# BJT and FET Frequency Response – Exercise – 1

Exercise – 1

1. The smaller capacitive elements of the design will determine the ________ cutoff frequencies. (a) low (b) mid (c) (d)

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2. What is the ratio of the capacitive reactance XCS to the input resistance RI of the input RC circuit of a single-stage BJT amplifier at the low-frequency cutoff? (a) 0.25 (b) 0.50 (c) 0.75 (d) 1.0

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3. A change in frequency by a factor of ________ is equivalent to 1 octave. (a) 2 (b) 10 (c) 5 (d) 20

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4. What is the normalized gain expressed in dB for the cutoff frequencies? (a) –3 dB (b) +3 dB (c) –6 dB (d) –20 dB

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5. For which of the following frequency region(s) can the coupling and bypass capacitors no longer be replaced by the short-circuit approximation? (a) Low-frequency (b) Mid-frequency (c) High-frequency (d) All of the above