The loop delay is reduced by predic... L Luh,J Choma,EE Engineer - Symposium on Vlsi 被引量: 0发表: 1998年 A new method to determine the period in sigma delta modulator with DC input Sigma delta modulator was used as A/D converter in many applications. By calculating 1-bit data ...
and a compensation section configured to compensate the ΔΣ modulator for a non-ideal characteristic caused by an internal loop delay, wherein the compensation section is a feedback path formed to start at the output node of the quantizer and end at the input node of the integrator immediately...
The sigma–delta modulator is a specific algorithm to convert low-bandwidth signals into a digital data stream. In the first section the effects of oversampling are described both for the analog-to-digital converter as well as for the analog-to-digital..
In particular, the anti-aliasing filter in a typical sigma delta converter is of very high order and has a latency, which includes delays in data transmission, of about 40 times the reciprocal of the cut-off frequency (Agnello, 1990), which compares with delay of about 0.5 times the ...
A technique to compensate for the harmful excess loop delay in a continuous time SigmaDelta analog-digital converter is presented. With no extra power cons... M Vadipour,C Chen,A Yazdi,... - IEEE Symposium on Vlsi Circuits 被引量: 57发表: 2008年 An 8-GHz continuous-time /spl Sigma/...
Delta-sigmaCalibrationDACA continuous-time delta-sigma A/D modulator providing 85 dB DR with 5 MS/s output rate in a 2.5V 0.25 渭m CMOS process is presented. The modulator has a single-stage, dual-loop architecture allowing nearly one clock period excess loop delay. A multi-bit quantizer ...
usingcontinuous-timeSigma-Deltamodulatorindetail. This paper discussedtheworkand gavecorrespondingsimulationand discussion, atlastalso put forwardrecommendationsforfurtherworkanddirections. Keywords:ultrasound imagingsystem;delay andsum beamformingalgorithm; ...
Besides, it also shows that both the gain ripple for inband signal and group delay variation are negligible, Hence, the leapfrog topologies can be used in ultra-high resolution signal processing system such as speech application, codec in digital cellular phone, and high precision measurement ...
The 4-bit DAC has two current outputs: one output is a non-return-to-zero (NRTZ) pulse (low clock jitter sensitivity) that connects to the input of the integrating loop filter and the other is a return-to-zero (RTZ) pulse (reduced delay improves loop stability) connected to the ...
In one embodiment, the delay blocks 1004 have a z−1 transform function in z-transform space. The delay block 1004-5 and the adder 1002-3 form a first differentiator. The delay block 1004-7 and the adder 1002-6 form a second differentiator. The MASH-111 delta-sigma modulator 1000 has...