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. 01, 2011
Filed:
Aug. 29, 2008
Jeffrey A. Frei, Hawthorn Woods, IL (US);
Jeffrey A. Frei, Hawthorn Woods, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The application discloses a method and apparatus for adjusting internal load impedances, by section, at feed points present on a distributed amplifier's output transmission line. The method includes determining a summing-point load impedance (Z) at an off-chip output transmission line of the distributed amplifier. The method further includes determining a driving-point load impedance (Z) at an output of an on-chip power transistor. The driving-point load impedance diverges and disperses over frequency from that summing-point load impedance due to reactance of at least one on-chip component coupled to the output of the on-chip power transistor. The method then includes determining and providing an offset to summing-point load impedance (Z) based on the driving-point load impedance (Z) such that the driving-point load impedance (Z) converges to the summing-point load impedance (Z) of that distributed amplifier section.