A generalized approach to design CT ΣΔMs based on FIR DAC

نویسندگان

  • Ahmed Ashry
  • Hassan Aboushady
چکیده

Abstract— In this paper, a generic and simple approach to design Continuous-Time Sigma-Delta Modulators (CT ƩΔMs) based on Finite Impulse Response Digital-to-Analog Converter (FIR DAC) is introduced. The numerical conversion from Continuous-Time to Discrete-Time allows the designer to explore complex modulator architectures and different feedback DAC shapes, without dealing with difficult equations needed in other published design approaches.

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

Jitter analysis of bandpass continuous-time ΣΔMs for different feedback DAC shapes

In this paper, a simple and intuitive technique for analyzing clock jitter effect on bandpass Continuous-Time SigmaDelta (Σ∆) modulators is introduced. The power spectral density of the jitter noise for different feedback DAC shapes are derived and compared. It is shown that DAC output signal shapes used to reduce clock jitter sensitivity in lowpass Continuous-Time Σ∆ modulators may not be suit...

متن کامل

On the Design of Near-Perfect-Reconstruction IIR QMF Banks Using FIR Phase-Compensation Filters

In this paper we describe a novel approach for the design of near-perfect-reconstruction mixed FIR/ allpass-based quadrature mirror filter banks. The design is carried out in the polyphase domain, where FIR filters, obtained via simple closed-form expressions, are employed for compensating the non-linear phase introduced by the allpass filters. Starting from a generalized two-band structure, we...

متن کامل

Design of an Wide-band FIR filter with Sharp Transition using Generalized Sampling Kernels

This paper proposes a new design of a computationally efficient FIR filters with wide passband and sharp transition, where generalized sampling kernels are introduced and utilized along with the IFIR filter structure. In particular, the proposed filter design approach provides a closed-form solution for filter coefficients, yielding a practical design procedure for linear-phase sharp FIR digita...

متن کامل

Resonation-based Hybrid Continuous-Time/Discrete-Time Cascade ΣΔ Modulators − Application to 4G Wireless Telecom

This paper presents innovative architectures of hybrid Continuous-Time/Discrete-Time (CT/DT) cascade ΣΔ Modulators (ΣΔMs) made up of a front-end CT stage and a back-end DT stage. In addition to increasing the digitized signal bandwidth as compared to conventional ΣΔMs, the proposed topologies take advantage of the CT nature of the front-end ΣΔM stage, by embedding anti-aliasing filtering as wel...

متن کامل

15.3 A 115dB-DR audio DAC with -61dBFS out-of-band noise

Out-of-band noise (OBN) is troublesome in analog circuits that process the output of a noise-shaping audio DAC. It causes slewing in amplifiers and aliasing in sampling circuits like ADCs and class-D amplifiers. Non-linearity in these circuits also causes cross-modulation of the OBN into the audio band. These mechanisms lead to a higher noise level and more distortion in the audio band. OBN als...

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 2010