EEC114 - Analog Integrated Circuits

3 units - Fall Quarter

Lecture: 2 hours

Laboratory: 3 hours

Prerequisites: courses 110B and 140B

Grading: Letter

Catalog Description: Analysis and design of analog integrated circuits. The emphasis is on bipolar transistor circuits. Single-stage amplifiers, cascaded amplifier stages, current sources, differential pair, frequency response, and feedback amplifiers.

Relationship to Outcomes:
Students who have successfully completed this course should:

Course Outcomes Program Outcomes
Be able to explain the hybrid-pi model of the bipolar junction transistor 1a
Be able to analyze and design amplifier, current-mirror, and output-stage circuits 3a, 3b, 4a
Be able to analyze the operation of a transistor level circuit of an operational amplifier. 1a, 1b, 1c
Know how to use SPICE to find the characteristics of amplifiers, current mirrors, and output stages 2a, 2b
Be able to use laboratory equipment including signal generators and oscilloscopes 2a
Be able to contribute effectively to a group design project. 4c
Be able to write an effective lab report. 6a

Expanded Course Description:

  1. The Bipolar Transistor
    1. Ebers-Moll Model
    2. The Hybrid-Pi Small Signal Model
  2. Passive Components in a Bipolar Process
    1. IC NPN and PNP Transistors
    2. Resistors - Diffused, Pinched; Sheet Resistance
    3. Capacitors
  3. Terminated Two-Port Models for the Single Stage Transistor Circuits
    1. Common Emitter, Common Collector, Common Base, and Common Emitter with Degeneration Stages
    2. Cascading Stages
    3. Simplifying Approximations
  4. Current Sources
    1. Simple, Widlar, Wilson, and Cascode Current Sources
    2. Large- and Small-Signal One-Port Models
    3. The Current Mirror
  5. Differential Pair
    1. Large-Signal Transfer Characteristics
    2. Small-Signal Half Circuit Concepts
    3. Common-Mode Rejection Ratio
    4. Active Loads
    5. Practical Considerations - Mismatches, Offset Voltage
  6. Output Stages
    1. Class A
    2. Class B
    3. Class AB
  7. Op Amp Frequency Response
    1. DC Bias
    2. Small-Signal Model
  8. Frequency Response
    1. Miller Effect
    2. Dominant Pole Approximations
    3. Open Circuit Time Constants
  9. Feedback
    1. Concept, Ideal Feedback Equations
    2. Analysis Methods
  10. Stability of Feedback Circuits
    1. Gain and Phase Margin from Bode Plots
    2. Compensation

Textbook: P. R. Gray and R. G. Meyer, Analysis and Design of Analog Integrated Circuits, Wiley, Second Edition, 1984.

Computer Use:
As part of the homework assignments, students are required to run the circuit simulation program SPICE 3 to 4 times during the quarter to compare computer simulation and hand analysis of circuits.

Laboratory Projects:
The lab consists of 6 weeks of three hour experiments which reinforce the lecture material, provide hands-on experience with test equipment, and require some design calculations. For the 3 week long design project, students are given a set of specifications for a multi-stage circuit and some design guidelines. The students then design a circuit to meet the specifications, simulate it using SPICE, and construct and test it in the lab. The TA checks the design to see if it meets the specifications.

Lab I: Bipolar transistor characteristics, measurement of small-signal parameters
Lab II: Single stage amplifier characteristics, measurement of gain, input and output resistance
Lab III: Current sources, output resistance
Lab IV: Differential amplifiers, Cascaded gain stages
Lab V: Op amp circuits, practical considerations
Lab VI: Design project using bipolar transistors (3 weeks)
Lab VII: Frequency response, compensation lab

Engineering Design Content:
Analog, biopolar integrated circuit design will be covered. Topics will include: bi-polar transistor operation, small-signal models, passive components, single stage amplifiers, the differential pair, current sources, active loads, output stages, the operational amplifier, frequency response, feedback, stability and compensation. There will be weekly three hour laboratories and one large open-ended design project. The course teaches analog circuit design, discussing trade-offs and costs (in terms of IC area). The labs and particularly the design project give the students an opportunity to undertake and complete a design. Many solutions exist given the design project specifications. In the past, every project has resulted in 3 to 5 different approaches being used.

Professional Component: Engineering Depth, Laboratory
Engineering Science: 1 unit
Engineering Design: 2 units

Updated: 3/06