ابزاردقیق ارائه یازدهم. Active Filters A filter is an electronic circuit that allows only selected frequency region to pass through. Simplest filters.

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Presentation transcript:

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