Abstract: An interface structure (14) for an hybrid infrared charge coupled device (10) or other signal processing system provides for partial direct injection of the output current of an incorporated detector (12) or other signal source into the incorporated CCD (11). The remaining output current is bypassed through a load resistor (R.sub.L) to a load voltage source (V.sub.L). An injection path resistor (R.sub.I) can be included to provide a voltage near the input threshhold bias of the CCD so that it operates in its linear region even at low detector outputs. The disclosed resistors can be conveniently fabricated using an additional polysilicon layer on either the detector or the CCD.The disclosed interface structure makes effective use of the limited charge-handling capability of the CCD. It also makes possible the operation of the detector in an inverted mode to avoid saturation by bright scene objects. In addition, the higher available detector bias reduces crosstalk between detector elements.