ATT WEEK 5 QUESTIONS AND ANSWERS 2025
Limiting action happens in series when a diode is________ and in parallel when a diode is________. -
(ANSWER)Reverse biased, forward biased.
What is the purpose of a diode limiting circuit? - (ANSWER)To limit amplitude of the input.
What do clampers do? - (ANSWER)Add DC to AC signal.
A transistor in a Common Emitter transfers an internal resistance from a low resistance in emitter base
to? - (ANSWER)High resistance in collector base.
Ie (Emitter current) = ? - (ANSWER)Ib (base current) + Ic (collector current)
When does cutoff occur in a Common Emitter? - (ANSWER)When Emitter PN junction is reversed.
A Common Emitter has a gain of how much? - (ANSWER)10
How does a Common Emitter affect the phase of an input signal? - (ANSWER)It inverts the input 180°
(flip)
A Common Collector has a gain of how much? - (ANSWER)1 (no phase inversion)
A Common Base has a gain of how much? - (ANSWER)10 (no phase inversion)
How do transistor amplifiers operate? - (ANSWER)By an AC input signal changing base bias.
The component that develops bias for a transistor part is directly connected to the_________. -
(ANSWER)Corresponding transistor part.
, ATT WEEK 5 QUESTIONS AND ANSWERS 2025
In a Common Emitter, if base voltage (base bias) increases, emitter current does what? -
(ANSWER)Increases.
A small input controls a__________. - (ANSWER)Large output
What is the most common type of Multi-stage Amplifier? - (ANSWER)RC (Resistive-capacitive)
What is the purpose of Cascade amplifiers? - (ANSWER)To increase Av (Voltage Gain)
How is AvT (Total voltage gain) calculated in a Cascade Amplifier? - (ANSWER)The product of individual
stage gains (Q1xQ2xQ3x...=AvT)
What is the typical gain for a three stage cascade amplifier (assumed value)? - (ANSWER)1,000
What is Cascading? - (ANSWER)The connecting of multiple amplifiers in series.
What is step 1 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)Check output, compare
measured Av to Calculated Av.
What is step 2 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)Check individual stage
gains.
What is step 3 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)Check components of
isolated stage, start with transistor.
What is step 4 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)If the transistor is not
at fault, turn off power and take resistance measurements. Replace Faulty component.
Is a value of 1100 acceptable in a three stage Cascade Amplifier (assumed value)? - (ANSWER)Yes. There
is an assumed error margin of ±10%. 1100 falls within the assumed value of 1,000's margin.
Limiting action happens in series when a diode is________ and in parallel when a diode is________. -
(ANSWER)Reverse biased, forward biased.
What is the purpose of a diode limiting circuit? - (ANSWER)To limit amplitude of the input.
What do clampers do? - (ANSWER)Add DC to AC signal.
A transistor in a Common Emitter transfers an internal resistance from a low resistance in emitter base
to? - (ANSWER)High resistance in collector base.
Ie (Emitter current) = ? - (ANSWER)Ib (base current) + Ic (collector current)
When does cutoff occur in a Common Emitter? - (ANSWER)When Emitter PN junction is reversed.
A Common Emitter has a gain of how much? - (ANSWER)10
How does a Common Emitter affect the phase of an input signal? - (ANSWER)It inverts the input 180°
(flip)
A Common Collector has a gain of how much? - (ANSWER)1 (no phase inversion)
A Common Base has a gain of how much? - (ANSWER)10 (no phase inversion)
How do transistor amplifiers operate? - (ANSWER)By an AC input signal changing base bias.
The component that develops bias for a transistor part is directly connected to the_________. -
(ANSWER)Corresponding transistor part.
, ATT WEEK 5 QUESTIONS AND ANSWERS 2025
In a Common Emitter, if base voltage (base bias) increases, emitter current does what? -
(ANSWER)Increases.
A small input controls a__________. - (ANSWER)Large output
What is the most common type of Multi-stage Amplifier? - (ANSWER)RC (Resistive-capacitive)
What is the purpose of Cascade amplifiers? - (ANSWER)To increase Av (Voltage Gain)
How is AvT (Total voltage gain) calculated in a Cascade Amplifier? - (ANSWER)The product of individual
stage gains (Q1xQ2xQ3x...=AvT)
What is the typical gain for a three stage cascade amplifier (assumed value)? - (ANSWER)1,000
What is Cascading? - (ANSWER)The connecting of multiple amplifiers in series.
What is step 1 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)Check output, compare
measured Av to Calculated Av.
What is step 2 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)Check individual stage
gains.
What is step 3 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)Check components of
isolated stage, start with transistor.
What is step 4 of the Multi-Stage Amplifier Troubleshooting process? - (ANSWER)If the transistor is not
at fault, turn off power and take resistance measurements. Replace Faulty component.
Is a value of 1100 acceptable in a three stage Cascade Amplifier (assumed value)? - (ANSWER)Yes. There
is an assumed error margin of ±10%. 1100 falls within the assumed value of 1,000's margin.
