By D. Wouter, J. Groeneveld, Douwe T. de Jong (auth.), Willy Sansen, Johan H. Huijsing, Rudy J. Van de Plassche (eds.)
This quantity concentrates on 3 subject matters: combined analog--digital circuit layout, sensor interface circuits and conversation circuits. The ebook includes six papers on every one subject of an academic nature aimed toward enhancing the layout of analog circuits. The ebook is split into 3 components.
Part I: combined Analog--Digital Circuit Design considers the most important progress zone in microelectronics. either commonplace designs and ASICs have all started integrating analog cells and electronic sections at the comparable chip. The papers disguise themes similar to groundbounce and supply-line spikes, layout methodologies for high-level layout and real combined analog--digital designs.
Part II: Sensor Interface Circuits describes numerous different types of sign conditioning circuits and interfaces for sensors. those comprise interface options for capacitive sensors, sigma--delta modulation used to mix a microprocessor suitable interface with on chip CMOS sensors, injectable sensors and responders, sign conditioning circuits and sensors mixed with oblique converters.
Part III: verbal exchange Circuits concentrates on platforms and applied circuits to be used in own communique platforms. those have functions in cordless phones and cellular mobilephone platforms to be used in mobile networks. an immense requirement for those platforms is low strength intake, specially whilst working in standby mode, in order to maximise the time among battery recharges.
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Additional info for Analog Circuit Design: Mixed A/D Circuit Design, Sensor Interface Circuits and Communication Circuits
Based on the implemented multi-time-step algorithm for each circuit part a different accuracy level can be choosen which will influence the time step size for every subsystem and at least the overall simulation speed. 3. Hierarchical System Description ELDO offers the possibility to describe the whole system by its hierarchy, for example with subcircuits. This way is completly covered by the integration of the ELDO simulation system in different Design f'rameworks and hierarchical nctlist extraction tools .
The DAC in the feedback loop is modelled by the linear transfer function M2 and the zero order Hold FH. By shifting the analog loop filter, the loop delay and the sampling gate to the other sides of the summing point we get the modified block diagram shown in Fig. 3. _ Stj v(nT)f,;& <>-<>-+ e-st f~ 29 1 Mi y'Cnn 1- z-I - VF 0 v- ''-----. J/ C(s) Fig. 3: Modified Block Diagram To get a loop with only time discret transfer functions, the time continuous C(s) in the feedback loop must be transferred into the z-domain.
Blttl '--- I-- .. _hi .. b. to .... -E! -£j Pig. 3. DesignStar schematic diagram of MC3479 stepper motor driver chip. , ....... hi Pig. 4. DesignStar schematic diagram of output stage motor driver circuitry. question that must be answered regarding simulation is: What MUST the designer be able to simulate in order to insure that his design will work as specified? As the system complexitygrows it becomes necessary to employ alternative methods of representing a design in order for simulation to yield meaningful results in a timely fashion.