What are the two primary components used in a passive filter?
Resistors and Capacitors (or Inductors).
Which type of filter requires an external power supply to function?
Active filters
True or False: Passive filters can provide a power gain greater than 1.
True
False.
4 What active component is most commonly used in active filters?
An OP Amp
Which filter type is better suited for high-frequency RF applications?
Passive Filters (Op-amps have frequency limits).
What is a major disadvantage of using inductors in low-frequency passive filters?
They become bulky, heavy, and expensive.
Active filters are excellent for "Isolation." What does this mean?
High input impedance and low output impedance prevents loading.
Why are active filters generally NOT used for high-power applications?
Op-amps are limited by their output current and voltage rails.
Which filter type is easier to tune (change the frequency) without affecting the load?
Active filter
Passive filter
What do we call a filter that allows a specific range of frequencies to pass through?
A band-pass filter
Does an active filter produce more or less thermal noise than a passive filter?
More (due to the active electronic components).
A Notch Filter is another name for which type of filter?
A band-stop
What happens to the gain of an active filter if the input frequency exceeds the Op-Amp's bandwidth?
The gain drops off (due to the Gain-Bandwidth Product).
