نتایج جستجو برای: delta modulation
تعداد نتایج: 201516 فیلتر نتایج به سال:
An interface for MEMS gyroscope is implemented in 0.18μm HVCMOS technology, and achieves a low noise floor of 1m°/sec/ Hz over 200Hz BW. Electromechanical forcefeedback and self-clocking scheme based on gyro resonance are implemented. The interface includes on-chip reference generation, decimation, and temperature compensation. Keywords-gyroscopes; Sigma delta modulation; Force feedback; Self-c...
چکیده ندارد.
Sigma–delta modulation, a widely used method of analog-to-digital (A/D) signal conversion, is known to be robust to hardware imperfections, i.e., bit streams generated by slightly imprecise hardware components can be decoded comparably well. We formulate a model for robustness and give a rigorous analysis for single-loop sigma–delta modulation applied to constant signals (dc inputs) for time cy...
DSD is a 1-bit coding scheme based upon sigma-delta modulation. In the commercial realization of this technology exploiting DVD optical disc storage, six discrete channels are accommodated each with a constant bit rate of 2.8224 Mb/s, a specification that cannot be changed within the context of the SACD release format. However, a method of embedding additional data in the DSD bitstream is shown...
This paper presents a design and analysis of electromechanical sigma-delta modulator for MEMS gyroscope, which enables us to control the proof mass and to obtain an exact digital output without additional A/D conversion. The system structure and the circuit realization of the sigma-delta modulation are simpler than those of the analog sensing and feedback circuit. Based on the electrical sigma-...
As process technology has progressed to nanometric scale transistors gate length, faults regarding effects due to electromagnetic interference, free ions and particles have increased. Efforts to reduce this susceptibility were made in many works, as critical systems can have their functions severely affected. This work presents the use of digital sigma-delta modulation to cope with fault occurr...
The harmonic currents generated by the modern power supply equipment cause power system heating and also add to user power bills. Personal computers are the major equipments which use the modern power supply ie switched mode power supply (SMPS).These SMPS draw non-sinusoidal currents from the supply which results in generation of harmonics. Power quality of the distribution network is been dist...
High-resolution digital audio systems currently embrace two forms of encoding. DVD-audio uses multi-level linear pulse code modulation (LPCM) while Super-Audio CD (SACD) uses sigma-delta modulation (SDM) in a scheme designated by Sony as direct stream digital (DSD) [1]. Debate has centred on their relative merits [2-7] where high-frequency quantization noise and the effectiveness of dither have...
Several analog-to-digital conversion methods for bandlimited signals used in applications, such as Σ∆ quantization schemes, employ coarse quantization coupled with oversampling. The standard mathematical model for the error accrued from such methods measures the performance of a given scheme by the rate at which the associated reconstruction error decays as a function of the oversampling ratio ...
The concomitant activation of spinal kappa- and delta-opioid systems is a prerequisite for the antinociception of gestation and its hormonal simulation [via 17 beta-estradiol and progesterone administration; hormone-simulated pregnancy (HSP)]. However, it is not known whether the release of kappa- and delta-opioids is also concomitantly regulated. This study investigates whether the release of ...
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