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Effective number of bits (ENOB) is a measure of the real dynamic range of an analog-to-digital converter (ADC), digital-to-analog converter (DAC), or associated circuitry. . Although the resolution of a converter may be specified by the number of bits used to represent the analog value, real circuits however are imperfect and introduce additional noise and distor
where M is the ADC's resolution in bits. [1] That is, one voltage interval is assigned in between two consecutive code levels. Example: Coding scheme as in figure 1; Full scale measurement range = 0 to 1 volt; ADC resolution is 3 bits: 2 3 = 8 quantization levels (codes) ADC voltage resolution, Q = 1 V / ( 2 3 - 1 ) = 0.143 V (intervals)
Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is an oversampling method for encoding signals into low bit depth digital signals at a very high sample-frequency as part of the process of delta-sigma analog-to-digital converters (ADCs) and digital-to-analog converters (DACs).
The following table is split into two groups based on whether it has a graphical visual interface or not. The latter requires a separate program to provide that feature, such as Qucs-S, [1] Oregano, [2] or a schematic design application that supports external simulators, such as KiCad or gEDA.
Differential non-linearity is a measure of the worst-case deviation from the ideal 1 LSB step. For example, a DAC with a 1.5 LSB output change for a 1 LSB digital code change exhibits 1⁄2 LSB differential non-linearity. Differential non-linearity may be expressed in fractional bits or as a percentage of full scale.
An integrating ADC is a type of analog-to-digital converter that converts an unknown input voltage into a digital representation through the use of an integrator. In its basic implementation, the dual-slope converter, the unknown input voltage is applied to the input of the integrator and allowed to ramp for a fixed time period (the run-up period).
The voltage on the capacitor v is directly proportional to the time interval T and can be measured with an analog-to-digital converter (ADC). The resolution of such a system is in the range of 1 to 10 ps. [12] Although a separate ADC can be used, the ADC step is often integrated into the interpolator.
The ADMS translator supports it for open-source simulators like Xyce and ngSPICE. A more complete implementation is now available through OpenVAF. The post-SPICE simulator Gnucap was designed in accordance with the standard document, and its support for Verilog-AMS for both the simulator level and the behavioral modeling is growing.