On-Line Demos
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| Signals and Sounds | Sinusoids and how they look and sound | 5 |
| Periodicity of Sums of Sinusoids | Examine the sum of two sinusoids and determine when their sum is periodic | 6 |
| Convolution of Discrete-Time Signals | Compute the convolution of pairs of discrete-time signals | 52 |
| Convolution of Continuous-Time Signals | Compute the convolution of pairs of continuous-time signals | 79-84 |
| Sums of Sinusoids | Examine the sum of sinusoids in the time domain and in the frequency domain | 97-100 |
| Convergence of Fourier Series | Examine the convergence of Fourier series (square wave and triangular wave) | 105-110 |
| Fourier Transform of Exponential Signal | Displays Fourier Transform of exponential as the bandwidth varies | 115-116 |
| Response to Sinusoidal Inputss | Examine the effect of a lowpass filter on sinusoids | 224-227 |
| Response to Periodic Inputs | Response of a lowpass filter to a pulse train as the bandwidth is varied | 224-228, 229-234 |
| Sampling and Aliasing | Illustrates sampling in the time domain and frequency domain for bandlimited and nonbandlimited signals | 247 |
| DTFT and DFT of Pulse | Examine the approximation of a DTFT by a DFT | 186-187 |
| Pole Position and Step Response | Relationship between pole positions and step response | 421-429, 480 |
| Interactive Root Locus | Root locus with the ability to move poles and zeros | 510-516, 530-534 |
| Pole Positions and Impulse Response | Relationship between z-domain pole positions and impulse response | 378-380 |
| Digital Filtering of Continuous-Time Signals | Examples of digital filtering of continuous-time signals | 552-555 |
| Mass Spring Damper System | Mass Spring Damper example to show time response, frequency response, and resulting motion of system (displayed through animation) | 92,228, 325, 433, 442, 453, 482 |
The applets were written with the help of Georgia Tech students Raymond Garcia, Darren Garner, James Ho, Jason Meeks, Johnny Wang and Brian Wilson. Their help is greatly appreciated.