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. 06, 2004
Filed:
Jun. 27, 2002
Robert Stengel, Pompano Beach, FL (US);
Nicholas Giovanni Cafaro, Coconut Creek, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A distributed amplifier consistent with certain embodiments of the present invention has a plurality of amplifier sections through N ( ) with each amplifier section having an input and an output. A plurality of N input transmission line sections are connected in series, with inputs of the through N amplifier sections interconnected at their inputs along the series of input transmission line sections. A plurality of N output transmission line sections are also connected in series, with outputs of the through N amplifier sections interconnected at their outputs along the series of input transmission line sections. A load ( ) can be driven by an output at the Nth amplifier section ( ). A high-pass filter ( ) connects a dummy load ( ) to the output of the first amplifier section ( ). The input and output transmission line sections can, for example, be lumped element T sections and the high-pass filter can be made of a lumped element half section. To achieve the desired stability enhancement, the high pass filter section has a cutoff frequency equal to or greater than the cutoff frequency of the output transmission line sections. A similar high pass filter and dummy load can be used in the input transmission line network.