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:
Dec. 11, 2007
Filed:
Dec. 12, 2005
Moises E. Robinson, Austin, TX (US);
Marwan M. Hassoun, Davis, CA (US);
Earl E. Swartzlander, Jr., Austin, TX (US);
Moises E. Robinson, Austin, TX (US);
Marwan M. Hassoun, Davis, CA (US);
Earl E. Swartzlander, Jr., Austin, TX (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
A method and apparatus for capacitance multiplication using two charge pumps. A first charge pump () provides a current signal (I) that is first conducted by a resistor () of an RC network and then split into three current paths prior to being conducted by a capacitor of the RC network. A first current path provides current to the capacitor () of the RC network from node (). A second current path multiplies the current conducted by capacitor () by a first current multiplication factor. A third current path provides current to a second charge pump, which multiplies the current from the first charge pump by a second current multiplication factor that has a fractional value with an inverse magnitude sign relative to the first current multiplication factor. The combination of the second and third current paths effectively multiplies the capacitance magnitude of capacitor ().