Discovery Semiconductors Inc.Discovery Semiconductors Inc. has added three models to its DSC R40X line of photoreceivers. Each photoreceiver consists of an InGaAs/InP infrared photodiode and preamplifier and has a wavelength response from 0.8 to 1.6 µm. The DSC R403 also has a postamplifier. The photoreceivers feature bandwidths from 10 to 14 GHz, and the typical gain at 1.55 µm ranges from 80 to 1000 V/W. 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