PROGRAMMABLE HYBRID BALANCING TECHNIQUE FOR A TELEPHONE SET
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2002-Apr-25
In a telephone set, a common way to insure that the signal generated in the microphone does not produce any signal in the earphone is achieved by taking the earphone signal between the centre points of a bridge configuration. This bridge is formed by the line impedance Z,, by an hybrid balancing irnped- ante Z,, and by resistors R, and R, according to Figure 1.