Buscar
Mostrando ítems 31-39 de 39
Ponencia
A 2.5-V CMOS Wideband Sigma-Delta Modulator
(Institute of Electrical and Electronics Engineers, 2003)
A high-performance Sigma-Delta modulator for wireline communication applications is presenfed It employs a 4th-order cascade multi-bit architecfure that requires only 16 oversampling ratio, and has been implemented using ...
Artículo
Multi-bit cascade ΣΔ modulator for high-speed A/D conversion with reduced sensitivity to DAC errors
(Institute of Electrical and Electronics Engineers, 1998)
This paper presents a ΣΔ modulator (ΣΔM) which combines single-bit and multi-bit quantization in a cascade architecture to obtain high resolution with low oversampling ratio. It is less sensitive to the non-linearity of ...
Capítulo de Libro
BandPass Sigma-Delta Analog-to-Digital Converters
(Springer, 2003)
The principle of ΣΔ Modulation (ΣΔM) is extended in BPΣΔMs to bandpass signals, especially but not only, with a narrow bandwidth. Thus, BPΣΔMs have much in common with their lowpass counterparts - whose properties have ...
Ponencia
Non-ideal quantization noise shaping in switched-current bandpass ΣΔ modulators
(Institute of Electrical and Electronics Engineers, 1999)
This paper presents a systematic analysis of the major switched-current (SI) errors and their influence on the quantization noise shaping of SI BandPass SD Modulators (BPSDMs). Closed form equations are provided for the ...
Ponencia
Study of Non-Linear S/H Operation in Switched-Current Circuits Using Volterra Series - Application to BandPass Sigma-Delta Modulators
(2001)
This paper analyses the transient behaviour of SwItched-current (SI) memory cells placed at the front-end of high-speed A/D interfaces. Based on the Volterra series method, the non-linear sampling process occurring in ...
Ponencia
Top-Down Design of a xDSL 14-bit 4MSh ZA Modulator in Digital CMOS Technology
(Institute of Electrical and Electronics Engineers, 2001)
This paper describes the design of a Sigma-Delta modulator aimed for A/D conversion in xDSL applications, featuring 14-bit@4Msample/s in a 0.35μm mainstream digital CMOS technology. Architecture selection, modulator sizing ...
Artículo
A CMOS 0.8 μm fully differential current mode buffer for HF SI circuits
(Elsevier, 1998)
We present a high-frequency fully-differential current-mode buffer to interface off-chip currents with no significant degradation of the frequency response, and to measure current-mode ICs using standard equipment. It has ...
Artículo
Fourth-order cascade SC ΣΔ modulators: a comparative study
(Institute of Electrical and Electronics Engineers, 1998)
Fourth-order cascade ΣΔ modulators are very well suited for IC implementation using analog sampled-data circuits because of their robust, stable operation and their capability to achieve high resolution and wide bandwidth ...
Artículo
Analysis of error mechanisms in switched-current Sigma-Delta modulators
(Springer, 2004)
This paper presents a systematic analysis of the major switched-current (SI) errors and their influence on the performance degradation of ΣΔ Modulators (ΣΔMs). The study is presented in a hierarchical systematic way. First, ...