Delta-sigma analog-to-digital converter

Details Delta-sigma analog-to-digital converter Delta-sigma analog-to-digital converter

2011-02-22

2011-02-22

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07893855

ABSTRACT:
An exemplary continuous-time delta-sigma analog-to-digital converter includes a loop filter, a quantizer, a dynamic element matching circuit, a latch, and a digital-to-analog converter (DAC). The loop filter contains a plurality of integrators coupled in series, including a first integrator and a second integrator; a first positive feedback resistive element, placed in a first positive feedback path between a first output node of the second integrator and a first input node of the first integrator; and a first negative feedback resistive element, placed in a first negative feedback path between a second output node of the second integrator and a second input node of the first integrator. The quantizer is implemented using a domino quantizer. The DAC contains a plurality of DAC units each having a capacitive device, a resistive device, and a switch device coupled between the capacitive device and the resistive device.

REFERENCES:
patent: 4596978 (1986-06-01), Fujita
patent: 6346898 (2002-02-01), Melanson
patent: 6480134 (2002-11-01), Sasaki
patent: 6642873 (2003-11-01), Kuang
patent: 6975259 (2005-12-01), Jensen
patent: 7227491 (2007-06-01), Doerrer et al.
patent: 7298306 (2007-11-01), Melanson
patent: 7375666 (2008-05-01), Melanson
patent: 7616057 (2009-11-01), Sutardja
patent: 7688236 (2010-03-01), Di Giandomenico et al.
Yang, A 100mW 10MHz-BW CT Delta-Sigma Modulator with 87dB DR and 91dBc IMD, ISSCC Digest of Technical Papers, Feb. 2008.
Dorrer, A 3mW 74dB SNR 2MHz CT Delta-Sigma ADC with a Tracking-ADC-Quantizer in 0.13um CMOS, ISSCC Digest of Technical Papers, Feb. 2005.
Mitteregger, A 14b 20mW 640MHz CMOS CT Delta-Sigma ADC with 20MHz Signal BW and 12b ENOB , ISSCC Digest of Technical Papers, Feb. 2006.
van Veldhoven, A Tri-Mode Continuous-Time Sigma-Delta Modulator with Switched-Capacitor Feedback DAC for a GSM-EDGE/CDMA2000/UMTS Receiver , ISSCC Digest of Technical Papers, Feb. 2003.
Ouzounov, A 1.2V 121-Mode CT Delta-Sigma Modulator for Wireless Receivers in 90nm CMOS, ISSCC Digest of Technical Papers, Feb. 2007.
Ivanov, “Operational Amplifier Speed and Accuracy Improvement,” p. 52, figure 3-14, Kluwer Academic Publishers, Boston.

Affiliated with

Also associated with

Rating

Delta-sigma analog-to-digital converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2642703