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:
Oct. 27, 1998
Filed:
May. 21, 1997
Thomas P Bushey, Phoenix, AZ (US);
James S Caravella, Chandler, AZ (US);
Jeremy W Moore, Chandler, AZ (US);
Motorola, Inc., , US;
Abstract
A circuit and method modify data stored in a storage element (30) of a memory circuit (110) when high voltages used for such modification exceed transistor breakdowns. A charge pump (302) produces a pumped voltage (V.sub.P1) for modifying the data. A monitor circuit (304) produces an enable signal (V.sub.PEN) to activate other power supply voltages when the pumped voltage reaches a predetermined voltage level for allowing the data to be modified. A routing circuit (832) selects between the pumped voltage and a first voltage (V.sub.DD) in response to a first control signal (HVENABLEP) to produce a selected voltage. A switching circuit (802-808) passes the selected voltage to the storage element (30) to modify the data when the first supply voltage is selected by the routing circuit.