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:
Mar. 20, 2012
Filed:
Oct. 25, 2007
Fucheng Wang, San Jose, CA (US);
Chao-tung Yang, Hsinchu, TW;
Yi LU, Hsinchu, TW;
MStar Semiconductor, Inc., Hsinchu, TW;
Abstract
A television tuner employs a single down-conversion architecture to translate VHF/UHF TV signals to various standard IF frequencies. The television tuner includes a harmonic rejection and quadrature mixer and a quadrature mixer. The harmonic rejection and quadrature mixer mixes a first-band signal with a reference signal to output a first pair of in-phase and quadrature-phase signals with a harmonic-frequency component eliminated from the resulting signals. A quadrature mixer mixes a second-band signal with the reference signal to output a second pair of in-phase and quadrature-phase signals. A digital signal processing circuit coupled to both the harmonic rejection and quadrature mixer and the quadrature mixer for selectively processing either the first pair of in-phase and quadrature-phase signals or the second pair of in-phase and quadrature-phase signals to generate an output signal corresponding to a desired channel.