emFilters Reference is the combination of the following 3 individual modules :

Electronic Filters Reference
FIR Filter Design Reference
IIR Filter Design Reference

Electronic Filters Reference covers the following concepts:
Filter Fundamentals
Filter Definition
Filter Classification
Active Filters
Passive Filters
Digital Filter
Filter Application

Filter Fundamentals - This covers the basic concepts of filters.

Filter Definition - Definition of filters, Pass Band Filter, Stop Band Filter and Cut-Off frequency are covered under this.

Filter Classification - This includes classification based on Circuit Components [Active Filter and Passive Filter] and Classification based on Signals [Analog Filter and Digital Filter].

Active Filters - Low Pass Filters [Butterworth Filter,Bessel Filter,Chebyshev Filter], High Pass Filter, Band Pass Filter, Band Reject Filter and Switched Capacitor Filter concepts along with their frequency response are included under this with the diagrams and curves wherever applicable.

Passive Filters - Passive Filters consist of M-Derived Filter [Definition and Low Pass and High Pass], Prototype Filters [Low Pass, High Pass, Band Pass, Band Reject], Band Pass Filter and Band Reject Filter definition along with their frequency response. Included diagrams and curves wherever applicable.

Digital Filters - This includes the FIR filter and IIR filter concepts.

Filter Application - Get to know the applications of Filters in various fields.

Design FIR filters with required specifications and visualize the frequency plot and time plot. Frequency Plot and Time Plot are displayed with just a click!

Vital Features of FIR Filter design:
Designing a Low Pass Filter, High Pass Filter, Band Pass Filter, Band Stop Filter is just with few clicks.
Various Windowing techniques viz., Rectangular, Bartlett, Hamming, Hanning, Blackman are available.
Time Response coefficients and Frequency Response coefficients can also be saved for future reference.
Frequency plot with shade and without shade will be displayed with numerous coloring options.
Time plot with shade and without shade will be displayed with numerous coloring options.

Design IIR filters with required specifications and visualize the Frequency Response, Impulse Response, Phase Plot and Co-efficients with just a click!

Vital Features of IIR Filter Design:
Designing Low Pass Filter, High Pass Filter is just with few clicks.
Order of the filter (upto max. of 18th order) can be chosen by the customer.
Impulse Response co-efficients, Phase Response co-efficients and Frequency Response coefficients can be viewed with a click.
Impulse Response coefficients, Phase Response coefficients and Frequency Response coefficients can also be saved for future reference.
Frequency plot with shade and without shade will be displayed with numerous coloring options.
Phase plot with shade and without shade will be displayed with numerous coloring options.
Impulse Response with shade and without shade will be displayed with numerous coloring options.

Benefits:
Designing of filters made easy with this application.
A good knowledge tool for beginners.
Time saving utility.
Improves Professional Productivity.

A must have worthy product for engineers desiring to achieve perfection in the field of digital filter design and those who desirous to improve their productivity!