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:
Nov. 15, 2005
Filed:
Dec. 18, 2003
James P. Ross, Lakeville, MN (US);
James P. Ross, Lakeville, MN (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
Described are regulated cascode amplifiers with improved low-voltage performance. The improved amplifier is similar to conventional regulated cascode amplifiers, including a cascode circuit and a feedback amplifier. The cascode circuit conventionally includes two output transistors, the first of which preferably remains in saturation to provide a relatively stable output resistance over a range of output voltages. A booster circuit in accordance with one embodiment maintains the first transistor of the cascode circuit in saturation over a broader range of output voltages, and consequently extends the low-end of the operating range of the cascode amplifier.