Exact frequency translation using dual cascaded sigma-delta...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C327S147000, C327S105000

Reexamination Certificate

active

07924072

ABSTRACT:
A PLL-based frequency translator provides a divider augmented with a sigma delta modulator (SDM) in a reference path. The system may include two primary functional blocks—an input PLL with its reference path containing an integer divider coupled with a SDM (a fractional frequency divider), and an output PLL with its feedback path containing an integer divider coupled with a SDM (a fractional frequency multiplier). The combination of an integer divider and an SDM yields a fractional divider that divides by N+F/M, where N is the integer portion of the division and F/M is the fractional portion of the division, with M denoting the fractional modulus. Furthermore, since it is desirable to have programmable division factors, it is beneficial to define N, F and M as integers as this simplifies a programming interface when the frequency translator is manufactured as an integrated circuit.

REFERENCES:
patent: 4868513 (1989-09-01), Piercy et al.
patent: 5038117 (1991-08-01), Miller
patent: 5079521 (1992-01-01), Gaskell et al.
patent: 5786778 (1998-07-01), Adams et al.
patent: 6008704 (1999-12-01), Opsahl et al.
patent: 6249189 (2001-06-01), Wu et al.
patent: 6333678 (2001-12-01), Brown et al.
patent: 6690215 (2004-02-01), McCune et al.
patent: 7058010 (2006-06-01), Chidambaran et al.
patent: 7148753 (2006-12-01), Garlepp et al.
patent: RE40424 (2008-07-01), Han et al.
patent: 7405628 (2008-07-01), Hulfachor et al.
patent: 7415092 (2008-08-01), Itri
patent: 7457388 (2008-11-01), Van Den Berg
patent: 7656791 (2010-02-01), Mok et al.
patent: 2002/0141344 (2002-10-01), Chidambaran et al.
patent: 2003/0067405 (2003-04-01), Keaveney et al.
patent: 2003/0119466 (2003-06-01), Goldman
patent: 2003/0227301 (2003-12-01), Lee
patent: 2004/0036509 (2004-02-01), Smith
patent: 2005/0046491 (2005-03-01), Smith
patent: 2005/0149775 (2005-07-01), Van Den Berg
patent: 2005/0213697 (2005-09-01), Adachi et al.
patent: 2006/0139081 (2006-06-01), Van Den Berg
patent: 2007/0024382 (2007-02-01), Zachan et al.
patent: 2008/0143397 (2008-06-01), Xia
patent: 2008/0238498 (2008-10-01), Lam et al.
patent: 2008/0246521 (2008-10-01), Feng
patent: 2009/0174492 (2009-07-01), Zhang
patent: 2009/0195275 (2009-08-01), Friedman et al.
patent: 2009/0256601 (2009-10-01), Zhang et al.
patent: 2010/0091688 (2010-04-01), Staszewski
patent: 1467488 (2004-10-01), None
PCT International Search Report for PCT/US2009/064141 mailed on Jan. 25, 2010.
PCT International Search Report for PCT/US2009/064178 mailed on Jan. 21, 2010.

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

Exact frequency translation using dual cascaded sigma-delta... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exact frequency translation using dual cascaded sigma-delta..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exact frequency translation using dual cascaded sigma-delta... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2700444

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