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:
Feb. 01, 2005
Filed:
Nov. 05, 2002
John Thomas Conteras, San Jose, CA (US);
Paul Wingshing Chung, San Jose, CA (US);
Stephen Alan Jove, Hollister, CA (US);
Kevin Roy Vannorsdel, San Jose, CA (US);
John Thomas Conteras, San Jose, CA (US);
Paul Wingshing Chung, San Jose, CA (US);
Stephen Alan Jove, Hollister, CA (US);
Kevin Roy Vannorsdel, San Jose, CA (US);
Abstract
A method and apparatus for providing quadrature biasing for coupled-pair circuits. A QBCP-circuit for quadrature amplifiers provides a new input common-mode sense point that separates the inputs for the differential-and-common mode feedback-control loops. The QBCP circuit biases all four transistors equivalently and reduces the feedback-loop interaction, thereby simplifying the bias control system and improves the voltage-transfer frequency-response performance.