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

: Dietrich, E.; Enning, B.

Frequenz 41 (1987), No.5, pp.123-5
ISSN: 0016-1136
ISSN: 2191-6349
Journal Article
Fraunhofer HHI ()
electro-optical devices; integrated optics; modulators; optical modulation; power amplifiers; wideband amplifiers; wideband power amplifier; equalization technique; low frequency cut-off; driver amplifier; 0.56 Gbit/s; wideband linbo3 modulator

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.