DAC circuit with pseudo-return-to-zero scheme and DAC...

Details DAC circuit with pseudo-return-to-zero scheme and DAC... DAC circuit with pseudo-return-to-zero scheme and DAC...

2010-01-19

2011-10-04

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000

Reexamination Certificate

active

08031098

ABSTRACT:
In one embodiment, digital-to-analog converter (DAC) circuit includes dual DAC units employing pseudo-return-to-zero DAC operations to reduce inter-symbol interference. Moreover, each DAC unit is implemented using complementary MOS transistors to improve conversion performance. In another embodiment, a DAC calibration scheme performs background calibration of an array of DAC circuits in continuous time using a reference DAC circuit and a spare DAC circuit. Calibration (also referred to as “trimming”) of the DAC circuit using the calibration scheme of the present invention ensures that the DAC operates with high linearity over process variations. In one embodiment, the DAC circuit and the DAC calibration scheme are applied as the feedback DAC in a continuous-time sigma-delta (CT-ΣΔ) analog-to-digital converter to realize high performance and high precision analog-to-digital conversions.

REFERENCES:
patent: 5182559 (1993-01-01), Tokuyama
patent: 5355134 (1994-10-01), Kasuga et al.
patent: 5594443 (1997-01-01), Lam
patent: 6507304 (2003-01-01), Lorenz
patent: 6642867 (2003-11-01), Chowdhury et al.
patent: 6842132 (2005-01-01), Schafferer
patent: 2003/0043062 (2003-03-01), Dedic et al.
Analog Devices Data Sheet for “AD9734/AD9735/AD9736.” 10-/12-/14-Bit, 1200 MSPS DACS, © 2006 Analog Devices, Inc., 72 pages.
Analog Devices Data Sheet for “AD9776A/AD9778A/AD9779A,” Dual, 12-/14-/16-Bit, 1 GSPS, Digital-to-Analog Converters, © 2007-2008 Analog Devices, Inc., 56 pages.

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