Bandpass sigma-delta modulator

Details Bandpass sigma-delta modulator Bandpass sigma-delta modulator

2006-04-25

2006-04-25

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C375S247000

Reexamination Certificate

active

07034727

ABSTRACT:
A bandpass sigma-delta modulator using acoustic resonators or micro-mechanical resonators. In order to improve resolution at high frequencies, acoustic resonators or micro-mechanical resonators are utilized in a sigma-delta modulator instead of electronic resonators. The quantized output is fed back using a pair of D/A converters to an input summation device. In fourth order devices, the feed back is to two summation devices in series. Such a sigma-delta modulator is usable in a software defined radio cellular telephone system and in other applications where high-frequency and high-resolution A/D conversion is required.

REFERENCES:
patent: 4577168 (1986-03-01), Hartmann
patent: 4754242 (1988-06-01), Okamura et al.
patent: 5283578 (1994-02-01), Ribner et al.
patent: 5392039 (1995-02-01), Thurston
patent: 5729230 (1998-03-01), Jensen et al.
patent: 5983719 (1999-11-01), Matthews et al.
patent: 6225928 (2001-05-01), Green
patent: 6271781 (2001-08-01), Pellon
patent: 6281652 (2001-08-01), Ryan et al.
patent: 6292121 (2001-09-01), Cake et al.
patent: 6346898 (2002-02-01), Melanson
patent: 6362764 (2002-03-01), Niimi et al.
patent: 6414615 (2002-07-01), Cheng
patent: 6462687 (2002-10-01), Eshraghi et al.
patent: 6473011 (2002-10-01), Steensgaard-Madsen
patent: 6587063 (2003-07-01), Su
patent: 6768435 (2004-07-01), Xu
patent: 6822592 (2004-11-01), Gandolfi et al.
patent: 6868288 (2005-03-01), Thompson
patent: 6885262 (2005-04-01), Nishimura et al.
patent: 6897796 (2005-05-01), Dias et al.
patent: 6943715 (2005-09-01), Radja et al.
patent: 6954159 (2005-10-01), Cooper et al.
patent: 0 740 411 (1996-10-01), None
patent: 2 823 619 (2002-10-01), None
patent: 2001298365 (2001-10-01), None
Waki-Kai Chen “Two-Port Synthesis by Ladder Development”, The Circuits and Fitters Handbook, vol. 72, no month (1995), pp. 2276-2291.

Affiliated with

Also associated with

Rating

Bandpass sigma-delta modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3544552