The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1977
Filed:
Nov. 28, 1975
Applicant:
Inventors:
Edwin P Fisher, N. Abington, MA (US);
Robert B Johnson, Billerica, MA (US);
Assignee:
Honeywell Information Systems, Inc., Waltham, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
3401 / ; 3401 / ;
Abstract
Apparatus and method for generating substrate bias for the refresh apparatus of volatile memory elements associated with data processing units. A refresh oscillator in the refresh apparatus is utilized to drive a chopper circuit or high level driver in combination with a rectifier network for obtaining raw negative voltage. The raw voltage is filtered and adjusted to the correct value on the metal oxide semiconductor (MOS) memory board and distributed to each random access memory (RAM).