Frequency Response

What is the defined term for the variation of an output signal level when the frequency signal changes?

• a) Gain-bandwidth product
• b) Bandwidth
• c) Unity-gain frequency
• d) Frequency response

Why does the gain of amplifiers vary with changing frequency?

• a) Due to transistor capacitance effects
• b) Due to Cutoff frequencies
• c) Due to coupling and bypass capacitor effects
• d) Due to Bode plot

In which frequency range does an AC amplifier exhibit a decrease in gain when the input frequency is too low or too high?

• a) Low-frequency range
• b) Midband range
• c) High-frequency range
• d) Bandwidth range

Which capacitance effects contribute to the decrease in gain at high frequencies?

• a) Cπ and Cµ
• b) CC and CE
• c) Stray capacitance
• d) Bypass capacitance

What is the term for the frequency range where coupling and bypass capacitors act as short circuits, and stray and transistor capacitances act as open circuits?

• a) Low-frequency range
• b) Midband range
• c) High-frequency range
• d) Bandwidth range

What is the gain at the lower cutoff frequency (fL) and the upper cutoff frequency (fH) compared to the maximum mid-band gain?

• a) 0 dB
• b) 3 dB less
• c) 6 dB less
• d) 9 dB less

How is the bandwidth (BW) of an amplifier defined?

• a) fH + fL
• b) fH - fL
• c) fH / fL
• d) ( fH - fL )/2

For an audio amplifier, what frequency range needs to be amplified equally to reproduce sound accurately?

• a) 20 Hz - 20 kHz
• b) 10 Hz - 100 Hz
• c) 1 kHz - 10 kHz
• d) 1 Hz - 1 kHz

What is the term for the frequency at which the amplifier's gain is 1?

• a) Gain-bandwidth product
• b) Bandwidth
• c) Unity-gain frequency
• d) Cutoff frequency

Which capacitance effects contribute to the decrease in gain at low frequencies?

• a) Stray capacitance
• b) Transistor capacitance effects
• c) CC and CE
• d) Cpi and Cmu