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:
Apr. 27, 1999
Filed:
May. 21, 1997
Applicant:
Inventors:
James S Caravella, Chandler, AZ (US);
David F Mietus, Phoenix, AZ (US);
Jeremy W Moore, Chandler, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365226 ; 36518518 ; 36518533 ;
Abstract
A current limiting circuit (70) controls the leakage current of a memory circuit (24) of a portable wireless device (10) while operating in a standby mode. A first semiconductor well (64) isolates the memory circuit (24) that is disposed in a second semiconductor well (66) from a substrate (62). In the standby mode the current limiting circuit (70) is switched to a non-conduction mode that limits the leakage currents of a diode formed by the first semiconductor well (66) with the second semiconductor well (64) and a diode formed by the second semiconductor well (64) with the substrate (62).