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Array Word Select

IP.com Disclosure Number: IPCOM000052189D
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11

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Dorler, JA Mosley, JM Seeger, RO [+details]


Array designs have been employing current source schemes for word path selection for quite some time. These current sources are usually much higher than required for simple DC operations. The added current is designed in to achieve an acceptable access time, since drain lines are so heavily capacitive. A typical current waveform found on a drain line is shown in Fig. 1. This waveform starts at a DC deselect current level and switches to a DC select current. Typical current values are in the order 1.0 ma per bit in the selected case. Actually, a current of approximately 0.5 ma per bit is all that would be required for DC level generation, however, the word access path would be unacceptable if the drain line current were reduced to this amount.