Multibit Adc with Mixed-mode Dac Error Correction
نویسندگان
چکیده
A mixed-mode error correction scheme is described for multibit ADCs with resistor-string and switched-capacitor DACs. The correction circuit uses a simple calibration ADC and digital filtering. It operates in the background and remains effective even for very low oversampling ratios.
منابع مشابه
Digital Estimation and Correction of DAC Errors in Multibit ADCs
An adaptive digital algorithm is described for acquiring and correcting the errors of the feedback DAC used in a multibit ADC. The method is highly accurate, and is particularly useful for wideband ADCs, where mismatch error shaping becomes ineffective.
متن کاملHigh-Speed Multibit Delta-Sigma ADCs with On-Line Digital Error Correction
Multibit delta-sigma modulators are widely used in recent analog-to-digital converter (ADC) implementations [1, Chapter 8]. Due to their improved stability, they can achieve the same high signal-to-noise ratio (SNR) with lower order modulator and lower oversampling ratio (OSR), i.e. higher speed, than their singlebit counterparts. Also, the use of a multibit feedback relaxes slew-rate and settl...
متن کاملHigh-Speed ADC with Error Correction
A digital error correction scheme is described for ADCs with multibit quantizers. It operates in the background and remains effective even for very low oversampling ratios.
متن کاملDual quantization continuous time ΣΔ modulators with spectrally shaped feedback
A new technique is proposed to eliminate the nonlinear error of a multibit digital-to-analog converter (DAC) used in a sigma-delta modulator where the solidity of multibit DAC against the clock jitter is reserved. By using dual quantization, this technique reduces the bit length of DAC to one bit and consequently eliminates its nonlinear error. A lowpass finite impulse response (FIR) filter wit...
متن کاملDigital Techniques for Improved AX Data Conversion
Two digital techniques are described in this tutorial, both aimed at improving the accuracy of delta-sigma data converters. The first one corrects adaptively for mismatch errors in a MASH ADC, while the other acquires and then corrects for the nonlinearity of the intemal multibit DAC used in the ADC.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001