Image rejection mixer and multiband generator

Details Image rejection mixer and multiband generator Image rejection mixer and multiband generator

2004-09-22

2008-10-14

Starks, Jr., Wilbert L (Department: 2129)

Data processing: artificial intelligence

Miscellaneous

C330S301000

Reexamination Certificate

active

07437345

ABSTRACT:
The present invention suppresses a harmonic component without impairing the phase orthogonality of a pair of complex signals. A polyphase filter is configured so that K pieces of filter circuits, each of which comprises a resistor and a capacitor, are connected and +360/K degrees out of phase with a preceding one. Since counterclockwise rotation occurs when expression is given in terms of the complex plane, a notch occurs in a negative frequency region. A RC value is set so that a notch occurs in a specified frequency band to suppress a (4N+1)-order harmonic component. Since the polyphase filter has a symmetrical structure, an unbalanced component contained in an input signal is eliminated at a frequency that agrees with a pole determined by the RC value. This action improves the orthogonality.

REFERENCES:
patent: 6417737 (2002-07-01), Moloudi et al.
patent: 6608527 (2003-08-01), Moloudi et al.
patent: 6738601 (2004-05-01), Rofougaran et al.
patent: 6975838 (2005-12-01), Rofougaran et al.
patent: 7046979 (2006-05-01), Lee
patent: 2005/0075089 (2005-04-01), Iida

Affiliated with

Also associated with

Rating

Image rejection mixer and multiband generator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image rejection mixer and multiband generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image rejection mixer and multiband generator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4013682