EXTERNAL OPTICAL MODULATION SYSTEM COMPRISING A PREDISTORTER
摘要
The present invention relates to a method and to a signal predistorter circuit for eliminating the nonlinearities in the input/output characteristics of nonlinear stages, in particular for eliminating the third-order nonlinearities. More particularly, it relates to a method and to a predistorter circuit for external optical modulators of television signals. The method for predistortion of a signal of variable amplitude comprises the phases of: delivering the said signal to at least one first distorter circuit; biasing the said at least one first distorter circuit; distorting the said signal in the said at least one first distorter circuit; characterized in that the said phase of biasing the said at least one first distorter circuit comprises the phase of maintaining a substantially constant preset voltage value on varying the amplitude of the said signal at the said at least one first distorter circuit.
申请公布号
WO9852304(A1)
申请公布日期
1998.11.19
申请号
WO1998EP02696
申请日期
1998.05.08
申请人
PIRELLI CAVI E SISTEMI S.P.A.;MUSSINO, FRANCO;NOTARGIACOMO, MASSIMO;GOBETTI, GIANLUCA;RAVASIO, GIUSEPPE;ZAMMARCHI, CLAUDIO