A Hardware Realization of an Exponentially Adaptive Delta Modulator
نویسندگان
چکیده
منابع مشابه
Stability and Performance Analysis of an Adaptive Sigma–Delta Modulator
This work develops an adaptive sigma–delta modulator that is based on adapting the quantizer step-size using estimates of the quantizer input rather than the modulator input. The adaptive modulator with a first-order noise shaping filter is shown to be bounded-input bounded-output stable. Moreover, an analytical expression for the signal-to-noise ratio is derived, and it is shown to be independ...
متن کاملSNR performance of an adaptive sigma delta modulator
In a previous study [1], we proposed an adaptive sigma delta modulator with improved dynamic range. The modulator adapts the step size of the quantizer from estimates of the quantizer input instead of the modulator input. In this study, we conduct an error variance analysis of the new modulator and derive expression for the SNR. The derived expression shows that the SNR is independent of the in...
متن کاملDesign and VLSI Implementation of an Adaptive Delta-Sigma Modulator
The quality and stability of noise shaping is a concern in the design of higher-order delta-sigma modulators for high-resolution, high-speed oversampled analog-to-digital conversion. We reformulate noise-shaping modulation alternatively as a nonlinear optimal control problem, where the objective is to find the binary modulation sequence that minimizes signal swing in a cascade of integrators op...
متن کاملA Simple Adaptive Sigma Delta Modulator for Software Defined Radio
In this paper we propose a simple and flexible design of analog-to-digital converter based on a single adaptable architecture of high order single loop sigma delta modulator suitable for multimode operation and adaptive wireless systems. The modulator is adaptable to operate in different signal bandwidth and signal-to-noise ratio (SNR) by varying the feedback gain values of local resonators and...
متن کاملAnalysis and simulation of a cascaded delta delta–sigma modulator
This paper analyses and simulates a delta delta–sigma modulator, the cascade combination of a delta modulator and a delta–sigma modulator. Using prediction, the delta modulator reduces the dynamic range of a signal prior to quantisation. Using noise shaping, the delta–sigma modulator cancels the error of the delta modulator. Performance is evaluated with input signals from a random noise proces...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1971
ISSN: 0001-4966
DOI: 10.1121/1.1977468