| 摘要 |
PURPOSE:To improve the stability of sounding by connecting a loss circuit, which has a resonance point on the outside of a transmission band, in series to an amplifier in a bi-directional repeater of direction separating filter type which uses the single amplifier. CONSTITUTION:One loss circuit LS is connected in series to each of the input side and the output side of an amplifier AMP. Therefore, even if the impedance of the line side viwed from a direction separating filter DF is changed to change the phase between sneak signals A and B, the quantity of sneak attenuation in a separate band is held large because of insertion of loss circuits LS. Consequently, the generation of sounding is suppressed sufficiently. |
