Types of Systems – CT, DT and Hybrid Systems | Course: Signals & Systems
SYSTEM
A system is a device which transforms an input signal (also known as excitation) into an output signal (also known as response).
➜ System as an Arrangement of Subsystems:
System can also be viewed as an arrangement of subsystems or elements or components,
which are connected together to achieve an objective. For example, a TV system is
an arrangement of tuners, amplifiers, etc. to achieve an objective of education,
entertainment, communication, etc.
➜ Computer System:
Computer system is an arrangement of subsystems like input, output, memory and
processing devices.
➜ Communication System:
Communication system is an arrangement of transmitter, channel and receiver.
➜ CT System (Continuous-Time System):
Associated signals are continuous.
➜ DT System (Discrete-Time System):
Associated signals are discrete.
➜ Hybrid System:
A system involving both continuous-time and discrete-time signals.
