Reducing the low frequency cut-off of a wideband power amplifier

An equalization technique is introduced which combats the problems of low frequency cut-off of a driver amplifier for a wideband LiNbO3 modulator operating at 0.56 Gbit/s. The circuit presented is suitable for the design of wideband power amplifiers or the improvement of the low frequency behaviour of a commercially available power amplifier. The circuit works independently of the shape of the low frequency roll off characteristic of the amplifier to be equalized.