Electrical Engineering and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

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Courses

EE 105. Microelectronic Devices and Circuits

Current Schedule (Spring 2008)

Description

Course objectives: This course introduces the basic theory of semiconductor devices and circuits, and the basic circuit analysis skills for large-signal, small-signal, and ac frequency response. Its intention is to promote rigorous thinking about semiconductor devices and circuits through precise modeling.

Topics Covered:

  • Introduction; Semiconductors - Microelectronics; Moore's Law; Semiconductor basics: Intrinsic silicon, electrons, holes, charge neutrality; Doping: Donors, acceptors, compensation.
  • Charge transport and the IC resistor - Transport: Drift, drift current density, Ohm's law, velocity saturation; IC resistor: Lateral drift current.
  • IC Fabrication - IC resistor: Non-linear resistor; IC resistor: Capacitance (interconnect); Approximate passive models: Extraction; Diffusion currents.
  • Electrostatics Review - 1-D Gauss's law and boundary conditions; Metal-metal capacitor layout; Charge, fields, and capacitance.
  • pn Junctions: Thermal equilibrium - Depletion approximation; Potential vs. doping: The built-in potential; Charge, field, potential for pn junction.
  • pn Junctions: Reverse bias, Forward bias, and Capacitance - Charge, field, potential in reverse bias: qJ = f(vD); pn Junction capacitance: Cj = dqJ / dvD; pn Diode in forward bias: A first pass and the i-v relationship.
  • MOS Capacitors - Surface charge in thermal equilibrium; Depletion, accumulation, and inversion; qG = f(vGS) and Cg = dqG / dvGS .
  • MOSFETs: Large-signal Model - Symbols and drain characteristics; Triode and saturation regions; Backgate effect.
  • MOSFET Sample & Hold Circuit - Graphical analysis; Analytical solution; SPICE.
  • Common Source Amplifier (Resistive Load) - Large-signal transfer curve; Small-signal operation: Motivate small-signal model.
  • MOSFET Small-Signal Model - Transconductance, including backgate output resistance, capacitances.
  • Small-Signal Analysis - Body effect; PMOS model.
  • MOSFET Current Sources (and Sinks) - Diode-connected MOSFET as voltage source; Current mirror concept; Audio Digital-to-Analog Converter Example.
  • Two-Port Models - Four amplifier types: Voltage, current, trans-G, trans-R tests to find amplifier parameters.
  • Common-Drain Amplifier - Voltage gain, input and output resistances.
  • Common-Gate Amplifier - Current gain, input and output resistances.
  • Frequency Response, MOSFET ac Models - Transfer functions; Poles and zeroes; Bode plot techniques.
  • Frequency Response - Phasor analysis for sinusoidal steady-state signals; Bode plots.
  • Frequency Analysis, Second-Order Circuits
  • Second-Order Circuits, Amplifier Response - Unity gain frequency, gain-bandwidth product.
  • Frequency-Domain Analysis Insight & Approximations - Feedforward zero Miller approximation; Method of time constants.
  • Common Gate, Common Drain Frequency Response, Multi-Stage Amplifiers - Boostrapping of gate-source capacitance; Multi-stage amplifiers.
  • Multistage Amplifiers: The cascode - Two-port models; Current and voltage bias design; ac Analysis.
  • Forward-Biased pn Junction, Bipolar Junction Transistor - Modes of operation of a BJT.
  • Bipolar Junction Transistor - Principle of operation.
  • Bipolar Junction Transistor - Transistor action; Ebers-Moll model; Large-signal model.
  • Bipolar Junction Transistor (cont.) - Small-signal model; CE, CB, CC amplifiers; BJT versus MOSFET; Emitter degeneration.
  • Frequency Dependence of Input and Output Impedances - Frequency response of CC amplifier; figures of merit (gm/IC, fT).