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:
Jan. 29, 2019
Filed:
Sep. 13, 2017
Applicant:
Siemens Medical Solutions Usa, Inc., Malvern, PA (US);
Inventors:
Frederick Alan Williams, Bellevue, WA (US);
Robert A. Hewitt, Sammamish, WA (US);
David A. Petersen, Fall City, WA (US);
Assignee:
Siemens Medical Solutions USA, Inc., Malvern, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/156 (2006.01); H03K 17/06 (2006.01); H02M 1/08 (2006.01); H02M 3/158 (2006.01);
U.S. Cl.
CPC ...
H03K 17/063 (2013.01); H02M 1/08 (2013.01); H02M 3/1588 (2013.01);
Abstract
For transformerless switching regulators, a current-mode controlled boost converter operates based on current sensing through a switch to ground, allowing use of common controllers. To avoid reverse current from a cascaded charge pump, the input of the charge pump is blocked by a diode from passing through the switch to ground and is itself separately switched to ground.