| 摘要 |
PURPOSE:To widely shorten an access time compared with an original memory circuit by adding a means to compare an inputted numeric value with the numeric value set beforehand and increment the contents of a counting part each time of coincidence to an existing circuit. CONSTITUTION:The circuit is equipped with read only memory circuits 1A-1D, counters 2A-2D, 5, comparators 3A-3D, AND gates 6A-6D, etc. Immediately after the data of the prescribed address of a memory circuit are read and written, a new address to increment a prescribed address is inputted, the data of the new address are read and written and then, the circuit to set already the address data is added to existing memory circuits 1A-1D. Thus, only when the address is incremented and the data are read and written, the memory circuits 1A-1D having an access time much smaller than the access time of an original memory circuit are obtained and the access time of the memory circuits 1A-1D can be widely shortened.
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