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:
Jan. 05, 2010
Filed:
Nov. 30, 2006
Adrian Maxim, Austin, TX (US);
Charles D. Thompson, Buda, TX (US);
Mitchell Reid, Austin, TX (US);
Silicon Laboratories, Inc., Austin, TX (US);
Abstract
A receiver () includes a first mixing digital-to-analog converter (DAC) (), a second mixing DAC (), a direct digital frequency synthesizer (DDFS) (), a phase correction circuit (), a selectable load () and a magnitude correction circuit (). The first mixing DAC () includes a first input for receiving an input signal, a second input for receiving a digital first local oscillator (LO) signal and an output. The second mixing DAC () includes a first input for receiving the input signal, a second input for receiving a digital second local oscillator (LO) signal and an output. The DDFS () is configured to provide the first and second LO signals, which are quadrature signals. The phase correction circuit () is configured to provide a phase correction signal to a control input of the DDFS (). The first selectable load () includes an input coupled to the output of the first mixing DAC () and a control input. The magnitude correction circuit () is configured to provide a first magnitude correction signal to the control input of the first selectable load ().