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. 06, 2007
Filed:
Mar. 29, 2004
Heng-chih Lin, Plano, TX (US);
Ranjit Gharpurey, Ann Arbor, MI (US);
Heng-Chih Lin, Plano, TX (US);
Ranjit Gharpurey, Ann Arbor, MI (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit provides a reduced harmonic content output signal OUTA and/or OUTB that is modulated according to an input signal. The circuit has an oscillator circuitand a harmonic rejection mixer (HRM). The oscillator circuitincludes at least one 'circuit portion' (FIG.A) configured to receive first and second orthogonal oscillator input signals (two of I, I−, Q, Q−) having respective first and second phases, and to provide an arbitrarily large number of oscillator output signals (φM) having respective mutually distinct phases that are interpolated between the first and second phases. Harmonic rejection mixeris configured to use the input signal to modulate a combination of the oscillator output signals, the oscillator output signals being respectively weighted so as to provide an emulated sinusoidal signal constituting the reduced harmonic content output signal.