Sigma-delta analog-to-digital converter (ADC) with feedback comp

Details Sigma-delta analog-to-digital converter (ADC) with feedback comp Sigma-delta analog-to-digital converter (ADC) with feedback comp

1993-12-13

1995-10-24

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341155, H03M 112

Patent

active

054613817

ABSTRACT:
A sigma-delta analog-to-digital converter (ADC) (80) includes first (81) and second (82) integrators, a quantizer (83) connected to an output of the second integrator (82), and a feedback circuit (84) connected to the output of the quantizer (83). In order to avoid the effects of delays through actual circuit elements, the feedback circuit (84) keeps the feedback signal to the first integrator (81) in a high-impedance state until the quantizer (83) resolves the output of the second integrator (82). Thus, the first integrator (81) avoids temporarily summing a possibly incorrect feedback signal. In addition, the feedback circuit (84) also keeps the first integrator (81) from integrating a sum of an input signal and the feedback signal until the feedback signal is driven to its correct state in response to the output of the quantizer (83). To accomplish these results, the feedback circuit (84) includes a compensation circuit (151) for continually determining when the quantizer (83) resolves.

REFERENCES:
patent: 4772871 (1988-09-01), Suzuki et al.
Ritoniemi, et al.; "Fully Differential CMOS Sigma-Delta Modul for High Perform.Analog-To-Dig. Conv. with 5 V Oper. Voltage;" Reprint. from IEEE Proc. ISCAS'88; pp. 353-358, (1988).
Norsworthy, et al.; "A 14-bit 80-kHz Sigma-Delta A/D Converter: Model., Design, and Perform. Evaluation;" IEEE J. Solid-St. Cir.; pp. 342-352, (1989).

Affiliated with

Also associated with

Rating

Sigma-delta analog-to-digital converter (ADC) with feedback comp does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1889548