Digital Estimation and Correction of DAC Errors in Multibit ADCs

نویسندگان

  • X. Wang
  • P. Kiss
  • U. Moon
  • G. C. Temes
چکیده

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.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Multibit Adc with Mixed-mode Dac Error Correction

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.

متن کامل

High-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 کامل

Digital compensation of DAC mismatches in multibit delta-sigma ADCs

A digital compensation technique to overcome the effects of the digital-to-analogue converter (DAC)’s mismatches in multibit deltasigma modulators is described. The technique is purely digital, does not require the injection of a pilot signal and is compatible with binary-weighted element DACs. Simulation results confirm the validity of the compensation technique for a four-bit, fifth-order low...

متن کامل

Efficient determination of feedback DAC errors for digital correction in ΔΣ A/D converters

Feedback DAC errors in a ∆Σ analog to digital converter are determined by measuring the idle channel output and removing the DAC elements one by one. This method requires simple computation, does not add excess loop delay, and requires no reconfiguration of the ∆Σ modulator. The errors so determined can be used to correct the output codes in the digital domain or the DAC elements in the analog ...

متن کامل

A Digital Background Correction for Dac Nonlinearities in Lowpass and Bandpass Delta-sigma Modulators - Theory and Implementation

In this paper we review a background digital DAC linearization technique for Delta-Sigma analog-to-digital converters (∆Σ ADCs). A description of the theory behind this technique, details on a modulator implementation, measurement results, and finally an outlook for enhancing this technique for bandpass ∆Σ ADCs is provided. The technique has been successfully implemented in hardware and we here...

متن کامل

ذخیره 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