Read e-book online Continuous Time Sigma Delta Modulation for A d Conversion in PDF

By Lucien Breems, Johan H. Huijsing

ISBN-10: 0306480042

ISBN-13: 9780306480041

ISBN-10: 0792374924

ISBN-13: 9780792374923

This article describes the layout and concept of continuous-time sigma-delta modulators for analogue-to-digital conversion in radio receivers. The book's major concentration is on dynamic diversity, linearity and tool potency facets of sigma-delta modulators, that are vitally important requisites to be used in battery operated receivers.

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Read or Download Continuous Time Sigma Delta Modulation for A d Conversion in Radio Receivers Volume 634 (The Springer International Series in Engineering and Computer Science) PDF

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Additional info for Continuous Time Sigma Delta Modulation for A d Conversion in Radio Receivers Volume 634 (The Springer International Series in Engineering and Computer Science)

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8 dB which agrees with the theoretical result (white noise assumption). CONTINUOUS-TIME MODULATION FOR A/D CONVERSION IN RADIO RECEIVERS 43 Continuous-time sigma-delta modulation It should be noted that Eq. (3-22) only applies to a feedback pulse with a periodic return-to-zero state. In the case of a full period feedback pulse without return-to-zero, the jitter power depends on the relative number of edges in a bitstream sequence. This can be easily understood considering a 11110000 and a 01010101 bitstream sequence (no return-to-zero).

It is assumed that the input of the quantizer is a sinusoidal waveform. 3 Linear stability analysis output power of the quantizer. 19]. This means that for a certain range of phases, the quantizer produces the same output pattern, regardless of the phase of the input signal. 3-16 for a sinusoidal quantizer input signal with frequency in the case of a one-bit quantizer. 3-16 (solid line). Both at sample moments and the quantizer gives a positive output. At sample moment the quantizer output is negative.

Therefore, suppression of the image channel, in the case of low-IF receivers, is also less effective. This implies that the image rejection requirement for the ADCs in a quadrature configuration becomes more stringent as well. 6 Summary In this chapter some important performance parameters for the A/D converter in a radio receiver have been described. It was shown that the performance requirements strongly depend on the place of the A/D converter in the receiver. For reasons of cost, size and complexity reduction, an important trend in receiver design is digital integration of analog functionality, such as mixers and filters.

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Continuous Time Sigma Delta Modulation for A d Conversion in Radio Receivers Volume 634 (The Springer International Series in Engineering and Computer Science) by Lucien Breems, Johan H. Huijsing


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