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:
Aug. 20, 2013
Filed:
Dec. 10, 2008
Minghui Chen, San Diego, CA (US);
Minghui Chen, San Diego, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
An amplifier with multiple stages and having improved reliability is described. The multiple amplifier stages are coupled in parallel and include at least one switchable amplifier stage. Each switchable amplifier stage may be operated in an on state or an off state and includes a gain transistor and a cascode transistor. The gain transistor amplifies an input signal and provides an amplified signal in the on state and is disabled in the off state. The cascode transistor buffers the amplified signal and provides an output signal in the on state and is disabled based on an off voltage in the off state. The off voltage may be greater than zero volts or may have one of multiple possible values. The off voltage may be generated based on an output signal level, e.g., may be set to different values for different ranges of output signal level.