Analog circuits are notoriously difficult to learn. Taking the most common transistor, when we analyze it, we must first analyze the DC bias, and then analyze the AC output voltage. It can be said that determining the operating point is a rather cumbersome task (in practice), there are many parameters of the transistor, and the discreteness of the parameters is also relatively large.
Of course, there is no quick fix in the IC industry. It's not that you can get started directly after studying two books. Not only can you not answer the professional questions asked by the company during the interview, let alone the relevant project experience.
First, let’s take a look at the job responsibilities of an analog IC design engineer:
1. Design and develop AC-DC, DC-DC and DC-AC power modules;
2. Define IC system indicators;
3. Make suggestions on IC pin definitions and packaging forms;
4. Make suggestions on IC system functions;
5. Prepare IC technical documents, such as Datasheet, Design Guide, etc.;
6. Assist in the preparation of IC verification PCB version and demo version;
7. Assist in the development of IC application systems;
8. Evaluate the reliability of IC system applications , and provide improvement suggestions;
9. Responsible for the floor plan of the layout, supervise and assist the completion of the layout.
Knowledge section that analog IC must master
(1) The design of transistor components
refers to the knowledge of semiconductor engineering. Any designed IC chip will eventually return to it. Generally, it is derived from the Schrödinger wave equation (more complicated), but it is different from the actual design of the circuit. There is not much direct connection, and we cannot lack this part, which is the theoretical basis.
(2) Transistor circuit design
In order to engage in analog circuit design, one must master the basic knowledge of transistor circuits. It is recommended to experiment and simulate while studying. After a long time, we can naturally master the design technology of transistor circuits, and we will start to master the experience in the learning here. Transistors and FETs are the basis for building the entire circuit. After learning here, the schematic diagrams of many ICs are very intuitive.
(3) Design of functional modules
Functional modules are mainly based on various op amps, including AD, DA, PLL, voltage regulators, etc., which are mainly composed of transistors, and will be used in the functional module design project Appropriate idealization of components. This part of the study is very important. Generally, you start to learn analog circuits from here. This part is relatively easy to understand, and it is also the entry point for learning analog circuits.
(4) System design
This part requires considerable height and needs to consider all aspects. If you have actually done one or two pieces of film, you will be able to pass most of the parts. The key is to experiment and do it.
Must-read book recommendations:
1. Razavi Razavi Second Edition "Analog CMOS Integrated Circuit Design"
Introduction:
This book is a classic textbook on the design of analog CMOS integrated circuits. It introduces the analysis and design of analog CMOS integrated circuits. CMOS amplifying cell circuits, differential amplifiers, frequency response, noise, feedback amplifiers and stability, operational amplifiers, voltage and current references, discrete-time systems, nonlinearity in differential circuits and feedback systems, oscillators and phase-locked loops Analysis and design of basic analog circuits.
The book also introduces the fundamentals of the basic manufacturing process, layout, and packaging design of integrated circuits. Since its publication, this book has been well received and favored by readers at home and abroad, and has been selected as a textbook by many well-known universities at home and abroad. At the same time, due to the rich research experience of the original author in world-renowned companies, this book is also very suitable as a reference book for researchers and engineers in CMOS analog integrated circuit design or related fields.
2. Allen Allen Second Edition "CMOS Analog Integrated Circuit Design"
Introduction:
"CMOS Analog Integrated Circuit Design (Second Edition)" is a classic textbook for analog integrated circuit design courses. The author starts from the frontier of CMOS technology and combines rich engineering and teaching experience to explain the principles of CMOS analog circuit design. And technology and easily overlooked issues are given a detailed discussion, and the method of layered design is expounded. The book is divided into ten chapters.
It mainly introduces the background knowledge of analog integrated circuit design, CMOS technology, device models and the principle and design of main analog circuits, including CMOS basic unit circuits (MOS switches, MOS diodes, active resistors, current drains, current sources, current mirrors, Bandgap reference source, reference current source and voltage source, etc.), amplifiers, operational amplifiers, comparators, switched capacitor circuits, D/A and A/D conversion circuits.
3. Gray Gray Fourth Edition "Analysis and Design of Analog Integrated Circuits"
brief introduction:
"Analysis and Design of Analog Integrated Circuits (4th Edition) (Translated Version)" introduces the analysis and design of analog integrated circuits. It comprehensively expounds the basic principles and concepts of analog integrated circuits, and also expounds the new technologies and new concepts of analog integrated circuits. The book has twelve chapters.
"Analysis and Design of Analog Integrated Circuits (4th Edition) (Translated Version)" is a textbook or reference book for the analysis and design of modern analog integrated circuits. It can be used not only as a textbook for graduate students or senior undergraduates, but also as a reference book for applied engineering. At the same time, it is a relatively comprehensive and systematic monograph on analog integrated circuits.
4. Willy Sansen "The Essence of Analog Integrated Circuit Design"
Introduction:
The main feature of this book is that the author first analyzes the design technology of analog integrated circuits, and at the same time pays attention to the analogy and summary of various circuit technologies, focusing on the analogy between bipolar circuits and CMOS circuits, and finally Many examples are given that incorporate current directions in IC design, such as low supply voltage design issues, several circuit techniques for increasing gain, capacitive noise matching, and more.
These contents are rare in other analog integrated circuit design textbooks. This arrangement enables readers to not only deepen their understanding of concepts when learning circuit design theory, but also directly apply the theory to engineering design. Theory becomes more vivid.
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