Closing the loop deepens notches


Posted on Oct 31, 2012

Notch filters remove a single unwanted frequency from an input signal. They are also a vital component of pulse-shaping networks, such as time-averaging filters. You can tune a state-variable filter over a wide range by changing the time constants of its integrating amplifiers (References 1, 2, and 3). Textbooks focus on its high-pass, bandpass, and lowpass outputs, but they sometimes fail to note that subtracting the bandpass output from the input signal creates a notch filter.


Closing the loop deepens notches
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Remote Thermometer circuit
AM/cw 10-meter band transmitter
FET Voltage Regulator
The grain based on PIC18F4580 weighs system design
Wire Tracer (Transmitter)
Battery operated mini night lamp
Electronic Door Release
Hybrid Headphone Amplifier
Model Theatre Lighting Dimmer
15 V FOR VTVM
Microcontroller Verification Password system
Circuit of power audio amplifier with circuit integrated tda2030 car amplifier 14 watts rms
Low-noise pre-equalizer circuit



Top