Tuned Coupled Circuits
When a capacitor is introduced in the primary and/or in the secondary circuit of a transformer, the circuit becomes selective and the transformer is termed as a tuned coupled circuit or a tuned transformer.
Tuned circuits are used for amplification of signals in the radio frequency (RF) range, such as in broadcasting receivers.
Tuned circuits are of two types:
- Single Tuned Circuit, and
- Double Tuned Circuit