ELECS 15

An ideal operational amplifier has

• infinite output impedance

• zero input impedance

• infinite bandwidth

• All of the above

Another name for a unity gain amplifier is:

• difference amplifier

• comparator

• single ended

• voltage follower

What is the output waveform?

• sine wave

• square wave

• sawtooth wave

• triangle wave

The open-loop voltage gain (A_ol) of an op-amp is the

• external voltage gain the device is capable of

• internal voltage gain the device is capable of

• most controlled parameter

• same as A_cl

A series dissipative regulator is an example of a:

• linear regulator

• switching regulator

• shunt regulator

• dc-to-dc converter

What is this circuit?

• a low-pass filter

• a high-pass filter

• a bandpass filter

• a band-stop filter

A noninverting closed-loop op-amp circuit generally has a gain factor:

• less than one

• greater than one

• of zero

• equal to one

In order for an output to swing above and below a zero reference, the op-amp circuit requires:

• a resistive feedback network

• zero offset

• a wide bandwidth

• a negative and positive supply

Op-amps used as high- and low-pass filter circuits employ which configuration?

• noninverting

• comparator

• open-loop

• inverting

Decreasing the gain in the given circuit could be achieved by

• reducing the amplitude of the input voltage

• increasing the value of the feedback resistor

• increasing the value of the input resistor

• removing the feedback resistor