Implementation of analog systems
- Josef Dobeš, Jiří Hospodka, Jiří Náhlík, Ondřej Šubrt
- Jiří Hospodka, Jiří Náhlík
- Department of Circuit Theory
The goal of the subject is to make students familiar with the new trends and concepts in analog circuits with an emphasis on the applications in the digital system peripherals. Here, the stress is placed on the design and implementation procedures of Application Specific Integrated Circuits (ASICs). Current design trends are discussed, including the analysis and test of analog and mixed signal circuits. The course provides knowledge for the development and design of electronic systems taking into account the aspects of current manufacturing technology of integrated circuits.
- Syllabus of lectures:
1.State of the art of the analog technique and its application. New principles of continuous-time and sampled data systems. Current mode circuits - basic functional blocks. Selection and specifics of functional blocks for custom IC (ASIC).
2. Semiconductor diode model, its temperature dependence, noise model. Gummel-Poon model of the bipolar transistor. Modeling of microwave transistors.
3. Extension of Schichman and Hodges JFET model. Thermal and noise properties. MESFET / PHEMT models.
4. Technology based MOSFET models, parameters derived from the technology and its automatic conversion with respect to the changing dimensions (scaling). BSIM and EKV models and their comparison, identification of model parameters.
5. Current feedback - CFOA amplifier. Voltage and current feedback comparison. Current-mode circuits and their design principles. Adjoint transformation, translinear principle.
6. Active elements for the current mode and design of elementary functional blocks. Derived higher order FB. Non-linear elements - multipliers, shapers, modulators. Circuits and their parameters.
7. Micropower circuits - principles and properties. Introduction to the characterization of integrated systems in the subtreshold mode. Design of voltage and current reference sources for ASIC structures.
8. Sampled data and discrete time circuits: circuit description of SC and SI circuits, properties of functional blocks, parasitic effects and their influence to switched networks, the possibility of CAD analysis of real properties.
9. Technological and circuit requirements for SC and SI circuits (capacitors, switches, amplifiers, switching frequency). Influence of real properties, the clock signal feedthrough, noise. Possible circuit corrections with respect to the real properties.
10. Switched power management circuits, DC / DC converters. The principles of feedback control of switching systems, application examples.
11. Charge pumps and their design. Circuit solutions, simulation, analysis and capabilities in ASIC structures.
12. A circuit for pulse modulation. Sigma-delta modulator - properties, implementation.
13. A/D and D/A converter structures in the ASIC. Fundamentals of modeling, simulation and testing.
- Syllabus of tutorials:
1. Safety in the lab, test of the input knowledge, introduction to Maple.
2. Operational networks. Property comparison of the networks with voltage and current feedback.
3. EKV model of the MOS transistor for low voltage applications with low power consumption. OTA and OpAmp design, optimization of key parameters. Design of current conveyor and CFOA.
4. Circuit design of transconductance amplifier and current conveyor. Introduction to Mentor Graphics.
5. Voltage and current references design - circuit calculation and simulation.
6. Design and Simulation of micropower circuits - low-power voltage reference circuits.
7. OTA-C filters, OTA-C biquadratic filter design.
8. Description of SC and SI circuits, difference equations. Analysis and simulation of SC and SI circuits. The PraCAn library.
9. Design and simulation of SC biquad. SC filter design using FCAD.
10. Minimizing the impact of real properties of SI and SC circuits.
11. Lab - design and measurement of SC filter.
12. Design and simulation of the charge pump.
13. Presentations of semestral projects.
14. Presentations of semestral projects, credits.
- Study Objective:
- Study materials:
1. Sanssen, W.M.C.: Analog Design Essentials. Springer, U. S., 2006
2. Gray, P. R., Hurst, P.J., Lewis, S.H.: Analysis and Design of Analog Integrated Circuits. John Wiley & Sons, U.S., 2001
3. Burns, M., Roberts, G. W.: An Introduction to Mixed-Signal IC Test and Measurement. Oxford University Press, New York 2001
- Further information:
- Time-table for winter semester 2021/2022:
Mon Tue Wed ThuroomT2:C4-362
- Time-table for summer semester 2021/2022:
- Time-table is not available yet
- The course is a part of the following study plans:
- Electronics and Communications - Electronics (compulsory elective course)