E7G01

What determines the gain and frequency characteristics of an op-amp RC active filter?

  1. The values of capacitors and resistors external to the op-amp

E7G02

What causes ringing in a filter?

  1. The frequency and phase response of the filter

E7G03

What are the advantages of using an op-amp instead of LC elements in an audio filter?

  1. Op-amps exhibit gain rather than insertion loss

E7G04

Which of the following capacitor types is best suited for use in high-stability op-amp RC active filter circuits?

  1. Polystyrene

E7G05

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

  1. Restrict both gain and Q

E7G06

What steps are typically followed when selecting the external components for an op-amp RC active filter?

  1. Standard capacitor values are chosen first, the resistances are calculated, and resistors of the nearest standard value are used

E7G07

Which of the following is the most appropriate use of an op-amp RC active filter?

  1. As an audio receiving filter

E7G08

Which of the following is a type of active op-amp filter circuit?

  1. Sallen-Key

E7G09

What voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

  1. 47

E7G10

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

  1. It does not vary with frequency

E7G11

What will be the output voltage of the circuit shown in Figure E7-4 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts is applied to the input?

  1. –2.3 volts

E7G12

What voltage gain can be expected from the circuit in Figure E7-4 when R1 is 1800 ohms and RF is 68 kilohms?

  1. 38

E7G13

What voltage gain can be expected from the circuit in Figure E7-4 when R1 is 3300 ohms and RF is 47 kilohms?

  1. 14

E7G14

What is an operational amplifier?

  1. A high-gain, direct-coupled differential amplifier whose characteristics are determined by components external to the amplifier

E7G15

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

  1. The potential between the amplifier input terminals of the op-amp in a closed-loop condition

E7G16

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

  1. Very high

E7G17

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

  1. Very low

 

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