Active High Pass Filters

Active Filters: High Pass
Active Filter -- Main Page
Last Updated on: Monday, October 03, 2011 06:07 PM

Circuits Designed by Dave Johnson, P.E. :

HIGH PASS ACTIVE FILTER COLLECTION
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. The circuit does not specify an operational amplifier. The circuits should be used to select the needed resistor and capacitor components for a particular frequency knee and slope.

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

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....(electronic circuit added 7/03)

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

Basic Introduction to Filters - Application Notes on active, passive and switched capacitor filters, document in PDF format (app note added 4/02)

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

Butterworth filter has adjustable group delay - 8-Aug-02 Issue of EDN 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.... [Design Idea by William Stutz, Maxim Integrated Products, Sunnyvale, CA]

Butterworth Filters - (electronic circuit added 7/03)

Chebyshe Volt Bandpass Filter - (electronic circuit added 7/03)

Chebyshe Volt/Butterworth Filters - (electronic circuit added 7/03)

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

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

Filter First Order Highpass I non-inverting - Schematic only, no text included

Filter First Order Highpass II non-inverting - Schematic only, no text included

Filter Fliege Second Order Highpass non-inverting - Schematic only, no text included

Filter KHN (Inverting Input) Second Order Highpass inverting - Schematic only, no text included

Filter KHN (Non-Inverting Input) Second Order Highpass non-inverting - Schematic only, no text included

Filter Mikhael-Bhattacharyya (MB) Second Order Highpass non-inverting - Schematic only, no text included

Filter Multiple Feedback (MFB) Second Order Highpass inverting - Schematic only, no text included

Filter Sallen-Key (SK) Second Order Highpass I non-inverting - Schematic only, no text included

Filter Sallen-Key (SK) Second Order Highpass II non-inverting - Schematic only, no text included

Filter Twin-T Second Order Highpass non-inverting - Schematic only, no text included

High Pass Active Filter Collection - 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 achive any frequency cut-off you may need. The circuit does not specify an operational amplifier. The circuits should be used to select the needed resistor and capacitor components for a particular frequency knee and slope. …. [Designed by David A. Johnson]

Highpass filters use modified equal-element design - 05/24/01 EDN-Design Ideas In the circuit of Figure 1 , assume that a brush-type dc motor must drive a load back and forth between two endpoints on a lead screw. Optical sensors determine end of travel, and an SPDT switch selects to which end to send the load. The sensors themselves supply all the necessary directional logic, and a triac powers the motor with the necessary polarity of half-wave pulses from the 13….PDF have several circuits, scroll for this one.... [Design Idea by Richard Kurzrok, Queens Village, NY]

KHN (Inverting Input) Second Order Highpass inverting filter - Schematic only, no text included

KHN (Non-Inverting Input) Second Order Highpass non-inverting filter - Schematic only, no text included

Mikhael-Bhattacharyya (MB) Second Order Highpass non-inverting filter - Schematic only, no text included

Multiple Feedback (MFB) Second Order Highpass inverting filter - Schematic only, no text included

Sallen-Key (SK) Second Order Highpass I non-inverting filter - Schematic only, no text included

Sallen-Key (SK) Second Order Highpass II non-inverting filter - Schematic only, no text included

Subsonic/ Rumble Filter - A 36dB/octave 17 Hz high pass filter to remove ultra low frequencies (schematic added 6/07)

Twin-T Second Order Highpass non-inverting filter - Schematic only, no text included

Wideband filter uses image parameters - 26-Oct-00 Issue of EDN-Design Ideas You can design various lowpass and highpass filters using image parameters ( Reference 1 and Reference 2 ]. By cascading a highpass and a lowpass filter.…PDF has several circuits, please scroll to find this one.… [Design Idea by Richard M Kurzrok, RMK Consultants, Queens Village, NY]