By Marcel Pelgrom
This textbook is acceptable to be used in graduate-level curricula in analog-to-digital conversion, in addition to for working towards engineers short of a state of the art reference on info converters. It discusses numerous analog-to-digital conversion ideas, together with sampling, quantization, reference iteration, nyquist architectures and sigma-delta modulation. This e-book provides an outline of the state-of-the-art during this box and specializes in problems with optimizing accuracy and velocity, whereas decreasing the facility level.
This new, 3rd variation emphasizes novel calibration recommendations, the explicit necessities of latest platforms, the results of 22-nm know-how and the necessity for a extra statistical method of accuracy. Pedagogical improvements to this variation contain extra, new workouts, solved examples to introduce all key, new strategies and warnings, feedback and tricks, from a practitioner's standpoint, at any place applicable. substantial history details and functional information, from designing a PCB, to lay-out facets, to trade-offs on approach point, supplement the dialogue of simple rules, making this ebook a invaluable reference for the skilled engineer.
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Additional resources for Analog-to-Digital Conversion
Therefore digital circuits that generate and propagate the sample pulse must be treated as if these were analog blocks. 15. The clock buffer in Fig. 31 has edge transition times of 70 ps. 2 V. Solution. Due to voltage changes on the power supply lines, the currents inside the buffer will change, in first order proportional to the voltage change.
4 The Fourier transform definition and p its inverse require that a factor 1=2 is added somewhere. Physicists love symmetry and add 1= 2 in front of the transform and its inverse. Engineers mostly shift everything to the inverse transform, see Eq. 15. More attention is needed when a 8 2 Sampling As(t) A(t) (a) time Ts (b) A( ) A s( ) BW (c) time frequency 0 (d) fs frequency 2fs Fig. 1 Sampling an analog signal (a) in the time-continuous domain results in a series of analog signal samples (b). t/ of Fig.
15c, f. The procedure in Fig. 15 can be used because the bandwidth of the original signal is less than half of the new sample rate. Thereby this signal fulfills the Nyquist criterion for the new sample rate fs =M. In cases where this is not the case, the bandwidth must be sufficiently reduced, before subsampling is applied. If this is omitted, serious aliasing will occur with loss of information. 4 Chopping Chopping is a technique used for improving accuracy by modulating error-sensitive signals to frequency bands where the signal processing is free of errors, see also 10 Subsampling by a rational factor (a division of two integers) or an irrational factor requires to calculate the signal at each new sample moment by interpolation of the existing samples.
Analog-to-Digital Conversion by Marcel Pelgrom