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:
Oct. 08, 2002
Filed:
Sep. 17, 1999
Ranjit Gharpurey, Garland, TX (US);
Texax Instruments Incorporated, Dallas, TX (US);
Abstract
A quadrature output oscillator device ( ) includes a first voltage controlled oscillator ( ) and a second voltage controlled oscillator (44). The second voltage controlled oscillator ( ) generates a first output (C) and a second output (D) to drive a first amplifier ( ). The second output (D) of the second voltage controlled oscillator ( ) is a quadrature-phase signal component output (Q) of the quadrature output oscillator device ( ). The first voltage controlled oscillator ( ) generates a first output (A) and a second output (B) to drive a second amplifier ( ). The second output (B) of the first voltage controlled oscillator ( ) is an in-phase signal component output (I) of the quadrature output oscillator device ( ). The first amplifier ( ) generates feedback signals for the first output (A) and the second output (B) of the first voltage controlled oscillator ( ). The second amplifier ( ) generates feedback signals for the first output (C) and the second output (D) of the second voltage controlled oscillator ( ). A gain adjust unit ( ) controls the gain for the first amplifier ( ) and the second amplifier ( ) such that the quadrature output oscillator device ( ) produces ideal in-phase (I) and quadrature-phase (Q) signal component outputs.