Understanding Amplitude Quantization Error for ADCs
2019年4月17日 · This article examines the quantization error of an analog-to-digital converter. An ADC transforms an input value into one of the values from a set of discrete levels and outputs a digital code to specify the quantization level. The quantization process introduces some …
Quantization (signal processing) - Wikipedia
An analog-to-digital converter (ADC) can be modeled as two processes: sampling and quantization. Sampling converts a time-varying voltage signal into a discrete-time signal, a sequence of real numbers. Quantization replaces each real number with an approximation from a finite set of discrete values.
Chapter 20: Analog to Digital Conversion [Analog Devices Wiki]
An ADC carries out two processes, sampling and quantization. The ADC represents an analog signal, which has infinite resolution, as a digital code that has finite resolution. The ADC produces 2N digital values where N represents the number of binary output bits.
Quantization Noise and Amplitude Quantization Error in ADCs
2019年4月22日 · Learn the methods and applications of modeling the quantization error of an ADC using a noise source.
Fundamental Concepts: Sampling, Quantization, and Encoding
Quantization A continuous set of values (like voltage levels) is quantized into a discrete set of values. During the analog-to-digital conversion process, each sampled value is matched with the closest value among a limited number of discrete levels.
This tutorial first derives the theoretical quantization noise of an N-bit analog-to-digital converter (ADC). Once the rms quantization noise voltage is known, the theoretical signal-to-noise ratio (SNR) is computed. The effects of oversampling on the SNR are also analyzed.
Understanding AC Behaviors of High Speed ADCs - Analog
2019年1月1日 · Quantization. All ADCs take input signals that are continuous in time and amplitude and output quantized discrete-time samples. The ADCs’ dual functions—quantization and sampling—provide an efficient transformation from the analog to the digital signal domain, but each has consequences with regard to the converters’ ac performance.
How Quantization and Thermal Noise Determine an ADC's ... - Analog
When using a Nyquist analog-to-digital converter (ADC) in a sampling or sub-sampling receiver application, an RF designer needs to know the ADC's effective noise figure, in order to perform determine the cascaded noise figure for the complete receiver line-up.
Quantization step dispersion of direct transformation ADC
Defining of a quantization level dispersion for direct transformation ADC is considered in the article. The value of this quantity allows estimating the quantization noise value that arises because of ADC characteristics nonlinearity, value of INL and DNL.
High-Speed ADC Quantization with Overlapping Metastability …
Simulation results of a 2GS/s 6b flash ADC with the proposed quantization method in 0.13 μ m CMOS show 25%-50% improvement in ADC bandwidth, while using about half the power compared with flash ADCs of the same resolution and in the same technologies.