ابزاردقیق

ارائه یازدهم

Active Filters

• A filter is an electronic circuit that allows only selected frequency region to pass through.

• Simplest filters can be constructed from passive components alone. When impedance matching becomes a problem, or amplification is needed, a circuit designer would switch to an active filter counterpart.

• Note that now the gains are complex numbers that vary with frequency. Therefore, frequency-dependent gain of a filter can be constructed by selecting ZS and ZF. Their values can be dictated by basic passive components; i.e., resistors, capacitors, and inductors.

Active Low-Pass Filter

Active High-Pass Filter

Active Band-Pass Filter