Continuous-Time Delta-Sigma Modulator Model for A/D Conversion

نویسندگان

  • A. A. Mariano
  • D. Dallet
  • Y. Deval
  • J-B. Bégueret
چکیده

In this paper we present a study of a Continuous-Time Delta-Sigma Modulator (CT ∆ΣM) to be applied in radio communication systems, including a high-level modelization for simulation purposes. The conventional sample-and-hold and comparator blocks, very popular in CT ∆ΣM models, are replaced by an analog-to-digital converter (ADC), in order to allow the ADC modelization. In this way, we propose a model able to improve the performances of ADCs. This model is a useful tool to characterize data conversion systems.

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

Time-Mode Signal Quantization for Use in Sigma-Delta Modulators

The rapid scaling in modern CMOS technology has motivated the researchers to design new analog-to-digital converter (ADC) architectures that can properly work in lower supply voltage. An exchanging the data quantization procedure from the amplitude to the time domain, can be a promising alternative well adapt with the technology scaling. This paper is going to review the recent development in t...

متن کامل

Quadrature delta sigma modular design with adjustable bandwidth and center frequency

In this paper, a flexible Continuous time (CT) feedforward (FF) quadrature delta sigma modulator (QDSM) with variable bandwidth (BW) is proposed. The modulator BW and center frequency (fc) are variable which can be adjusted with two separate parameters. The modulator signal-to-noise ratio (SNR) will be optimized by these parameters at every center frequency and bandwidth. The modulator BW is ch...

متن کامل

A Parallel Digital Architecture for Delta-sigma Modulation

A major drawback of delta-sigma modulation is the high oversampling ratios required, especially for single-bit quantization. Accordingly, much of the research in the area has focused on lowering the sampling rate through various parallelization approaches. However, this research has been overwhelmingly concentrated on continuous and discrete-time analog modulator implementations for A/D convert...

متن کامل

An 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 کامل

VHDL-AMS Behavioral Modeling of High-Speed Continuous-Time Delta-Sigma Modulator

An advanced design methodology using a combination of behavioral models and transistor level models is presented in this paper. This methodology is very interesting for complex mixed-signal IC design, reducing the simulation time and improving the design flexibility. In order to validate the methodology proposed, a High-Speed Bandpass Continuous-Time Delta-Sigma Modulator is modeled. This modul...

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 2005