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:
Aug. 25, 1998
Filed:
Jul. 10, 1997
Joseph A Thomsen, Gilbert, AZ (US);
Microchip Technology Incorporated, Chandler, AZ (US);
Abstract
A progressive start-up charge pump that eliminates the start-up problems of p-channel charge pump stages by starting the charge pump one stage at a time. The charge pump has a plurality of charge pump stages wherein each of the plurality of charge pump stages are coupled to a successive charge pump stage in a cascade mode. An enabling circuit is coupled to each of the plurality of charge pump stages for individually starting each of the plurality of charge pump stages one charge pump stage at a time starting with a last charge pump stage and successively turning on a directly previous charge pump stages until the first charge pump stage is started. This will ensure that the voltage output node is at a greater potential than the voltage input node for each of the plurality of charge pump stages during start-up.