introduction –EE 230

EE 230 Electronic Circuits and Systems

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Basics• Gary Tuttle 247 ASC I (MRC) & 335 Durham (ECpE) 294-1814gtuttle@iastate.edu

• TextMicroelectronic Circuits, 7th edition, by Sedra and Smith (recommended)

• Lab instructors- Kushagra Bhatheja - Xudong Liu - Souvik Kundu - Thomas Kimler - Matthew Strong - Le Freier

• Web site http://tuttle.merc.iastate.edu/ee230/homepage.htm

• Office Hours (335 Durham) Monday, Wednesday, and Friday — 1:15 p.m. to 4:00 p.m.

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E E 230. Electronic Circuits and Systems. (3-3) Cr. 4. F.S. Prereq: E E 201, MATH 267, PHYS 222 Frequency domain characterization of electronic circuits and systems, transfer functions, sinusoidal steady state response. Time domain models of linear and nonlinear electronic circuits, linearization, small signal analysis. Stability and feedback circuits. Operational amplifiers, device models, linear and nonlinear applications, transfer function realizations. A/D and D/A converters, sources of distortions, converter linearity and spectral characterization, applications. Design and laboratory instrumentation and measurements.

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Homework (20%) - assigned daily and collected weekly; 10-12 problems per week - work individually - allowed two late submissions (Turn it in by the next class period.)

Quizzes (25%) - Every day – Monday thru Thursday. - closed book and notes - one or two simple calculations, similar to practice problems - no make-up quizzes (2 or3 scores dropped at the end of the semester)

Exams - 3 mid-terms (25%) - 4 problems - closed-book, closed-notes. A formula sheet will be provided.

Lab (30%) - must be done with one partner - do the work during your scheduled lab time - write a lab report that will be due in one week

Grading

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Lab

• Labs start the week of Jan. 15.

• Work in two-person groups (pick your own partner)

• About 10 “cookbook” labs

• Three separate project designs

• Written report for every cookbook lab from the two-person group.

• Each design project will require a report done by the group.

• Lab attendance is required! If you miss a lab, you must make it up.

• If you know that you are going to miss a lab: a) inform your lab partner, b) inform your regular lab TAs, c) make up the lab on your own time.

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3 major sections

A. System considerations • Laplace transform techniques • Transfer functions • Filter circuits • Fourier series and transform

B. Op amps again • Op-amp basics (review for some) • non-ideal effects • gain-bandwidth • Stability • linear oscillators • input / output resistance • instrumentation amp • single-supply operation • comparators • comparator-based oscillators • 555 timer • Data converters

C. Transistors • Semiconductors • Diodes (review for some) • Diode applications • Bipolar junction transistors (BJTs) • BJT applications • MOSFETs • MOSFET applications • Small-signal analysis

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What do you need to know coming in

Basic math and physics - Systems of equations - basic calculus: differentiate and integrate sines, exp, etc. - Power, energy, electric fields

EE 201 skills - KVL & KCL - voltage divider, node-voltage, etc. - AC analysis

Lab skills - multi-meter - oscilloscope - DC and AC supplies - circuit construction - DEBUGGING !!!

SPICE (PSPICE), Excel or Matlab for making plots.

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Electronic systems vs. integrated circuit design (VLSI)All modern electronics involves integrated circuits (chips) in some fashion. • Microprocessors • Micro controllers • Memory • Op amps • Data converters • Regulators • Etc., etc., etc.

Chips consist of large numbers of components all built together in a single package. Most of the components are transistors.

Op amp → 100 Regulator → 1000 Microcontroller → 1,000,000 Microprocessor → 108

Memory → 1010

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Electronic systems are designed using chipsChips that provide various functionality are wired together on a printed circuit (PCB). The collection of parts work together to provide some sort of higher level functionality. The size of the printed circuit board is measured in inches.

Where are they used? Everywhere.

What companies need electronic systems engineers? All of them

Usually involve a micro controller.

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IC designers design the chips.Integrated circuit designers take transistors (possibly billions of them) and put them into circuits to achieve some specific functionality. The scale is on the order of micrometers and nanometers.

Who makes them? Relatively few companies - Intel, Samsung, Texas Instruments, TSMC, and a handful of others.

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Analog versus digital

Analog → Concerns specific voltage or current levels. Amplifiers, sensors, regulators, etc. Mimics nature (sound, light,etc.) Designing analog circuits can be difficult and finicky.

Digital → Two levels only: high and low (0 and 1). Logic gates, microprocessors, memory, etc. Very forgiving in terms of design.

Robert Widlar

Digital is much better for computation and signal processing. But the world is still analog. So there is always a need for converter circuits: analog-to-digital (ADC) and digital-to-analog (DAC).

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EE 230 → General introduction to electronics. (Some systems and some IC.)

EE 333 → Electronic systems projects.

EE 330 → Intro to design of integrated circuits. (Emphasis on circuits.)

EE 332 → Semiconductor device physics. (How transistors work.)

EE 432 → Semiconductor fabrication. (How to build integrated circuits.)

EE 435 → Analog integrated circuit design.

CprE 465 → Digital integrated circuit design.

EE 414 → High frequency (RF or microwave) circuit design.

EE 436 → Transistors. (Advanced treatment of transistors.)

EE 438 → Optoelectronics (Electronics that also interact with light.)

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Electronics trends

Always… • Faster (higher clock rates, higher frequencies) • Smaller • Cheaper • More energy efficient

This is true for both electronic systems and integrated circuits. (In the IC business, the pace of development has been governed by Moore’s Law.)

Working towards designKnowledge comes by taking things apart. But wisdom comes by putting things together. – John A. Morrison