Exam 19: Active Filters Key

Which filter provides flatness of the passband response,but has a relatively slow roll-off rate?

Attenuation is almost always expressed in ________.

Which filter will always produce the least roll-off of all the approximations?

Filters that are useful below 1 MHz,have power gain,and are relatively easy to tune are ________.

Which filter has the fastest possible roll-off in the transition region,but has a rippled passband and a rippled stopband?

Filters built with resistors,capacitors,and inductors are referred to as ________.

A special frequency used in the design of active filters is the

Circuits that separate desired signals from undesired signals,block interfering signals,and enhance speech and video are called ________.

Which filter has high sensitivity but low complexity of design and operation?

Cascading first and second order filters will not result in higher-order filters.

Which order filter is most common because it is easy to build and analyze?

With a constant input voltage,attenuation is the output voltage at any frequency divided by the output voltage in the midband.

Monotonic means that the stopband has no ripples.

A filter passes one band of frequencies while rejecting another.

Passive filters are built with resistors,capacitors,and op amps.

Ac power line hum can be removed by using a properly designed Sallen-Key second-order notch filter.

Why are some filters designed with a linear phase shift for the fundamental and all significant harmonics?

An LC filter has an order of two because it contains two reactive components,an inductor and a capacitor.

Which filter produces the least distortion of digital signals?

A filter that shifts the phase of the output signal without changing the magnitude is the