Results 221 to 230 of about 29,227 (261)

Chopper-stabilized sigma-delta modulator

1993 IEEE International Symposium on Circuits and Systems, 2002
A new architecture of the sigma-dela modulators using a chopper-stabilized configuration is described. It is shown that using this new architecture and without any other circuit techniques, a sigma-delta modulator becomes immune from the contamination of the inherent low-frequency noise, such as offset noise, flicker noise, and clock feedthrough noise.
Ying-Hwi Chang, Chung-Yu Wu, Tsai-Chung Yu   +2 more
openaire   +1 more source

Time-Interleaved Multirate Sigma-Delta Modulators

2005 IEEE International Symposium on Circuits and Systems, 2005
A new strategy for the implementation of multirate sigma-delta modulators (SDM) is proposed in this paper. In multirate SDM, the first integrator is clocked at a rate lower than the rest of the integrators in the forward path. In the new architecture, each integrator clocked at the high rate is replaced by two parallel integrators operating in ...
Francisco Colodro Ruiz, Antonio Jesús Torralba Silgado, Marta Laguna Garcia   +2 more
openaire   +1 more source

Analysis of multirate sigma-delta modulators

ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196), 2002
The theoretical basis for the linear analysis of multirate /spl Sigma/-/spl Delta/ modulators is presented. Polyphase decomposition is used to analyze the system and derive its transfer functions. Multiple quantization noise sources are introduced to make the polyphase decomposition possible.
openaire   +1 more source

On the stability of high order Sigma-Delta modulators

ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483), 2002
In this paper we present an approach for stability analysis of high order Sigma-Delta modulators. The approach is based on a parallel decomposition of the modulator. In this representation, the general N-th order modulator is transformed into decomposition of low order modulators, which interact only through the quantizer function. In the simplest case
Valeri M. Mladenov, Hans Hegt, Arthur H. M. van Roermund   +2 more
openaire   +2 more sources

On second-order sigma-delta modulators

Signal Processing, 1996
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Synchronization of Sigma Delta Modulators

2012
The paper deals with the synchronization of two chaotic Sigma-Delta Modulators. The synchronization is reached via two modulators: one of the modulators is used to code the input information into a bitstream, while the second demodulator is used to decode the obtained bitstream into the original state of the applied input signal.
Tsenov, G., Mladenov, Valeri, Taralova, Ina   +2 more
openaire   +2 more sources

Sigma–Delta Modulation

2012
The sigma-delta modulator is a specific algorithm to convert low-bandwidth signals into a digital data stream. In the first section the effects of oversampling are described both for the analog-to-digital converter as well as for the analog-to-digital converter.
openaire   +1 more source

Sigma Delta modulation is a mapping

1991 IEEE International Symposium on Circuits and Systems (ISCAS), 1991
The authors take the viewpoint that Sigma Delta modulation is a mapping in the mathematical sense. They describe the mapping in mathematical terms and find that it is a projection. An explicit formula is given for the set of all inputs which give rise to any given output pattern. The fact that the mapping is a projection suggests the existence of limit-
R. Schreier, W.M. Snelgrove
openaire   +1 more source

A laboratory sigma-delta modulator

Transactions of the Institute of Measurement and Control, 1991
A simple method of analysing the limit-cycling behaviour of a sigma-delta modulator is introduced which is used to determine the performance of a system designed specifically for student use. The analysis is extended to predict the closed-loop performance of the modulator.
C.P. Lewis, T.G. Hesketh
openaire   +1 more source

Trellis Sigma-Delta Modulation

2011
Chapter seven presents a full analysis of the Trellis sigma-delta modulation algorithm. This algorithm is the first pruned look-ahead sigma-delta modulation algorithm found in literature. It is a derivative of the full look-ahead algorithm and uses concepts from Trellis (Viterbi) decoding, hence the name. In the Trellis sigma-delta modulation algorithm,
Janssen, Erwin, van Roermund, Arthur
openaire   +2 more sources