Call for Papers - African Journal of Biological Sciences, E-ISSN: 2663-2187, ...
Cascaded First-Order Filters
1. Dr. Allen Robinson
Academic Professional
School of Electrical and
Computer Engineering
School of Electrical and Computer Engineering
Cascaded First-
Order Filters
Introduce cascaded first-order op-amp filters
11. Dr. Allen Robinson
Academic Professional
School of Electrical and
Computer Engineering
School of Electrical and Computer Engineering
Second-Order
Transfer Functions
Introduce second-order filter transfer functions
12. Introduce second-order filter transfer functions
Examine features of transfer functions
Lesson Objectives
12
13. Ratio of output voltage to input
voltage as a function of frequency
For any frequency, the transfer
function is a complex number that
indicates how the filter modifies
the magnitude and phase of the
input to produce the output
Filter Transfer Function
13
19. Butterworth and Chebyshev
Types of transfer functions
For second-order filters, the type is
determined by the Q value
Butterworth (Maximally Flat)
Chebyshev
19
24. Dr. Allen Robinson
Academic Professional
School of Electrical and
Computer Engineering
School of Electrical and Computer Engineering
Second-Order
Transfer Functions
Introduce second-order filter transfer functions
25. Introduce second-order filter transfer functions
Examine features of transfer functions
Lesson Objectives
25
26. Ratio of output voltage to input
voltage as a function of frequency
For any frequency, the transfer
function is a complex number that
indicates how the filter modifies
the magnitude and phase of the
input to produce the output
Filter Transfer Function
26
32. Butterworth and Chebyshev
Types of transfer functions
For second-order filters, the type is
determined by the Q value
Butterworth (Maximally Flat)
Chebyshev
32
37. Dr. Allen Robinson
Academic Professional
School of Electrical and
Computer Engineering
School of Electrical and Computer Engineering
Second-Order
Filter Circuits
Introduce second-order Sallen-Key filter circuits
40. Lowpass Design Equations
Special Case 2
(K = 1, Solve for R’s)
Special Case 1
(K = 1, Solve for C’s)
Special Case 3
(R’s equal and C’s equal)
Can simplify with R1 and R2 are interchangeable
40
49. Dr. Allen Robinson
Academic Professional
School of Electrical and
Computer Engineering
School of Electrical and Computer Engineering
Filtering
Demonstration
Demonstrate filtering of signals
50. Examine frequency spectra of signals
Demonstrate filtering by a second-order filter circuit
Lesson Objectives
50