Charge transfer memories

Details Charge transfer memories Charge transfer memories

1975-06-09

1976-10-12

Robinson, Thomas A.

Communications: electrical

Digital comparator systems

340173R, 307238, G11C 700

Patent

active

039861767

ABSTRACT:
Charge transfer memories such as those of the bucket-brigade or of the charge-coupled device (CCD) type include, at each location, a store which is separate from the normal means for charge storage. Charge is transferred from the normal means of storage to the separate store at each location during a first period of time and may be sensed during later intervals of time to provide multiple "copies" of the stored information. In one form of such a memory especially suitable for the storage of digital data, each separate store includes an internal loop for refreshing the charge. In other forms of such memories, means are provided for reducing the effects of variation in threshold voltage from location-to-location of the transistors associated with the separate stores. These are especially suitable for analog storage.

REFERENCES:
patent: 3506851 (1970-04-01), Polkinghorn et al.
patent: 3646525 (1972-02-01), Linton et al.
patent: 3713114 (1973-01-01), Linton et al.
patent: 3800295 (1974-03-01), Anderson, Jr. et al.
patent: 3891977 (1975-06-01), Amelio et al.

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