By Frank Ohnhäuser
This e-book deals scholars and people new to the subject of analog-to-digital converters (ADCs) a large creation, sooner than going into information of the cutting-edge layout ideas for SAR and DS converters, together with the newest learn subject matters, that are necessary for IC layout engineers in addition to clients of ADCs in purposes. The publication then addresses very important issues, reminiscent of right connectivity of ADCs in an program, the verification, characterization and checking out of ADCs that determine top of the range finish products.
Analog-to-digital converters are the vital aspect in any facts processing approach and rules loops reminiscent of modems or electric motor drives. They considerably have an effect on the functionality and determination of a procedure or finish product. approach improvement engineers have to be acquainted with the functionality parameters of the converters and comprehend the benefits and drawbacks of a few of the architectures. built-in circuit improvement engineers need to triumph over the matter of attaining excessive functionality and determination with the bottom attainable energy dissipation, whereas the electronic circuitry generates distortion in offer, flooring and substrate. This publication explains the connections and provides feedback for acquiring the top attainable answer. Novel traits are illustrated within the layout of analog-to-digital converters in line with successive approximation and the problems within the improvement of continuous-time delta-sigma modulators also are discussed.
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Additional info for Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters
Their linearity is poor as it fully depends on the magnetic core. Disregarding the poor linearity, they are most widely used in e-meter. A typical block diagram of an e-meter is shown in Fig. 42. Microcontrollers calculate the power and perform the measurements with internal ΔΣ ADCs. The neutral line acts as the ground potential. The supply voltage VDD of the controller is generated cost effectively using diodes and capacitors. The current transformer, which senses the phase current, has the required galvanic isolation inherently included.
Frequencies, which are an integer multiple of the modulator clock divided by the used over-sampling ratio, are suppressed. These points are called notches. In this concept, the decimation ratio of the integrator is chosen in a way that the carrier frequency is falling into a notch and is canceled by the digital filter. The carrier signal can also be generated digitally. As an example, at a fixed carrier frequency is programmed in bitstream format and is applied to the carrier coil of the resolver.
29. com/docs/AV021289EN, status of 3/11/2015. 30. pdf, status of 3/11/2015. 31. Frank Ohnhaeuser, Analog isolation, in the journal Power System Design, pp. pdf, pp. 22–24, status of 3/11/2015. 32. ar/patents/US7196643, status of 3/11/2015. 33. Frank Ohnhaeuser, Integrated IC solutions for power measurement in Smart Grid Applications, in the proceedings of the International Conference on Smart Grid – Technology, Economics and Policies (SG-TEP2012), 4 pages, 2012. 34. com/docs/ AV02-0409EN, status of 3/11/2015.
Analog-Digital Converters for Industrial Applications Including an Introduction to Digital-Analog Converters by Frank Ohnhäuser