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. 10, 2006
Filed:
Sep. 06, 2002
Didier Margairaz, Saratoga, CA (US);
Alain-serge Porret, Sunnyvale, CA (US);
Dominique Python, Sunnyvale, CA (US);
Pierre Favrat, Sunnyvale, CA (US);
Didier Margairaz, Saratoga, CA (US);
Alain-Serge Porret, Sunnyvale, CA (US);
Dominique Python, Sunnyvale, CA (US);
Pierre Favrat, Sunnyvale, CA (US);
Xceive Corporation, Santa Clara, CA (US);
Abstract
An image rejection mixer includes an input terminal for receiving an input radio frequency (RF) signal, a mode selector coupled to the input terminal generating an output signal for either high side mixing or low side mixing, a first mixer coupled to receive the input RF signal and a signal from a local oscillator providing a signal having a local oscillator frequency, a phase converter coupled to convert the phase of the signal from the local oscillator, a second mixer coupled to receive the output signal from the mode selector and the phase-converted local oscillator signal, and a tunable polyphase filter coupled to receive output signals from the first mixer and the second mixer, the tunable polyphase filter providing an output signal having a variable intermediate frequency. In one embodiment, the variable intermediate frequency the tunable polyphase filter is implemented as a switchable intermediate frequency.