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July 1969 (vol. 18 no. 7)
pp. 669-670
V.L. Larrowe, Institute of Science and Technology University of Michigan
This paper describes a special analog correlator which is used for optical character recognition (OCR). The correlator is built around a special" card capacity read only storage (CCROS)" memory. Each bit in this CCROS memory is represented by a 1-pF capacitor, which may be removed from the circuit by appropriately punching a special Hollerith card on which is printed one plate of the capacitor. The other plate of the capacitor is printed on a printed circuit board pressed against the reverse side of the card, and the portion of the card between the two plates forms the capacitor's dielectric.
Citation:
V.L. Larrowe, "R69-20 An Analog Card Capacity Correlator as Applied to OCR," IEEE Transactions on Computers, vol. 18, no. 7, pp. 669-670, July 1969, doi:10.1109/T-C.1969.222743
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