Digital memory means with an accurate reference signal

Details Digital memory means with an accurate reference signal Digital memory means with an accurate reference signal

G - Physics

11

C

352/36, 352/82.2

G11C 11/21 (2006.01) G11C 7/04 (2006.01) G11C 19/28 (2006.01) G11C 27/04 (2006.01)

Patent

CA 1198818

ABSTRACT OF THE DISCLOSURE A digital memory comprises a charge coupled device (CCD) that includes a reference signal storage section. The digital input to the CCD includes an input reference signal and an information signal having a plurality of data levels, for example, a digital "0" and "1". The input reference signal includes a reference bit at the higher data level. The reference signal storage section divides the level of the reference bit to provide a reference level signal halfway between the two data levels. Thus, any shift in the data levels due, for example, to temperature changes in the CCD, affects the reference level signal to the same degree and the reference level can be kept exactly halfway between the data levels.

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