EE 122Discrete Analog Circuit DesignD. W. Parent1Course DescriptionCourse Description•The analysis and design of electronic circuitsThe analysis and design of electronic circuits based on operational amplifiers (opamps), diodes, metal oxide semiconductor (MOS) transistors and bipolar junction transistors (BJTs), as applied to the contemporary issues of bi di ldidti(lbiomedical devices and power generation (solar cell modules), and power usage. Electronic CAD tools (LTPSICE) will be used extensivelytools (LTPSICE) will be used extensively, Introduction to PCB board design.2Blood Cell PhonesBlood Cell Phoneshttp://news.discovery.com/tech/blood-cell-phones-fuel-war-crime-and-human-rights-abuses.html3http://cds.linear.com/docs/LT%20Journal/LTJournal-V21N1-2011-04.pdfhttp://www.mercurynews.com/business/ci_18711322?source=rss4http://www.mercurynews.com/business/ci_18711322?source=rss5Analog IC Design is importantAnalog IC Design is important •The outside world is continuousThe outside world is continuous• Trend in integrating analog and digital circuits (System on a chip)circuits (System on a chip)• Lower power than Digital SystemsBattery Technology has notBattery Technology has not Scaled with “Moore’s Law”6Analog ICs are used toAnalog ICs are used to• Filter SignalsProcess information•Process information• Controls• Computation•Acquire data from sensorsAcquire data from sensors7Need Analog Signal Processing to ddfDSPget data prepared for DSPExpensive Digital0 0 01 0 11 0 0Inexpensive Analog CircuitryCircuitryADCDSP0 0 01 0 1AlifiInexpensive DigitalCircuitryExpensive Analog CircuitryADC DSP1 0 0FILTERAmplifier8The functionally can be split into many different architectures.An OPAMP is worth a CPUAn OPAMP is worth a CPU•OPAMPS can be used to directlyOPAMPS can be used to directly implement filters, and control systemsNo A2D D2A’s required–No A2D D2A s required.• To have digital control systems you need an A2D and a D2A at the front and backan A2D and a D2A at the front and back ends to get data in proper format for DSP chipsto workchips to work.9Issues with Analog IC’sIssues with Analog IC s•Digital Circuits trade between power andDigital Circuits trade between power and speed•Analog circuits trade off betweenAnalog circuits trade off between– Speed–PowerPower–Gain–Matchingg– Precision–Noise10Issues with Analog IC’sIssues with Analog IC s•Digital circuit design can be automated atDigital circuit design can be automated at many levels–Full custom– Semi-custom–ASIC–FPGA•Analog circuit design is very hard to ggyautomate– Expensive to design11FPAA?? Analog Leaf Cell?Statistical Process Control• Everything varies, get over it.• CMOS Digital Circuits are robust against variance. – Signals go Rail to Rail unless there is a defectVi idi d it j t d–Variance in drive and capacitance just speed up or slow down the circuit.•Analog circuit parameters like VT and Drive•Analog circuit parameters like VT and Drive have to match closely•SPC is a formal method used to track and dealSPC is a formal method used to track and deal with variances in that relies on data, not force of personality12Canon, EQL, National Semi This slide alone got a job interviewCourseObjectivesCourse Objectives• To prepare you to do an outstanding senior projectsenior project• To prepare you for your first job–Many EE122 topics are job interview questions, regardless of the job!• OPAMPS•DIODES– Solar Cell, Signal processing•Transistors MOS BJT single device13Transistors, MOS, BJT single device amplifier circuit, digital logic.Wealth Creation means new products• Have to know some concepts “cold”.p• Have to be able to verify a circuit's functionality in a CAD toolfunctionality in a CAD tool• Have to be able to answer open ended questionsquestions.• Have to be able to synthesize new things from “old” conceptsfrom “old” concepts.• Sometimes design is choosing the correct 14parts from an effectively infinite catalog.We need to prepare you for the next economy•Team based HWTeam based HW• Open ended questions“S t ” ti•“Set up” questions• Quizzes to check learning• Active learning in class1510 hours minimum to succeed in class• Earning a B should be the minimum goal (No curve so all gg(can achieve this.)• Work together• Read the chapter ahead of class, write down questions, ask questions in class.•Read notes after class try homework•Read notes after class, try homework.• Compare work on HW with team• Make up your own exam quiz questionspy q q• Decide now if your life can not handle a minimum10 hour a week commitment.• Make sure your friends make you better.• Go to office hours!!!Design is a process or flow of events•ID needID need• Develop specificationHd li•Hand analysis• Circuit function verification with CAD tool.• Prototype and test the design•Make changes document fabricate/sell/Make changes, document fabricate/sell/ get paid. Support customer17There are three elements of design•FunctionFunction•TimeCt•Cost18Analog Components varyAnalog Components vary•Voltage divider exampleVoltage divider example• Select