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Embedded analogue nonvolatile memory with feedback-controlled programming circuit on-chip

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4 Author(s)
Lu, C.C. ; Dept. of Electron. Eng., Nat. Tsin Hua Univ., Hsinchu, Taiwan ; Chen, P.L. ; Huang, C.D. ; Chen, H.

An analogue nonvolatile memory is presented, which is not only CMOS-compatible but also capable of storing analogue currents with a resolution of more than eight bits. The programming process is controlled by a hysteretic comparator on-chip, which stops the injection current automatically by negative feedback, regardless of the programming nonlinearity and device mismatches. With the simple, on-chip programming circuit, the proposed analogue memory is capable of storing currents ranging from 1 to 18 μA accurately with negligible variations across different memory cells.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 12 )