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. 27, 2009
Filed:
Jan. 31, 2007
Boris Murmann, Palo Alto, CA (US);
Jason C. HU, Cupertino, CA (US);
Boris Murmann, Palo Alto, CA (US);
Jason C. Hu, Cupertino, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Abstract
Amplifier circuits and methods are implemented using a variety of different embodiments. According to one such embodiment, an amplifier circuit is implemented to amplify a first signal to drive an output load. The circuit has a field-effect transistor (FET) with a gate, a source and a drain. A switch arrangement is coupled to the gate, the source and the drain. State control logic provides state information for a first state and a second state. In the first state, the first switch arrangement connects the first signal to the gate and connects the drain and source to reference voltages. In the second state, the switch arrangement disconnects the first signal from the gate, connects the drain to a voltage supply and connects the source to the output load, thereby causing the FET to operate in source-follower mode.