Question 1

In practical application, there is generally enough imbalance in an amplifier or enough electrical noise&#160; to send the op amp into ____.&#10;A) bias&#10;B) saturation&#10;C) overload&#10;D) inversion

Accepted Answer

In practical applications, imbalances in an amplifier or electrical noise can push the operational amplifier (op amp) into saturation, where it outputs its maximum or minimum voltage.

Question 2

The operational amplifier circuit depends on a slight imbalance in the op amp or random circuit noise&#160; to start the oscillator.

Accepted Answer

Oscillators based on operational amplifiers (op-amps) often rely on slight imbalances or random circuit noise to initiate oscillation, as they require a non-zero input to start the feedback process that leads to sustained oscillation.

Question 3

If the oscilloscope is connected to a pulse generator, the positive pulse is much longer than the&#160; negative pulse.

Accepted Answer

The duration of the positive and negative pulses displayed on an oscilloscope when connected to a pulse generator depends on the settings of the pulse generator itself, not an inherent characteristic of the oscilloscope. Pulse generators can typically be adjusted to produce pulses of various durations, so the relative lengths of positive and negative pulses can vary widely based on these settings.

Question 4

A(n) ____ produces a waveform, which has positive and negative pulses of equal voltage and time.&#10;A) oscillator&#10;B) inverter&#10;C) rectifier&#10;D) bridge

Accepted Answer

An oscillator is designed to produce waveforms, including those with positive and negative pulses of equal voltage and time, typically used in various electronic devices for generating signals.

Question 5

A millivolt difference between the two inputs is enough to drive the amplifier's output from one state&#160; to the other and it can be corrected with the addition of a ____.&#10;A) distress loop&#10;B) bridge loop&#10;C) hampered loop&#10;D) hysteresis loop

Accepted Answer

The correct term is "hysteresis loop." Adding a hysteresis loop to an amplifier circuit helps prevent rapid switching between states due to small voltage fluctuations at the input, stabilizing the output.

Question 6

The addition of the hysteresis loop changes the differential between two inputs of ____.&#10;A) kilovolts&#10;B) millivolts&#10;C) decivolts&#10;D) volts

Accepted Answer

The addition of the hysteresis loop changes the differential between two inputs of volts.

Question 7

The 741 operational amplifier can easily be changed from a square-wave oscillator to a pulse&#160; generator.

Accepted Answer

By adjusting the feedback and component values in the circuit, a 741 operational amplifier can be reconfigured to change its output from a square wave to a pulse waveform, demonstrating its versatility in signal generation.

Question 8

A voltage difference of only a few hundred millivolts is all that is needed to make the output of the&#160; amplifier go high or low.

Accepted Answer

The answer of A voltage difference of only a few...

Question 9

An operational amplifier can be used as an oscillator.

Accepted Answer

An operational amplifier (op-amp) can be configured with external components such as resistors and capacitors to form an oscillator circuit, which generates a continuous periodic waveform.

Question 10

If the inverting input becomes slightly more positive than the noninverting input, the output goes ____.&#10;A) out of bounds&#10;B) minimal&#10;C) low&#10;D) high

Accepted Answer

In an operational amplifier, if the inverting input becomes slightly more positive than the noninverting input, the output will swing to its negative extreme, which is generally referred to as going low.

Deck 40: The 741 Operational Amplifier Used As an Oscillator