Applications
Hybrids are used in telephones (see telephone hybrid) to reduce the sidetone, or volume of microphone output that was fed back to the earpiece. Without this, the phone user's own voice would be louder in the earpiece than the other party's. Such hybrids also had their windings so arranged as to act as an impedance matching transformer, matching the low-impedance carbon button transmitter to the higher impedance parts of the system. Today, the transformer version of the hybrid has been replaced by resistor networks and compact IC versions, which uses integrated circuit electronics to do the job of the hybrid coil.
Radio-frequency hybrids are used to split radio signals, including television. The splitter divides the antenna signal to feed multiple receivers.
Read more about this topic: Hybrid Coil