Refresh generator system for a dynamic memory
CA 1211857 A · Owner: International Business Machines Corporation · Inventors: Dean, Mark E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A refresh generator system for a dynamic memory in a data processing system, including a processor which is responsive to a hold request signal to relinquish control of the local bus and generate a hold acknowledge signal comprises logic means to generate a hold request signal in response to an output from a refresh timer circuit. A logic circuit is responsive to a hold request a, corresponding hold acknowledge, and the timer signal to generate a refresh control signal. This signal generates a refresh signal for the memory control circuits increments, a counter circuit and initiates operation of a sequencer circuit. The sequencer then gates the output of the counter circuit to provide a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.