24 August 1992 Analog multiply/accumulate implementation and performance results on the DOC II platform
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Analog testing and primitive evaluation has been performed on OptiComp's second generation digital optical computer (DOC II) platform. Preliminary results indicate that analog addition can be achieved at up to 6 bits of accuracy. The DOC II components which have been integrated for this study include: the laser diode array, the laser collimator and 1 X 1 imaging barrel, the point source modulator GaP Bragg cell, and a single channel APD/transimpedance amplifier. Two analog pulse trains are used to drive two independent sets of Bragg cell channels. The first order deflected light is collected and summed on an APD photodetector, amplified with a high gain, wide bandwidth, transimpedance amplifier and digitized using an Hewlett Packard digitizing scope. Testing was performed using a GPIB instrumentation interface. Ultimately, this analog computing architecture could produce a 256 vector multiply to 256 X 256 matrix which would yield a product with 8 bit resolution.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frederick F. Zeise, Richard V. Stone, Peter S. Guilfoyle, "Analog multiply/accumulate implementation and performance results on the DOC II platform", Proc. SPIE 1704, Advances in Optical Information Processing V, (24 August 1992); doi: 10.1117/12.139920; https://doi.org/10.1117/12.139920


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