A novel highly stable high-resolution oversampled Σ-Δ A/D converter configuration

نویسندگان

  • Neil A. Fraser
  • Behrouz Nowrouzian
چکیده

Feedforward and multiple-feedback A/D converters offer high-resolution, but are susceptible to instability in the presence of capacitor tolerances in a corresponding switchedcapacitor (SC) hardware implementation. The hitherto A/D converters are usually based on, a) complementary signal and noise transfer functions, and/or b) unitcircle noise transfer function zeros. This paper is concerned with the development of a novel A/D converter having, instead, magnitude-squared or magnitude complementary signal and noise transfer functions. The proposed A/D converter exhibits resolution and dynamic range properties similar to those of the existing feedforward and multiplefeedback A/D converters, but o ers increased stability performance in the presence of capacitor tolerances in the SC hardware implementation. In addition, the SC hardware implementation of the resulting A/D converter leads to a capacitance spread which is comparable to that of hitherto A/D converters.

برای دانلود 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

A Delta-Sigma beamformer with integrated apodization

This paper presents a new design of a discrete time Delta-Sigma (∆Σ) oversampled ultrasound beamformer which integrates individual channel apodization by means of variable feedback voltage in the Delta-Sigma analog to digital (A/D) converters. The output bit-width of each oversampled A/D converter remains the same as in an unmodified one. The outputs of all receiving channels are delayed and su...

متن کامل

Wide-band high-resolution Σ∆ A/D converter

Wireless base station and VDSL transceiver require A/D converter with signal bandwidth more than 10MHz and resolution in the range of 12-14bits. Continuous-time Σ∆ A/D converter has the advantage of possible high signal bandwidth as well as low power consumption compared with discrete time counterpart. In this project, our target is to design a 12MHz-signal bandwidth continuous time Σ∆ A/D conv...

متن کامل

10.7MHz Bandpass Delta-Sigma A/D Modulators

There is industrial interest in A/D conversion at the intermediate-frequency (IF) stage of a radio [1], because that allows demodulation and IF filtering to be done digitally. The robustness of the digital circuitry gives manufacturing advantages and allows the use of sophisticated algorithms, which are especially useful with digitally coded transmissions. A/D conversion can be done in quadratu...

متن کامل

High-Performance Data Converters

Novel techniques for multi-bit oversampled data conversion are described. State-of-the-art oversampled data converters are analyzed, leading to the conclusion that their performance is limited mainly by low-resolution signal representation. To increase the resolution, high-performance, high-resolution internal D/A converters are required. Unit-element mismatch-shaping D/A converters are analyze...

متن کامل

Correlation of Transfer Function Implementation on Delta-Sigma Modulator Stability Analysis

Higher order delta-sigma (∆Σ) modulator with one bit quantizer is known as one of the easiest method to gain a high resolution A/D converter without the need of accurately matched components. However, stability of higher order ∆Σ modulator is still a problem during the design and implementation process. Stabilizing higher order modulator requires the proper choice of integrator gains. In this p...

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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2001