Upload File

active filter design techniques

prev
next
out of 73
Download Active Filter Design Techniques

Upload: auroraprincessdacanay

Post on 02-Jun-2018

224 views

Category:

Documents


3 download

Report

TRANSCRIPT

  • 8/11/2019 Active Filter Design Techniques

    1/73

    Active Filter Design Techniques - 2

    Fundamentals of Low-Pass Filters Low-Pass Filter Design High-Pass Filter Design Band-Pass Filter Design Band-Rejection Filter Design All-Pass Filter Design Practical Design Hints Design Tools

  • 8/11/2019 Active Filter Design Techniques

    2/73

    Fundamentals of Low-Pass Filters

    A filter is a device that passes electric signals at certain frequencies orfrequency ranges while preventing the passage of others . Webster.

    Passive Filter Active Filter

  • 8/11/2019 Active Filter Design Techniques

    3/73

    Passive Filter Active Filter

    Equivalent Filters

    Typical for filters > 1MHz.

    For freq < 1MHz, L isphysically large.

  • 8/11/2019 Active Filter Design Techniques

    4/73

    Gyrator Positive Impedance Inverter

    http://upload.wikimedia.org/wikipedia/commons/6/69/Gyrator.svg

  • 8/11/2019 Active Filter Design Techniques

    5/73

    Low-Pass Filter Design

    Normalized Frequency:

    Transfer Function:

  • 8/11/2019 Active Filter Design Techniques

    6/73

    Cascading of Passive Low-pass Filter Stages

  • 8/11/2019 Active Filter Design Techniques

    7/73

    Cascading of Passive Low-pass Filter Stages

  • 8/11/2019 Active Filter Design Techniques

    8/73

    Passive RC Low-Pass FilterResponses

    Gain Phase

    Roll-off Slope for 1 st Order:

    20dB/decade 6dB/octave

    Phase Shift for 1 st Order:

    0 @ low freq -90 @ high freq

  • 8/11/2019 Active Filter Design Techniques

    9/73

    Non Ideal Filter ResponseCharacteristics

    Gain Phase

    Passband Stopband

    1.5 Octaves

    Gradual transition fromPassband to Stopband

    Uneven gainin the pass

    band

    Nonlinearphase slope

    leading todistortion

  • 8/11/2019 Active Filter Design Techniques

    10/73

    Optimization of Filter Design

  • 8/11/2019 Active Filter Design Techniques

    11/73

    Optimization of Filter Design

  • 8/11/2019 Active Filter Design Techniques

    12/73

    Butterworth Filter Response

    Optimized for maximum flatness in the passband

  • 8/11/2019 Active Filter Design Techniques

    13/73

    Tschebyscheff Filter

    Optimized to sharpen the transition from passband to stopband

    Passband Stopband

    Steep TransitionSlopes

    Ripple in thePassband

  • 8/11/2019 Active Filter Design Techniques

    14/73

    Filters Optimized to Sharpen the Transition fromPassband to Stopband

    Ripple in

    Passband

    Ripple inStopband

  • 8/11/2019 Active Filter Design Techniques

    15/73

    Elliptic (Cauer) FilterOptimized for steepest transition from passband to stopband for a

    given filter order.Has ripple in both passband and stopband, however.

    Ripple inPassband

    Ripple inStopband

  • 8/11/2019 Active Filter Design Techniques

    16/73

    Infinite Impulse Response (IIR)Filter Design Template Filter in Software

  • 8/11/2019 Active Filter Design Techniques

    17/73

    Bessel Filter

    Optimized for linear phase response up to f c

  • 8/11/2019 Active Filter Design Techniques

    18/73

    Group delay is a measure of the transit time of asignal versus frequency.

    Group delay is a useful measure of phasedistortion, and is calculated by differentiating the

    phase response versus frequency.

    Group Delay

    Gain and

    Group Delayof a Bessel

    FilterConstant GroupDelay and Linear

    Phase in TransitionRegion

    http://en.wikipedia.org/wiki/Phase_responsehttp://en.wikipedia.org/wiki/Phase_response

  • 8/11/2019 Active Filter Design Techniques

    19/73

    Another way to say this is that group delay is ameasure of the slope of the transmission phaseresponse .

    The linear portion of the phase response isconverted to a constant value (representing theaverage signal-transit time) and deviations fromlinear phase are transformed into deviations fromconstant group delay.

    The variations in group delay cause signaldistortion, just as deviations from linear phase causedistortion.

    Group Delay

    http://en.wikipedia.org/wiki/Phase_responsehttp://en.wikipedia.org/wiki/Phase_responsehttp://en.wikipedia.org/wiki/Phase_responsehttp://en.wikipedia.org/wiki/Phase_responsehttp://en.wikipedia.org/wiki/Phase_responsehttp://en.wikipedia.org/wiki/Phase_response

  • 8/11/2019 Active Filter Design Techniques

    20/73

    Gain, Phase and Group Delays across Filter Types

    PhaseResponse

    Group delayGain

    Response

  • 8/11/2019 Active Filter Design Techniques

    21/73

    Quality or Q Factor

  • 8/11/2019 Active Filter Design Techniques

    22/73

    Filter Coefficient Design Tables

  • 8/11/2019 Active Filter Design Techniques

    23/73

  • 8/11/2019 Active Filter Design Techniques

    24/73

  • 8/11/2019 Active Filter Design Techniques

    25/73

  • 8/11/2019 Active Filter Design Techniques

    26/73

    Low-Pass Filter Design

  • 8/11/2019 Active Filter Design Techniques

    27/73

    Cascading of Filter Stages to Achieve Higher Order Filters

  • 8/11/2019 Active Filter Design Techniques

    28/73

  • 8/11/2019 Active Filter Design Techniques

    29/73

    First Order Filter Implementation

  • 8/11/2019 Active Filter Design Techniques

    30/73

    First Order Filter Implementation

  • 8/11/2019 Active Filter Design Techniques

    31/73

    First Order Filter Implementation

  • 8/11/2019 Active Filter Design Techniques

    32/73

    Second Order Filter Implementation

  • 8/11/2019 Active Filter Design Techniques

    33/73

    Second Order Filter ImplementationSallen and Key Topology for 2 nd Order Lowpass Filter

    Sallen and Key Topology for 2 nd Order Lowpass Filter

    (Unity Gain)

  • 8/11/2019 Active Filter Design Techniques

    34/73

    Second Order Filter ImplementationSallen and Key Topology for 2 nd Order Lowpass Filter

    Unity Gain

  • 8/11/2019 Active Filter Design Techniques

    35/73

    Sallen and Key Topology for 2 nd Order Lowpass Filter

    Unity Gain

  • 8/11/2019 Active Filter Design Techniques

    36/73

    Second Order Filter ImplementationMultiple Feedback Topology for 2 nd Order Lowpass Filter

  • 8/11/2019 Active Filter Design Techniques

    37/73

    Second Order Filter ImplementationMultiple Feedback Topology for 2 nd Order Lowpass Filter

    Sallen and Key

  • 8/11/2019 Active Filter Design Techniques

    38/73

    Second Order Filter ImplementationMultiple Feedback Topology for 2 nd Order Lowpass Filter

  • 8/11/2019 Active Filter Design Techniques

    39/73

    Second Order Filter ImplementationMultiple Feedback Topology for 2 nd Order Lowpass Filter

    where

  • 8/11/2019 Active Filter Design Techniques

    40/73

    Cascading of Filter Stages to Achieve Higher Order Filters

  • 8/11/2019 Active Filter Design Techniques

    41/73

    High-Pass Filter Design

  • 8/11/2019 Active Filter Design Techniques

    42/73

    High-pass Low-pass

    Noninverting

    Inverting

    First Order High- and Low-pass Filter Topologies

  • 8/11/2019 Active Filter Design Techniques

    43/73

    High-passLow-pass

    Noninverting

    First Order High- and Low-pass Filter Topologies

    Low-pass High-passExchange Rs with Cs

    1/

    S 1/S

  • 8/11/2019 Active Filter Design Techniques

    44/73

    High-passLow-passNoninverting

    First Order High- and Low-pass Filter Topologies

  • 8/11/2019 Active Filter Design Techniques

    45/73

    High-pass

    Noninverting

    First Order High- and Low-pass Filter Topologies

  • 8/11/2019 Active Filter Design Techniques

    46/73

    High-pass Low-pass

    Second Order High- and Low-pass Filter Topologies

    Sallen and Key

    Multiple Feedback

  • 8/11/2019 Active Filter Design Techniques

    47/73

    Low-pass to Band-pass Filter Design

    S

  • 8/11/2019 Active Filter Design Techniques

    48/73

    Low-pass to Band-pass Filter Design

    S

  • 8/11/2019 Active Filter Design Techniques

    49/73

    Low-pass to Band-pass Filter Design

  • 8/11/2019 Active Filter Design Techniques

    50/73

  • 8/11/2019 Active Filter Design Techniques

    51/73

    Low-pass to Band-pass Filter Design

    Wide-band Filters

    Narrow-band Filters

  • 8/11/2019 Active Filter Design Techniques

    52/73

    High-pass Low-pass

    Sallen and Key Second Order Topologies

    Band-pass

  • 8/11/2019 Active Filter Design Techniques

    53/73

    Sallen and Key Band-pass Filter

  • 8/11/2019 Active Filter Design Techniques

    54/73

    High-pass Low-pass

    Multiple Feedback Second Order Topologies

    Band-pass

  • 8/11/2019 Active Filter Design Techniques

    55/73

    Multiple Feedback Band-pass Filter

  • 8/11/2019 Active Filter Design Techniques

    56/73

  • 8/11/2019 Active Filter Design Techniques

    57/73

  • 8/11/2019 Active Filter Design Techniques

    58/73

  • 8/11/2019 Active Filter Design Techniques

    59/73

  • 8/11/2019 Active Filter Design Techniques

    60/73

  • 8/11/2019 Active Filter Design Techniques

    61/73

  • 8/11/2019 Active Filter Design Techniques

    62/73

  • 8/11/2019 Active Filter Design Techniques

    63/73

  • 8/11/2019 Active Filter Design Techniques

    64/73

  • 8/11/2019 Active Filter Design Techniques

    65/73

    Active Filter Design Techniques

    Fundamentals of Low-Pass Filters Low-Pass Filter Design High-Pass Filter Design Band-Pass Filter Design Band-Rejection Filter Design All-Pass Filter Design Practical Design Hints Design Tools

  • 8/11/2019 Active Filter Design Techniques

    66/73

  • 8/11/2019 Active Filter Design Techniques

    67/73

    Band-Pass Filter Design

  • 8/11/2019 Active Filter Design Techniques

    68/73

  • 8/11/2019 Active Filter Design Techniques

    69/73

    Band-Rejection Filter Design

  • 8/11/2019 Active Filter Design Techniques

    70/73

    All-Pass Filter Design

  • 8/11/2019 Active Filter Design Techniques

    71/73

  • 8/11/2019 Active Filter Design Techniques

    72/73

    Practical Design Hints

  • 8/11/2019 Active Filter Design Techniques

    73/73


Shunt active power filter

Active Power Filter Review

The Active Filter

CONTROL TECHNIQUES FOR ACTIVE POWER FILTER FOR … · Control Techniques For Active Power Filter For Harmonic Elimination & Power Quality Improvement 26 Fig.3. Classification of active

Active filter

Active Power Filter

"Chapter 16 - Active Filter Design Techniques" -

Chapter 3 Active Filter

Filter Design Techniques

Practical Active Filter Design

ALL MODE ACTIVE FILTER

Shunt Active Power Filter: A Review on Phase ......electronics Review Shunt Active Power Filter: A Review on Phase Synchronization Control Techniques Yap Hoon 1, Mohd Amran Mohd Radzi

PowerAct Active Filter

shunt active filter report

A REVIEW ON ACTIVE POWER FILTER FOR POWER QUALITY IMPROVEMENT · Keywords- Shunt Active Power Filter, Power Quality, Control Techniques, THD; I. INTRODUCTION For the last three decades

Active Power Filter For Power Quality Improvement - irjet.net · PDF fileActive Power Filter For Power Quality Improvement ... PWM techniques applied to a voltage source inverter consist

Electronic Devices Active Filters · of active filters are: low pass filter, high pass filter, band pass filter, band stop filter (Notch filter ) 1. LOW PASS FILTER ... -60dB/decade

Active Filter Design - CK · PDF fileThis report describes how an active low pass filter is designed, ... Conclusion ... Active Filter Design Carsten Kristiansen

Chapter 15 Active Filter Circuits - Universiti Tunku Abdul ...staff.utar.edu.my/limsk/Analog Electronics/Chapter 15 Active Filter... · Chapter 15 Active Filter Circuits ... The damping

Active Filter Design Made Easy With WEBENCH® Active Filter

PSO-Based PI Controller for Shunt APF in Distribution ... · active filter is its control scheme strategy that is implemented in the active filter controller. There are myriad techniques

1SXP982003D0201 Active Filter Brochure

"Chapter 16 - Active Filter Design Techniques"

Filter Inspection Techniques

Active Filter Notes

Active Filter Design (MatLab)

PERFORMANCE INVESTIGATION OF SHUNT ACTIVE POWER FILTER ... · A. Shunt active power filter Shunt active power filter is voltage source inverter which can inject harmonics current

Control Techniques for Active Power Filters {Revised} · 1 Control Techniques for Active Power Filters 1 Abstract There have been many variants of the active power filter proposed

Active Filter Design Techniques - Universitas Padjadjaranftp.unpad.ac.id/orari/orari-diklat/teknik/homebrew/filter/active... · Bessel low-pass filters, therefore, provide an optimum

Active Filter Design Techniques - seas.gwu.eduece121/Spring-11/filterdesign.pdf · 16-1 Active Filter Design Techniques Thomas Kugelstadt 16.1 Introduction What is a filter? A filter

Current Controllers of Active Power Filter for Power ... · PDF file2 describes the current control techniques of active power ... ated using sinusoidal PWM, ... Controllers of Active

Ref:080222HKNEE3110 Active Filter (Part 1)1 Lecture 4 Active Filter (Part I) Introduction of passive and active filter Categories of filter –Low pass,

Development and Implementation of Novel Techniques for the Control of Shunt Active Filter

Reduction of Harmonics using Active Filter for Power ... · PDF fileReduction of Harmonics using Active Filter for Power Quality Improvement ... There are various PWM techniques

Active and Passive Filter