Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1996-05-20
1997-10-28
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
H03M 302
Patent
active
056821611
ABSTRACT:
A delta-sigma modulator includes, in one embodiment, cascaded unit-delay integrators, the number of which is selected depending upon the order desired. The modulator further includes an n-bit (or multi-bit) A/D converter coupled to the output of the last cascaded integrator, and an n-bit (or multi-bit) D/A converter coupled to the output of the A/D converter. A truncator also is coupled to the output of the A/D converter. Truncation error correction is performed digitally by a truncation corrector. A one-bit D/A converter provides feedback from the output of the truncator to differential summing junctions interposed at the input of each unit-delay integrator. The multi-bit D/A converter output signal is fed back to differential summing junctions at the input of the third order and higher unit-delay integrators. The multi-bit D/A converter requires no digital correction of its linearity and only unit-delay integrators are used so that N-1 delay free integrators do not all have to settle within one clock period. The modulator therefore utilizes multiple quantizer bits to provide increased converter resolution and is stable at high orders.
REFERENCES:
patent: 5065157 (1991-11-01), Ribner et al.
patent: 5103229 (1992-04-01), Ribner
patent: 5117234 (1992-05-01), Shizawa
patent: 5124703 (1992-06-01), Kaneaki et al.
patent: 5142286 (1992-08-01), Ribner et al.
patent: 5148166 (1992-09-01), Ribner
patent: 5181032 (1993-01-01), Ribner
patent: 5187482 (1993-02-01), Tiemann et al.
patent: 5283578 (1994-02-01), Ribner et al.
patent: 5563535 (1996-10-01), Corry et al.
Hoe David Henry Kenneth
Ribner David Byrd
General Electric Company
Snyder Marvin
Young Brian K.
LandOfFree
High-order delta sigma 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 High-order delta sigma modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-order delta sigma modulator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1028787