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Silicon read-out devices with input direct injection and buffered direct injection circuits and charge coupled devices (CCD) multiplexers to be used with or ptnphotovoltaic (PV) multielement arrays were designed, manufactured and tested in T77-300 K temperature region. Into these read-out devices were incorporated the testing switches which attach the sources of direct injection transistors to the common load resistors to imitate the output signal of mercury cadmium telluride (MCT) photodiodes. The silicon read-out devices for 2x64 n-p-or p+-n.. linear arrays and 2x4x 128(144) time delay and integration (TDI) arrays with skimming and partitioning functions were manufactured by n-or p-channel MOS teclmology with buried channel CCD register. The designed CCD readout devices are driven with four-or two-phase clock pulses.