Chapter 13: Operational Amplifiers

These flashcards cover key concepts and principles related to operational amplifiers, including their characteristics, configurations, and limitations.

An operational amplifier is a type of __ amplifier.

differential

An ideal op-amp has __ input impedance.

infinite

In an ideal op-amp, the output voltage is __ multiplied by the difference between the inputs.

gain

The __ signals produce no output in an ideal op-amp.

common-mode

The feedback in an inverting amplifier provides __ to the input signal.

negative feedback

In a basic inverting amplifier circuit, the non-inverting input is typically __.

grounded

The gain of an inverting amplifier is determined by the ratio of __ values.

resistor

A virtual short circuit indicates that the differential input voltage is __.

zero

An ideal op-amp can drive any load without losing __.

voltage

The input impedance of a non-inverting amplifier is __.

infinite

The output impedance of an ideal op-amp is __.

zero

Negative feedback in op-amps helps to maintain __ stability.

circuit

The voltage follower configuration has a closed-loop gain of __.

1

In practical applications, op-amps require __ to operate.

DC power

Op-amps can be affected by __ imperfections during operation.

non-linear

As frequency increases, the gain of real op-amps tends to __.

drop

The __ of an op-amp limits how quickly the output can respond to changes in the input voltage.

slew rate

The input offset voltage is a tiny DC voltage at the output even when both inputs are __.

zero

DC imperfections in op-amps include input bias current and __ current.

offset

Instrumentation amplifiers are designed to improve __ rejection.

common-mode

A differentiator circuit produces output voltage proportional to the __ of the input voltage.

derivative

To address bias current effects in inverting amplifiers, designers often match __ seen by both inputs.

resistances

The gain-bandwidth product of an op-amp remains __ regardless of gain settings.

constant

In active filters, the output impedance is __ compared to passive filters.

lower

The Butterworth filter is known for providing a smooth __ response.

low-pass

For a higher-order Butterworth filter, cascading multiple __ sections is necessary.

Sallen-Key

Input signals in a non-inverting op-amp amplify without changing the __ of the input.

polarity

An input current of zero flowing into terminals is a key characteristic of __ op-amps.

ideal

Input impedance for the differential amplifier consists of __ resistors.

multiple

The output current limit of an op-amp ensures it can't supply more current than its __ allows.

maximum

The output voltage swing of op-amps is limited by their __ supply voltages.

power

An integrator circuit outputs a voltage proportional to the __ of the input signal.

integral

The gain of the non-inverting amplifier is defined as __.

1 + (R2/R1)