Local oscillator with non-harmonic ratio between oscillator...

Details Local oscillator with non-harmonic ratio between oscillator... Local oscillator with non-harmonic ratio between oscillator...

2007-08-24

2010-10-05

Anderson, Matthew D (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

C455S183100, C455S260000, C455S255000, C455S552100, C331S057000, C331S037000, C331S018000, C331S025000, C331S034000, C331S016000, C331S040000, C331S038000, C331S039000, C331S042000, C327S156000, C327S158000, C327S159000, C708S270000, C708S273000, C708S275000, C708S277000, C341S143000

Reexamination Certificate

active

07809338

ABSTRACT:
A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. An input baseband signal is interpolated and upconverted in the digital domain to an IF. The LO operates at a frequency which is a n/m division of the target RF frequency fRF. The IF frequency is configured to ½ of the LO frequency. The upconverted IF signal is then converted to the analog domain via digital power amplifiers followed by voltage combiners. The output of the combiners is band pass filtered to extract the desired replica.

REFERENCES:
patent: 6404293 (2002-06-01), Darabi et al.
patent: 6809598 (2004-10-01), Staszewski et al.
patent: 6850749 (2005-02-01), Soorapanth et al.
patent: 7130603 (2006-10-01), Futamura et al.
patent: 7502595 (2009-03-01), Futamura et al.
patent: 2004/0192240 (2004-09-01), Futamura et al.
patent: 2006/0033582 (2006-02-01), Staszewski et al.
patent: 2006/0038710 (2006-02-01), Staszewski et al.
patent: 2006/0276142 (2006-12-01), Futamura et al.
patent: 2008/0055008 (2008-03-01), Staszewski et al.

Affiliated with

Also associated with

Rating

Local oscillator with non-harmonic ratio between oscillator... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Local oscillator with non-harmonic ratio between oscillator..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local oscillator with non-harmonic ratio between oscillator... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4215182