E7G01:

What is the typical output impedance of an op-amp?

1. Very low
2. Very high
3. 100 ohms
4. 1000 ohms

E7G02:

What is ringing in a filter?

1. An echo caused by a long time delay
2. A reduction in high frequency response
3. Partial cancellation of the signal over a range of frequencies
4. Undesired oscillations added to the desired signal

E7G03:

What is the typical input impedance of an op-amp?

1. 100 ohms
2. 1000 ohms
3. Very low
4. Very high

E7G04:

What is meant by the "op-amp input offset voltage"?

1. The output voltage of the op-amp minus its input voltage
2. The difference between the output voltage of the op-amp and the input voltage required in the immediately following stage
3. The differential input voltage needed to bring the open loop output voltage to zero
4. The potential between the amplifier input terminals of the op-amp in an open loop condition

E7G05:

How can unwanted ringing and audio instability be prevented in an op-amp RC audio filter circuit?

1. Restrict both gain and Q
2. Restrict gain but increase Q
3. Restrict Q but increase gain
4. Increase both gain and Q

E7G06:

What is the gain-bandwidth of an operational amplifier?

1. The maximum frequency for a filter circuit using that type of amplifier
2. The frequency at which the open-loop gain of the amplifier equals one
3. The gain of the amplifier at a filter's cutoff frequency
4. The frequency at which the amplifier's offset voltage is zero

E7G07:

What magnitude of voltage gain can be expected from the circuit in Figure E7-3 when R1 is 10 ohms and RF is 470 ohms?

1. 0.21
2. 94
3. 47
4. 24

E7G08:

How does the gain of an ideal operational amplifier vary with frequency?

1. It increases linearly with increasing frequency
2. It decreases linearly with increasing frequency
3. It decreases logarithmically with increasing frequency
4. It does not vary with frequency

E7G09:

What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?

1. 0.23 volts
2. 2.3 volts
3. -0.23 volts
4. -2.3 volts

E7G10:

What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 1800 ohms and RF is 68 kilohms?

1. 1
2. 0.03
3. 38
4. 76

E7G11:

What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 3300 ohms and RF is 47 kilohms?

1. 28
2. 14
3. 7
4. 0.07

E7G12:

What is an operational amplifier?

1. A high-gain, direct-coupled differential amplifier with very high input impedance and very low output impedance
2. A digital audio amplifier whose characteristics are determined by components external to the amplifier
3. An amplifier used to increase the average output of frequency modulated amateur signals to the legal limit
4. A RF amplifier used in the UHF and microwave regions