SPICE Simulation Program with Integrated Circuit Emphasis Developed

SPICE Simulation Program with Integrated Circuit Emphasis –Developed in 1970’s at Berkeley –Many commercial versions are available –Used for simulating circuits

Examples of Types of Spice Simulations • Bias Point • DC Sweep • Parametric Sweep • Transient Analysis • AC sweep/Noise • Temperature • Monte Carlo • Also nested sweep

Bias Point and DC sweep Bias Point Results • Single Operating point Example Vin = 3 V DC Sweep Results • Output as a function of Vin Vo Example Vin = 0 to 3 V 3 V Vin

Transient Analysis t t t Input: Time varying input (ex. Sinusoidal waveform, digital clock) t Output: a function of time

The Basic Idea SPICE Deck Text file used for simulation Generate Spice Deck Schematic Entry Simulate

What is a SPICE Deck? * mosiv. sp *------------------------* Parameters and models *------------------------. include '. . /models/tsmc 180/models. sp'. temp 70 Comments. option post *------------------------* Simulation netlist *------------------------* R_R 1 R_R 2 R_R 3 V_V 2 VIN VOUT 2 K 0 VOUT 1 k 0 VOUT 3 K VIN 0 3 Vdc Netlist: Describes the connectivity of a circuit *------------------------* Stimulus *------------------------. dc V 2 0 3. 0 0. 05 Stimulus: Input signal. end

Understanding Netlists: SPICE Elements Letter R C L K V I M D Q W X E G H F Element Resistor Capacitor Inductor Mutual Inductor Independent voltage source Independent current source MOSFET Diode Bipolar transistor Lossy transmission line Subcircuit Voltage-controlled voltage source Voltage-controlled current source Current-controlled voltage source Current-controlled current source

Units Letter Unit Magnitude atto 10 -18 f fempto 10 -15 p pico 10 -12 n nano 10 -9 u micro 10 -6 m mili 10 -3 k kilo 103 X or Meg mega 106 g giga 109 a Ex: 3 K ohm resistor 3 K, 3 k, 3 e+3 Not case sensitive

Netlist R_R 1 VIN VOUT 2 K R_R 2 0 VOUT 1 k R_R 3 N 00218 VOUT 3 K R_R 4 0 N 00218 3 K V_V 2 VIN 0 3 Vdc