EE W240A

Linear Integrated Circuits

This course will examine the technology and circuit techniques associated with integrated monolithic amplifier circuits and the challenges that lie ahead in their development. The goal is to achieve a basic understanding and knowledge of the driving and limiting factors in circuit performance, of circuit design techniques, and of fabrication techniques and technology issues important to integrated amplifier circuits in general, and to op-amps in particular.

Course objectives: To give the student a firm grounding in the analysis and design of MOS and bipolar analog integrated circuits. Emphasis is placed on the practical aspects of IC design, and on intuitive understanding of circuit behavior as opposed to heavily analytical approaches. A heavy emphasis is placed on design content, and the students use SPICE as a simulation tool.

Units
 Estimated Workload: 12 hours/week
 Prerequisites: MAS-IC Students Only
Weekly Format:

~3 hrs lecture

~1hr discussion

~8 hrs work

Topics covered:

  • Single-stage amplifier configurations with emphasis on MOS, other technologies (e.g. BJT) for comparison
  • Multi-stage amplifiers, cascode, Darlington connections
  • Differential pairs, differential and common mode responses, common-mode rejection
  • Transistor current sources, current mirrors, cascading
  • Supply and temperature independent biasing and references
  • Frequency response
  • Parasitic capacitances in transistors
  • Bode plot
  • Gain-bandwidth product
  • Approximation techniques and the zero-valued time constant approach
  • Feedback concepts
  • Series and shunt configurations
  • Feedback network loading
  • Gain desensitization and input/output impedance modification
  • Analysis of general purpose single and multi-stage transconductance and operational amplifiers
  • Stability, phase and gain margin
  • Compensation of amplifiers with feedback, pole splitting
  • Slew rate in operation amplifiers
  • Role and use of CAD tools such as SPICE in design process

Fall 2013 – Nguyen