low pass filter

LOW PASS FILTER AIM :- To study and design first order Low Pass Filter using op-amp IC741 and to obtain frequeny response! THEORY: " frequeny seleti#e eletri iruit t$at passes eletri signals of frequenies and attenuates t$e signals of frequenies outside t$e brand is alle filter! T$e first order low pass filter onsists of a single %C networ& onnete in#erting input terminal of t$e operational amplifier! %esisters %1 and %F deter of t$e filter in t$e pass band! T$e low pass filter as ma'imum gain at f( )*+! T range from ) to F* is alled t$e pass band t$e frequeny range f ,f$ is alled t T$e first order low pass butter wort$ filter uses an % networ& for filtering! T used in t$e non in#erting onfiguration $ene it does not load down t$e %C netw %esistor %1 and %. determine t$e gain of t$e filter! /)0/in ( "f 0 12 3f0f $ "f ( 12 %f 0%1(passband gainof filter F(frequeny of t$e input signal F$(10. Π %C (*ig$ ut off frequeny of filter /)0/in(5ain of t$e filter as a funtion of frequeny T$e gain magnitude and p$ase angle equations of t$e LPF t$e an be obtained by /)0/in into its equi#alent polar form as follows 6/)0/in6 ( "f 0 √ 1 2 f0f l. Φ (- t a n - 1 f 0 f $ $ere Φ is t$e p$ase angle in degrees! T$e operation of t$e LPF an be #erified gain magnitude equation!

Upload: sunpnair

Post on 06-Oct-2015

4 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

DESCRIPTION

Lab experiment aim & theory

TRANSCRIPT

LOW PASS FILTER

AIM:-

To study and design first order Low Pass Filter using op-amp IC741 and to obtainfrequency response.THEORY:

A frequency selective electric circuit that passes electric signals of specified band of frequencies and attenuates the signals of frequencies outside the brand is called an electric filter. The first order low pass filter consists of a single RC network connected to the non-inverting input terminal of the operational amplifier. Resisters R1 and RF determine the gain of the filter in the pass band. The low pass filter as maximum gain at f= 0Hz. The frequency range from 0 to FH is called the pass band the frequency range f >fh is called the stop band.The first order low pass butter worth filter uses an Rc network for filtering. Theop-amp is used in the non inverting configuration, hence it does not load down the RC network. Resistor R1 and R2 determine the gain of the filter.

V0/Vin = Af /(1+ jf/f h)

Af = 1+ Rf /R1=passband gainof filter

F=frequency of the input signal

Fh=1/2RC =High cut off frequency of filter

V0/Vin=Gain of the filter as a function of frequency

The gain magnitude and phase angle equations of the LPF the can be obtained by converting V0/Vin into its equivalent polar form as follows

|V0/Vin| = Af /(1 +(f/f l2) =- t a n - 1 ( f / f h) Where is the phase angle in degrees. The operation of the LPF can be verified from the gain magnitude equation.

LOW PASS FILTER

Low-Pass Filter & High Pass Filter

Low pass filter l1 f12bsee0010

RC Low Pass Filter

Voltage Controlled Low Pass Filter Analog Design · Voltage Controlled Low Pass Filter Analog Design ... The cascaded 2 pole low pass filter ... this made the attenuation greater

First-Order Low-Pass Filter - Princeton University

Low Pass Filter Introduction

Active Filter (Low Pass)

PERANCANGAN LOW PASS FILTER DIGITALIIR DENGAN ... Low Pass...Perancangan sebuah filter digital yaitu low pass filter dengan spesifikasi sebagai berikut: melewatkan pita frekuensi dengan

Active Low-Pass Filter Design - Unitn

JS 1 Low Pass Filter

Active Low-Pass Filter Design