Accurate Self Characterization and Correction of A/D Converter Performance
نویسندگان
چکیده
* This work was supported, in part, by Texas Instruments Inc., Rocketchips Inc, and the R. J. Carver trust. Abstract A new algorithm based on a code density test to measure Integral Non-linearity (INL) of Analog-to-Digital (A/D) converters is introduced. This algorithm uses as an input two related but unknown ‘ramp-like’ signals that can be practically generated on-chip and the corresponding codedensity histogram. The algorithm inherently characterizes both the A/D converter and the inconsequential input. This algorithm finds applications in Self-calibrating A/D converters as well as providing capability for Built-In SelfTest, where generation of an on-chip ramp input test signal of 8bits accuracy or more is a challenge.
منابع مشابه
Modified Bi-directional AC/DC Power Converter with Power Factor Correction
Most existing power converters and industrial motor drive systems draw non-sinusoidal currents from the supply. Non-sinusoidal currents contained harm harmonics disturb the power supply which it causes serious concern for reliability. Other equipments that use the same power supply are adversely affected. This paper suggests the operation and performance of a new modified AC/DC converter that ...
متن کاملAccurate Prediction of Analog-to-digital Converter Performance after Post-correction
Analog-to-digital converter additive postcorrection using look-up-tables is considered. An accurate expression is provided that predicts the ADC performance after correction. The expression depends on differential nonlinearity, random noise variance, and the numerical precision of the correction terms. The theory shows good agreement when compared with simulations and experimental converter dat...
متن کاملBeta Expansions: a New Approach to Digitally Corrected A/d Conversion
We introduce a new architecture for pipelined (and also algorithmic) A/D converters that give exponentially accurate conversion using inaccurate comparators. An error analysis of a sigma-delta converter with an imperfect comparator and a constant input reveals a self-correction property that is not inherited by the successive refinement quantization algorithm that underlies both pipelined multi...
متن کاملAn Improved Control Method Based on Modified Delta-Sigma Modulator for Buck Converter
This paper proposes an improved control method based on modified Delta-Sigma Modulator (DSM) to enhance transient response and improve harmonic contents of buck DC-DC converter. The main advantages of the proposed method are improving the output voltage frequency spectrum, correction of the output voltage harmonic contents and sideband harmonics, reduction of switching noise peaks at the output...
متن کاملOn the optimal correction of inconsistent matrix equations $AX = B$ and $XC = D$ with orthogonal constraint
This work focuses on the correction of both the coecient and the right hand side matrices of the inconsistent matrix equations $AX = B$ and $XC = D$ with orthogonal constraint. By optimal correction approach, a general representation of the orthogonal solution is obtained. This method is tested on two examples to show that the optimal correction is eective and highly accurate.
متن کامل