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:
Dec. 17, 2002
Filed:
Mar. 26, 2001
Kevin Choi, Thousand Oaks, CA (US);
Skyworks Solutions, Inc., Newport Beach, CA (US);
Abstract
Power gain and quiescent current of a radio frequency (RF) transistor is controlled by a current draw-away circuit that diverts (“draws away”) a portion of the reference current from a reference transistor residing in an RF transistor bias circuit. When in the “off” state, the current draw-away circuit is not conductive. When in the “on” state, a transistor residing in the current draw-away circuit is conducting and draws a draw-away current, I , through a resistor. The magnitude of I is determined by the resistor. Other embodiments include a variable resistance that varies I , a variable current source (or variable voltage source) that varies I by adjusting the current (or voltage) applied to the control input of the transistor residing in the current draw-away circuit, and two or more current draw-away circuits individually controlled such that one or any combination of the current draw-away circuits varies I .