Lecture 7 Flashcards

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1
Q

It is the superposition of sinewaves with different amplitudes and frequencies

A

Sound

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2
Q

The region of frequency where the amplification and delay is reasonably constant i.e. gain is nearly equal to one.

A

Mid-band frequency

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3
Q

The region where the active circuit may behave as a simple high pass circuit. The response decrease with decreasing frequency and output approaches to zero.

A

Below mid-band frequency

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4
Q

The circuit behaves like a low-pass circuit and the response decreases with increase in frequency.

A

Above mid-band frequency

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5
Q

This means that when the frequency is at the lower cutoff frequency, the gain at that point is _____ times the gain at mid-band frequencies

A

0.707

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6
Q

it is a filter that passes only frequencies lower than the cutoff frequency

A

Low-pass filter

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6
Q

The equations show that for any inverting amplifier (negative Av,
with phase reversal), the Miller Effect capacitance is ______ sign.

A

positive

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6
Q

If the voltage gain is positive (no phase reversal), Miller Effect
capacitance is _____.

A

negative

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7
Q

It is the largest of the parasitic capacitances with Cce the smallest.

A

Cbe

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8
Q

The ______ and ______ of an amplifier affect the low-frequency response.

A

coupling and bypass capacitors

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9
Q

The ___________ capacitances affect the high-frequency response.

A

internal transistor

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10
Q

It is a logarithmic unit of measurement for power gain and voltage gain.

A

Decibel

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11
Q

A decrease in voltage gain to 70.7% of midrange value is a reduction of _____.

A

3 dB

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12
Q

A halving of the voltage gain corresponds to a reduction of ____.

A

6 dB

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13
Q

It is a unit for measuring power levels referenced to 1 mW.

A

dBm

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14
Q

Each RC circuit causes the gain to drop at a rate of _______.

A

20 dB/decade

15
Q

A decade of frequency change is a ________ change (increase or decrease).

A

ten-times

16
Q

An octave of frequency change is a ________ change (increase or decrease).

A

two-times

17
Q

It is the range of frequencies between the dominant lower critical frequency and the dominant upper critical frequency.

A

Bandwidth of an amplifier

18
Q

It is a transistor parameter that is constant and equal to the unity gain frequency.

A

Gain-bandwidth product

19
Q

Two frequency response measurement methods are _________ and ______

A

frequency/amplitude and step