Offset local oscillator without using frequency divider

Oscillators – Beat frequency

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C331S046000, C331S1170FE, C331S1170FE, C455S318000

Reexamination Certificate

active

11409886

ABSTRACT:
A local oscillator without a frequency divider is provided. The local oscillator includes a quadrature voltage controlled oscillator generating I and Q signals having a frequency which is one-third of a local oscillation frequency, and a differential second-harmonic signal having a frequency which is two-thirds of the local oscillation frequency, a poly-phase filter converting the differential second-harmonic signal input from the quadrature voltage controlled oscillator into I and Q signals, and a single side band (SSB) mixer receiving the I and Q signals having the frequency which is one-third of the local oscillation frequency from the quadrature voltage controlled oscillator as an input and receiving the I and Q signals having the frequency which is two-thirds of the local oscillation frequency from the poly-phase filter as an input, and outputting the I and Q signals having the local oscillation frequency.

REFERENCES:
patent: 6836180 (2004-12-01), Kwok
H. Darabi et al., A 2.4-GHz CMOS Transceiver for Bluetooth,IEEE Journal of Solid-State Circuits, (Dec. 2001), p. 2016-2024, vol. 36, No. 12.
P. Zhang et al., A 5-GHz Direct-Conversion CMOS Transceiver,IEEE Journal of Solid-State Circuits, (Dec. 2003), p. 2232-2238, vol. 38, No. 12.
L. Perraud et al., A Direct-Conversion CMOS Transceiver for the 802.11 a/b/g WLAN Standard Utilizing a Cartesian Feedback Transmitter,IEEE Journal of Solid-State Circuits, (Dec. 2004), p. 2226-2238, vol. 39, No. 12.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Offset local oscillator without using frequency divider does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Offset local oscillator without using frequency divider, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Offset local oscillator without using frequency divider will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3954872

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.