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:
Apr. 12, 2005
Filed:
Apr. 22, 2003
Steven R. Lesage, Hillsboro, OR (US);
Stephen P. Bachhuber, Blacksburg, VA (US);
Thomas R. Apel, Portland, OR (US);
Steven R. LeSage, Hillsboro, OR (US);
Stephen P. Bachhuber, Blacksburg, VA (US);
Thomas R. Apel, Portland, OR (US);
Triquint Semiconductor, Inc., Hillsboro, OR (US);
Abstract
A bias control circuit generates a bias control current that is proportional to temperature. The bias control current is drawn from a first node of a bias circuit. The first node of the bias circuit is also configured to receive a relatively large first current that is also proportional to temperature. A bias current is also drawn from the first node, wherein the bias current is equal to the difference between the relatively large first current and the bias control current. The temperature sensitivities of the bias control current and the relatively large first current are matched, such that the bias control current is relatively insensitive to changes in temperature.