Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
Filtering
is very popular and important in the field of Electrical and Electronic
Engineering. In the field of Telecommunication, filter is used in multiplexing
whereby several different signals are transmitted through the same transmission
channel and never mixed up because of virtue of their separated frequencies and
are separated at the end of their receiving end again by the process of
demultiplexing. In entertainment industries, audio circuits in the form of
filters are used to give music distinct tones of bass, treble etc. In radio
transmission, filters are used in separating transmission channels both in FM
and AM bands thereby giving each station a distinctive transmission channel. In
amplification devices using amplifiers, attempt in amplifying intelligent
signals results in the amplification of unwanted signals in the form of noise.
To minimize or reduce this, filters are used in removing the unwanted signals.
Filters come in different forms but broadly it can be classified into analog
and digital filters. It can also be classified by the nature of components used
in its design. By this classification we have active and passive filters. In
this paper, the development and characterization of a first order high pass
active filter is shown.. Operational
Amplifier chip OP AMP 741 was used in achieving this. The Transfer Function (TF) equation of the
filter is derived with the Band Width (BW), Cut-off Frequency (Fc) and the
Quality Factor (Q) specified. The developed first order Active High Pass filter
was tested by application of varied frequencies with fixed input voltage to its
input while the performance monitored at the output. Finally the frequency
response plots indicative of the designed specification in ratio of Vo/Vin and
in dB were plotted and shown.
Country : Nigeria
IRJIET, Volume 7, Issue 12, December 2023 pp. 266-270