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ΣΔ A/D CONVERSION FOR SIGNAL CONDITIONING by Kathleen Philips, Arthur H. M. van Roermund (auth.) PDF

By Kathleen Philips, Arthur H. M. van Roermund (auth.)

ISBN-10: 1402046790

ISBN-13: 9781402046797

ISBN-10: 1402046804

ISBN-13: 9781402046803

1.1 history Moore’s legislations predicts a lessen by way of an element of 2 within the function measurement of CMOS te- nology each 3 years and has been legitimate for years. It implies a doubling of the - eration pace and a 4 instances larger transistor count number according to unit of zone, each 3 years. the mix results in an 8 occasions greater processing power according to unit of region. This on-going miniaturization permits the mixing of advanced digital platforms with thousands of transistors (Very-Large-Scale-Integration) and allows the mixing of el- tronic structures. An digital approach A wide-spread photograph of an built-in digital method is proven in ?g. 1.1. the center of the procedure is the sign processing center. This middle helps a large choice of services, similar to customization and programmability of a number of functions, channel coding, the de?nition of the consumer interface, and so forth. those services are enabled via DSP, a controller CPU and numerous blocks of reminiscence. In complex ICs those blocks supply (almost) all sign processing and customarily dominate within the total energy and sector intake of built-in platforms. the massive info charges concerned, require high-speed busses for communique among those blocks. A power-management unit fuels the process by way of offering the - propriate offer voltages and currents.

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This is due to the omission of vGT , kT,etc. By consequence, these relations only express a proportionality between the value at the left and at the right hand side. 1, most work on power/performance relations only takes into account BW and DR [55], [12], [3] and [57]. This corresponds to the results of the α = 0 case in the analysis above. Reference [5] does consider distortion. o. a relation for the absolute minimum power of an analog circuit as a function of the required SINAD and signal bandwidth.

5] analyzes the absolute minimum power consumption of analog circuits as a function of a specific SINAD over the full signal bandwidth. In [8], [58] the model is refined by including the circuit’s intrinsic distortion due to a finite output impedance. 37 38 POWER CONSUMPTION IN CHANNEL BUILDING BLOCKS Many power/performance relations and extrapolated predictions on circuit performance have been published. [1], [4], [59], [12] and many other references treat power requirements due to limitations on matching, bandwidth, dynamic range, etc.

Using eq. 18, power consumption then becomes cubic in mfs instead of proportional. In the above analysis, this variation has been disregarded for simplicity reasons. The various remarks in this paragraph do underline the prime importance of the sample rate on the power consumption of a digital block. Technology scaling Any analysis of power consumption in digital blocks would not be complete without stressing the benefits of technology scaling. 25µm-CMOS a penalty in power consumption is more likely [5]), for digital circuits the power decrease is substantial.

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ΣΔ A/D CONVERSION FOR SIGNAL CONDITIONING by Kathleen Philips, Arthur H. M. van Roermund (auth.)

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