A filter with a band-reject characteristic is frequently referred
to as a notch filter. A typical circuit using a µ 741 is the unity-gain
configuration for this type of active filter shown. The filter response
curve shown is a second-order band-reject filter with a notch frequency
of 3 kHz. The resulting Q of this filter is about 23, with a notch
depth of - 31 dB.Although three passive networks are used in this application, the
operational amplifier has become a sharply tuned low-frequency filter
without the use of inductors or large-value capacitors.
Active band-reject filter Circuit Diagram
.jpg)
0 comments:
Post a Comment