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Active Filters: High Pass  Page 1
Active Filter -- Main Page
Active Filters:   #'s - C      D - H      I - Z
Last Updated on:
Thursday, April 07, 2016 01:01 PM

Circuits Designed by Dave Johnson, P.E. :

  • Active High Pass Filters  -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achieve any frequency cut-off you may need . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/11/02]

  • Collection Active High Pass Filters  -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achieve any frequency cut-off you may need . . . [Hobby Circuit designed by David Johnson P.E.,  02/11/02]

  • High Pass Active Filters  -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achieve any frequency cut-off you may need . . . [Circuit by Dave Johnson P.E.,  02/11/02]

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1KHz 4th order Butterworth filter using LT1367 quad operational Amplifier -  The filter is a simplified state variable architecture consisting of two cascaded 2nd-order sections.  Eaqch section uses a 360 degree phase shift around the two op-amp loop to creat a negative summing junction… [designer not identified]

 

20KHz Butterworth active filter using Linear Technology LT1124, LT1355 or LT1169 -  This file will be usful for anti-aliasing or band limiting in an audio system.   The op opm is a Linear Technology, LT1123, LT1355, or LT1169… [designer not identified]

 

4th Order Butterworth filter schematic and calculator -  This calculator will design a two-way fourth-order Butterworth crossover network for you. If you don't understand what any of the terms mean, click here for help.… [CarStereo.com c/o Online Connexions, Inc.]

Active 2nd Order Filters -  The figures below illustrate using opamps as active 2nd order filters. Three 2nd order filters are shown, low pass, high pass, and bandpass. Each of these filters will attenuate frequencies outside their passband at a rate of 12dB per octave or 1/4 the voltage Amplitude for each octave of frequency increase or decrease outside the passband… [Bill Bowden, designer]

 

Active High Pass Filters -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achieve any frequency cut-off you may need . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/11/02]

 

Akerberg-Mossberg (AM) Second Order Highpass inverting filter -  Schematic only, no text included…

 

Basic Introduction to Filters -  App Note - on active, passive and switched capacitor filters, document in PDF format…

 

Berka-Herpy (BH) Second Order Highpass non-inverting Filter -  Schematic only, no text included…

 

Butterworth BPF -  4th order BPF… [EI9GQ homebrew radio]

 

Butterworth filter has adjustable group delay -  08/08/02  EDN Design Idea   The Sallen-Key realization of a 5.25-MHz, three-pole Butterworth filter has a gain of 2V/V and can drive 75Ω back-terminated coax with an overall gain of 1 (Figure 1). Used to reconstruct component-video (Y, Pb, Pr] and RGB signals, t… [by William Stutz, Maxim Integrated Products, Sunnyvale, CA]

 

Butterworth Filters -  …

 

Chebyshev Bandpass Filter -  …

 

Chebyshev/Butterworth Filters -  This program was written in PC-BASIC for automated design of Chebyshev and Butterworth filters in the low-pass, high-pass, band-pass and band-stop configurations. These filters are composed of a series of circuit branches which are alternately connected in series or shunt with the source-to-load path. In low-pass and high-pass filters, each branch is either a capacitor or an inductor. In band-pass and band-stop filters…

 

Collection Active High Pass Filters -  This is a collection of inverting and non-inverting active high pass filter circuits.  I included one, two three, four and six pole filter circuits.  You can change the component value ratios shown to achieve any frequency cut-off you may need . . . [Hobby Circuit designed by David Johnson P.E.,  02/11/02]


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