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:
Feb. 15, 2011
Filed:
Jul. 06, 2009
Mel Bazes, Haifa, IL;
Mel Bazes, Haifa, IL;
Abstract
A phase locked loop with a charge pump circuit has increased stability and phase margin. The charge pump circuit feeds back its voltage output to generate a reference current. In one embodiment, the charge pump circuit comprises a current generator responsive to a charge voltage that has been output from the charge pump. The current generator generates a reference current based on the charge voltage and a supply voltage. The reference current may comprise a bootstrap current and an auxiliary current. The charge pump circuit also comprises a current mirror that generates a source current and a sink current that are substantially the same as the reference current. The charge pump circuit further comprises a charge voltage generator to generate the charge voltage based on the source current and the sink current. A related method is also disclosed. Other embodiments are provided, and each of the embodiments can be used alone or in combination with one another.