Coupling
In electronics, coupling refers to the transfer of electrical energy from one circuit or network to another.
- Capacitive Coupling: Uses capacitors to pass AC signals while blocking DC.
- Inductive Coupling: Transfers energy via magnetic fields (e.g., transformers).
- Direct Coupling (DC): Connects stages directly; passes both AC and DC.
- Optical Coupling: Uses optocouplers for isolation and signal transfer.
Used in amplifiers, filters, and signal isolation circuits.