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- Delta-sigma_modulation abstract "Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is a method for encoding analog signals into digital signals as found in an ADC. It is also used to transfer higher-resolution digital signals into lower-resolution digital signals as part of the process to convert digital signals into analog.In a conventional ADC, an analog signal is integrated, or sampled, with a sampling frequency and subsequently quantized in a multi-level quantizer into a digital signal. This process introduces quantization error noise. The first step in a delta-sigma modulation is delta modulation. In delta modulation the change in the signal (its delta) is encoded, rather than the absolute value. The result is a stream of pulses, as opposed to a stream of numbers as is the case with PCM. In delta-sigma modulation, the accuracy of the modulation is improved by passing the digital output through a 1-bit DAC and adding (sigma) the resulting analog signal to the input signal, thereby reducing the error introduced by the delta-modulation.This technique has found increasing use in modern electronic components such as converters, frequency synthesizers, switched-mode power supplies and motor controllers, primarily because of its cost efficiency and reduced circuit complexity.Both analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) can employ delta-sigma modulation. A delta-sigma ADC first encodes an analog signal using high-frequency delta-sigma modulation, and then applies a digital filter to form a higher-resolution but lower sample-frequency digital output. On the other hand, a delta-sigma DAC encodes a high-resolution digital input signal into a lower-resolution but higher sample-frequency signal that is mapped to voltages, and then smoothed with an analog filter. In both cases, the temporary use of a lower-resolution signal simplifies circuit design and improves efficiency.The coarsely-quantized output of a delta-sigma modulator is occasionally used directly in signal processing or as a representation for signal storage. For example, the Super Audio CD (SACD) stores the output of a delta-sigma modulator directly on a disk.".
- Delta-sigma_modulation wikiPageExternalLink CMOSedu.com.
- Delta-sigma_modulation wikiPageExternalLink MT-022.pdf.
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- Delta-sigma_modulation wikiPageWikiLink Accumulator_(computing).
- Delta-sigma_modulation wikiPageWikiLink Adder_(electronics).
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- Delta-sigma_modulation wikiPageWikiLink Class-D_amplifier.
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- Delta-sigma_modulation wikiPageWikiLink Delta_(letter).
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- Delta-sigma_modulation wikiPageWikiLink Dirac_delta_function.
- Delta-sigma_modulation wikiPageWikiLink Electronic_amplifier.
- Delta-sigma_modulation wikiPageWikiLink Flip-flop_(electronics).
- Delta-sigma_modulation wikiPageWikiLink Frequency_synthesizer.
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- Delta-sigma_modulation wikiPageWikiLink Integral.
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- Delta-sigma_modulation wikiPageWikiLink Motor_controller.
- Delta-sigma_modulation wikiPageWikiLink Noise_(electronics).
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- Delta-sigma_modulation wikiPageWikiLink Pulse-code_modulation.
- Delta-sigma_modulation wikiPageWikiLink Pulse-density_modulation.
- Delta-sigma_modulation wikiPageWikiLink Pulse-frequency_modulation.
- Delta-sigma_modulation wikiPageWikiLink Pulse-width_modulation.
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- Delta-sigma_modulation wikiPageWikiLink Quantization_(signal_processing).
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- Delta-sigma_modulation wikiPageWikiLink Root_mean_square.
- Delta-sigma_modulation wikiPageWikiLink Sigma.
- Delta-sigma_modulation wikiPageWikiLink Signal-to-noise_ratio.
- Delta-sigma_modulation wikiPageWikiLink Super_Audio_CD.
- Delta-sigma_modulation wikiPageWikiLink Switched-mode_power_supply.
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- Delta-sigma_modulation wikiPageWikiLink File:Fig._1b.svg.
- Delta-sigma_modulation wikiPageWikiLink File:Fig_1a._Effect_of_clocking_impulses.svg.
- Delta-sigma_modulation wikiPageWikiLink File:Fig_1c._ADC_waveforms.svg.
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- Delta-sigma_modulation wikiPageWikiLink File:Pulse-density_modulation_1_period.gif.
- Delta-sigma_modulation wikiPageWikiLinkText "Delta Modulation".
- Delta-sigma_modulation wikiPageWikiLinkText "Delta-Sigma".
- Delta-sigma_modulation wikiPageWikiLinkText "Delta-sigma modulation".
- Delta-sigma_modulation wikiPageWikiLinkText "Delta-sigma modulation#Decimation structures".
- Delta-sigma_modulation wikiPageWikiLinkText "Delta-sigma_modulation".
- Delta-sigma_modulation wikiPageWikiLinkText "Delta-sigma_modulation#Analog_to_digital_conversion".
- Delta-sigma_modulation wikiPageWikiLinkText "One-bit DACs".
- Delta-sigma_modulation wikiPageWikiLinkText "Sigma-Delta".
- Delta-sigma_modulation wikiPageWikiLinkText "Sigma-delta modulation".
- Delta-sigma_modulation wikiPageWikiLinkText "delta-sigma analog-to-digital converter".
- Delta-sigma_modulation wikiPageWikiLinkText "delta-sigma converter".
- Delta-sigma_modulation wikiPageWikiLinkText "delta-sigma modulated".
- Delta-sigma_modulation wikiPageWikiLinkText "delta-sigma modulation".
- Delta-sigma_modulation wikiPageWikiLinkText "delta-sigma modulator".
- Delta-sigma_modulation wikiPageWikiLinkText "delta-sigma".
- Delta-sigma_modulation wikiPageWikiLinkText "sigma-delta converters".
- Delta-sigma_modulation wikiPageWikiLinkText "sigma-delta modulation".
- Delta-sigma_modulation wikiPageWikiLinkText "sigma-delta".
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