1. 1.5 Continuous-Time and Discrete-Time Systems
Systems: Transform input signals into output signals
Continuous-Time Systems: Both input and output signals are continuous-time signals.
Discrete-Time Systems: Both input and output signals are discrete-time signals.

5. 1.5 Continuous-Time and Discrete-Time Systems
1.5.2 Interconnection of Systems
A complicated system can be constructed by interconnections of simple systems
Three Basic Interconnections: Series or Cascade, Parallel and Feedback Interconnections

6. 1.6 Basic System Properties
1.6.1 Systems with and without Memory
Memoryless Systems

7. 1.6 Basic System Properties
1.6.1 Systems with and without Memory
Systems with Memory
other than the current time

8. 1.6.2 Invertibility and Inverse Systems Invertible Systems

9. Causality

10. Stability
Stable Systems: a bounded input generates a bounded output

11. Stability
Stable Systems: a bounded input generates a bounded output

12. 1.6.5 Time Invariance Examples: y(t)=sin[x(t)]; y[n]=nx[n]; y(t)=x(2t)

13. Linearity
Superposition property: Additivity property and Scaling or homogeneity property

14. Linearity
Superposition property: Additivity property and Scaling or homogeneity property

15. Linearity
Scaling or homogeneity propertyzero-in/zero-out property

16. Linearity

17. 1.31