| Abstract: | The response of transformer-coupled and transformerless marine seismic streamers feeding seismic amplifiers with and without input transformer is analysed with the aid of equivalent circuits. Examples are calculated showing how improvements in the performance of two practical transformer-coupled streamers, namely the increase in bandwidth and sensitivity and the decrease in the dependence on cable length, can be achieved when some of the streamers parameters are properly chosen. Transformerless streamer systems driving either a voltage amplifier or a “charge” amplifier are shown to be inherently superior to those with coupling transformers, save possibly in respect of their sensitivity to cross-feed. |
