Dithering is especially important when you''re working with lower bit depths, like 16-bit audio. Without dithering, 16-bit recordings can sound harsh and brittle, with audible distortion and noise shaping artifacts. But with proper dithering, even 16-bit recordings can sound surprisingly good. In fact, many classic albums from the 1980s and ...
With dithering, weights of most significant bit capacitors can be measured accurately, which relaxes matching requirement in capacitive DAC. In addition, the bypass window technique is used to detect whether the output voltage of the DAC is within a predefined small window, which determines whether to inject the dithering signal.
In this Letter, a dither-based background calibration with the DWA logic is proposed to correct capacitor mismatch and gain error in a pipeline-NS-SAR ADC. There is no detection of injecting the dithering signal in the calibration, leading to little analogue overhead and simple logic.
A dither-based calibration with DWA to correct capacitor mismatch and inter-stage gain error in pipeline-NS-SAR ADCs is proposed in this Letter, which requires no detection for the injection and adds little analogue overhead.
A novel dithering-based calibration technique to correct capacitor mismatch in digital-to-analogue converter (DAC) used in successive approximation register analogue-to-digital converters is proposed. With dithering, weights of most significant bit capacitors can be measured accurately, which relaxes matching requirement in capacitive DAC.
As Fig. 4 shows, dithering is the act of injecting a known but random amount of noise into the input of the ADC. Dither needs to be subtracted from the converter result, thereby avoiding dither leakage .
Dither is added to randomize the residue. The proposed calibration technique uses the capacitor array (C P d 0 − C P d 5 and C N d 0 - C N d 5) to inject dither and form different virtual thresholds during the normal SAR conversion. As Fig. 4 shows, dithering is the act of injecting a known but random amount of noise into the input of the ADC.
Dithering is especially important when you''re working with lower bit depths, like 16-bit audio. Without dithering, 16-bit recordings can sound harsh and brittle, with audible distortion and noise shaping artifacts. But with proper dithering, even 16-bit recordings can sound surprisingly good. In fact, many classic albums from the 1980s and ...
We propose a multi-level dither technique that can significantly enhance the ADC linearity. The injected dither also helps improve the linearity when the ADC handles an input signal with a small amplitude. Traditional dither injection leads to an increase in the amplifier output swing.
A novel dithering-based calibration technique to correct capacitor mismatch in digital-to-analogue converter (DAC) used in successive …
A novel dithering-based calibration technique to correct capacitor mismatch in digital-to-analogue converter (DAC) used in successive approximation register analogue-to-digital converters is proposed. With dithering, weights of most significant bit capacitors can be measured accurately, which relaxes matching requirement in ...
A dithering mode can improve the dynamic performance further. A prototype is fabricated in a 28nm CMOS technology. The measurement of the ADC with conversion rate of 180MS/s achieves an SFDR of 79.1dBc and an SNDR of 64.3dBc, with remarkable improvement after calibration and dither. Published in: 2019 IEEE International Symposium on Circuits and …
With dithering, weights of most significant bit (MSB) capacitors can be measured accurately so that very small capacitors can be used in the SAR ADC due to the relaxed matching requirement. A modified bit-cycling procedure is developed to avoid the code gaps caused by capacitor dithering. This calibration technique requires no analog ...
Abstract: A dither-based background calibration with data-weighted averaging logic to correct capacitor mismatch and inter-stage gain error in pipelined noise shaping …
A novel dithering-based calibration technique to correct capacitor mismatch in digital-to-analogue converter (DAC) used in successive approximation register analogue- to-digital converters is proposed and significantly improves capacitor matching without resorting to extensive computation or dedicated circuits.
Abstract: This paper proposes a deterministic dither based capacitor mismatch measurement using a low-resolution analog-to- digital converter for a wide range of Metal-Oxide-Metal capacitor values (20 fF to 1 pF), thereby facilitating easier integration alongside actual blocks which use those capacitors. In this work, deterministic dithering ...
We propose a multi-level dither technique that can significantly enhance the ADC linearity. The injected dither also helps improve the linearity when the ADC handles an input signal with a …
Since dithering calibration based on pseudorandom-code (PN code) has good performance for residue gain calibration in pipelined ADCs, we apply this technique in capacitor mismatch for …
The proposed calibration technique uses the capacitor array (C P d 0 − C P d 5 and C N d 0-C N d 5) to inject dither and form different virtual thresholds during the normal SAR conversion. As Fig. 4 shows, dithering is the act of injecting a known but random amount of …
The three most common split-MDAC structures are presented in Fig. 1. Fig. 1 (a) shows a structure which uses all the capacitors to sample input voltage (V in) requires a fractional-valued bridge capacitor to guarantee the value of any bit capacitor to be equal to the sum of all lower bit capacitors [11], [12], [13]. Fig. 1 (b) shows a structure which only uses the …
With dithering, weights of most significant bit capacitors can be measured accurately, which relaxes matching requirement in capacitive DAC. In addition, the bypass window technique is used to detect whether the output voltage of the DAC is within a predefined small window, which determines whether to inject the dithering signal. As a result ...
In this article, we''ll take a look at "dithering," which refers to a technique where an appropriate noise component is added to the signal to improve the performance of the A/D (analog-to-digital) conversion system. What is Dithering? Most EEs are familiar with methods of limiting noise levels in electronic circuits. Filtering is a common technique that can be applied …
The proposed calibration technique uses the capacitor array (C P d 0 − C P d 5 and C N d 0-C N d 5) to inject dither and form different virtual thresholds during the normal SAR conversion. As Fig. 4 shows, dithering is the act of injecting a known but random amount of noise into the input of the ADC.
Abstract: This paper proposes a deterministic dither based capacitor mismatch measurement using a low-resolution analog-to- digital converter for a wide range of Metal-Oxide-Metal …
Dither (ADC)。 Dither , ADC Dither , ADC ,,
Since dithering calibration based on pseudorandom-code (PN code) has good performance for residue gain calibration in pipelined ADCs, we apply this technique in capacitor mismatch for SAR ADCs. We propose a new structure for CDAC that greatly simplifies the calibration logic circuits with better calibration accuracy. Finally, we implement the ...
This paper proposes a deterministic dither based capacitor mismatch measurement using a low-resolution analog-to- digital converter for a wide range of Metal …
The capacitor mismatch in CDAC is becoming a severe problem limiting the performance of high resolution SAR ADCs. Currently, the calibration of capacitor mismatch includes Dithering Technology [1], Histograms Statistics [2], Metastability Detection [3], etc., which are all suffering complex algorithm, large hardware cost and much calibration deviation. Since dithering …
novel dithering-based calibration technique to correct capacitor mismatch in digital-to-analogue converter (DAC) used in successive approximation register analogue-to-digital converters is proposed. With dithering, weights of most significant bit capacitors can be measured accurately, which relaxes matching requirement in capacitive DAC.
A dither-based calibration with DWA to correct capacitor mismatch and inter-stage gain error in pipeline-NS-SAR ADCs is proposed in this Letter, which requires no detection for the injection and adds little analogue …
A dither-based calibration with DWA to correct capacitor mismatch and inter-stage gain error in pipeline-NS-SAR ADCs is proposed in this Letter, which requires no detection for the injection and adds little analogue overhead. The calibration is applied to a 10-bit pipeline-NS-SAR ADC with 0.3% capacitor mismatch and 1% gain errors ...
Abstract: A dither-based background calibration with data-weighted averaging logic to correct capacitor mismatch and inter-stage gain error in pipelined noise shaping successive approximation register ADCs is proposed. By injecting the dither signal in the background, the inter-stage gain is obtained. Besides, the data-weighted ...
As Fig. 4 shows, dithering is the act of injecting a known but random amount of noise into the input of the ADC. ... The mismatch for every capacitor is randomly generated in MATLAB and the values of the unit capacitors are taken to be Gaussian random variables with standard deviation of 1%. Capacitive parasitic elements are also taken into consideration to …
This paper proposes a deterministic dither based capacitor mismatch measurement using a low-resolution analog-to- digital converter for a wide range of Metal-Oxide-Metal capacitor values (20 fF to 1 pF), thereby facilitating easier integration alongside actual blocks which use those capacitors.
Zhou Y., Xu B., and Chiu Y.: ''A 12 bit 160 MS/s two-step SAR ADC with background bit-weight calibration using a time-domain proximity detector'', J. Solid-State Circuits, 2015, 50, (4), pp. 920–931 (10.1109/JSSC.2014.2384025)
Dither (ADC)。 Dither , ADC Dither , ADC , …
novel dithering-based calibration technique to correct capacitor mismatch in digital-to-analogue converter (DAC) used in successive approximation register analogue-to-digital converters is …
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