? -Correct Answer
✔When the diode is forward biased (low resistance)
What is the purpose of transistors? -Correct Answer ✔to control currents (signals)
The emitter to base is always (forward/reverse) biased? -Correct Answer ✔Forward (low
ohms)
The collector to base is always (forward/reverse) biased? -Correct Answer ✔Reverse
(high ohms)
Which part of a transistor is heavily doped? -Correct Answer ✔Emitter
Which part of a transistor is lightly doped and thin? Does it allow current carriers to
pass? -Correct Answer ✔Base. Allows most current carriers to pass
Which part of the transistor is moderately doped? -Correct Answer ✔Collector
Which part of the transistor is the largest to dissipate the most heat? -Correct Answer
✔Collector
1|Page
, ATT Test
What allows the transistor to operate? -Correct Answer ✔DC voltages (bias)
Collector current is (less than/greater than) base current -Correct Answer ✔greater than
What voltage is needed to forward bias the base to emitter? -Correct Answer ✔0.6 V
The arrow of a transistor always points to what? -Correct Answer ✔Negative terminal
(N-type material)
What is saturation bias? -Correct Answer ✔The point where increasing base voltage no
longer increases collector current
When saturated the transistor acts like a what? -Correct Answer ✔Short
What is cutoff bias? -Correct Answer ✔The point where base bias reverse biases the
emitter base junction stopping base current and collector current
Alpha should never exceed what value? -Correct Answer ✔1
Beta should be around what values? -Correct Answer ✔20-400
Three types of bias circuits? -Correct Answer ✔Fixed, self, combination
What is the disadvantage of fixed biasing? -Correct Answer ✔Temperature sensative
What are an advantage and disadvantage of self biasing? -Correct Answer ✔Fixes
temperature issues but lowers beta
Which type of biasing includes a voltage divider? -Correct Answer ✔Combination
How many classes of amps are there? -Correct Answer ✔4
Collector current in class A amps flows for how much of input signal? -Correct Answer
✔100%
Which class of amp has the best fidelity and low distortion? -Correct Answer ✔Class A
What is DC bias for a class B amp? -Correct Answer ✔At cutoff (0.6V)
Collector current flows for how much of input signal (Class B amp)? -Correct Answer
✔50%
2|Page
