new
Quick Intro to the Basic Op Amp SPICE Model
Op Amp Max Slew Rate
Add 2nd and 3rd Poles - Improved Response
 
OP AMP APPLICATIONS
Function Generator - Part 1
Function Generator - Part 2
Programmable Gain Amplifier (PGA)
Op Amp Triangle Wave Generator  
RC Low-Pass Filter with Op Amp Buffer (Single-Pole)
Sallen-Key Low-Pass Filter (Double-Pole)
Op Amp Comparator with Hysteresis
Op Amp PID Controller  
Single-Supply AC Inverting Amplifier
H-Bridge Power Amp
Wien Bridge Oscillator
Current Source
Precision Half-Wave Rectifier  
Op Amp Limiter 
 
OP AMP BASICS
Inverting Amplifier
Non-Inverting Amplifier
Differential Amplifier
Integrator
Differentiator 
Summing Amplifier
Quick Intro to the Basic Op Amp SPICE Model 
Create Waveforms with the Summing Amplifier
I-to-V (Transimpedance) Amplifier
I-to-V Amp with Offset 
Basic Op Amp SPICE Model
Input Offset Voltage  
Input Offset Voltage Adjustment  
Input Bias Current
 
OP AMP ADVANCED
Op Amp Bandwidth
Op Amp Max Slew Rate      new!
Op Amp with Gain Resistor Errors  
Op Amp Feedback Analysis 
Driving a Capacitive Load
Op Amp Differentiator - Open Loop Analysis 
I-to-V Amp Stabilty
 
GENERAL CIRCUITS & MODELS
The 555 Timer 
Analog Behavioral Modeling
Basic Digital Gates  
DC Motor Model
Common Emitter Transistor Amplifier
Voltage Regulator w/ Series-Pass Transistor
Push-Pull Output Stage 
Transistor Differential Amplifier
Voltage-Controlled Resistor
Potentiometer Model
Capacitor Model 
The Miller Effect
 
SWITCH-MODE POWER SUPPLIES
SMPS Basics - The Buck Converter
SMPS Power Loss 
Buck Converter - Voltage Mode Control
Buck Converter - AC Model
Buck Converter - Compensation
SPICE Power Meter  
 
SWITCHED-CAPACITOR CIRCUITS
Switched-Capacitor Resistor  
Switched-Capacitor Integrator 
 
AUDIO AMPLIFIERS
Basic Audio Amplifier
Advanced Audio Amplifier
Diff Amp with Current Mirror 
Output Stage
The Miller Integrator 
Simplified Audio Amp Model
BJT Current Source  
Active Load in Gain Stage
 
EXCEL (VBA) TOPICS
VBA Basics
Resistor Divider
Sine Wave Generator
Triangle Wave Generator
Calculate Op_Amp_Gain_BW
ADC Function
Create Waveforms with the Fourier Series
 
Using the Circuit Collection
Here’s a growing source of circuits from today’s application notes, data sheets and textbooks. Use the collection anyway that works for you:
1. Download the SPICE file and off you go! Simulate, modify, expand it any way you like.
2. Read the circuit notes for a brief tour of how it works along with some hands-on design and analysis. Like a buffet table take as little or as much as you need.
3. Simulate your own circuits. Find a circuit similar to your interest. Then, modify it to fit your needs.
 
DESIGN TOPICS
Sampling Theory 
Pulse Width Modulation 
The PID Controller
Component Tolerances - Part I 
Component Tolerances - Part II
Noise Analysis - Resistor Example 
Power Supply Bypassing 
Transmission Line Terminations
 
ADC INPUT DRIVERS
Single-Ended to Single-Ended
Differential to Single-Ended 
Single-Ended to Differential
Differential to Differential 
Fully Differential Amplifier 
 
FILTERS
Audio Tone Controls  
Multiple Feedback Band-pass Filter
Simple RC Low-Pass Filter
RC Low-Pass Filter with Op Amp Buffer (Single-Pole)
Sallen-Key Low-Pass Filter (Double-Pole)
 
SENSORS & INSTRUMENTATION
Sensor Bridge
Sensor Bridge with Current Bias
Instrumentation Amp (3 Op Amp)
NTC Thermistor Model
Linearized NTC Thermistor 
Thermistor Preamp 
Thermocouple Model
Thermocouple Preamp
 
OP AMP MODELS
Op Amp Macro-Models
Basic Op Amp Model 
Intermediate Op Amp Model
     Advanced Functions
2nd Gain Stage  
Frequency Shaping Stages
Output Voltage Limiting Output Current Limiting 
Supply Correction Current
Common-Mode Rejection 
Op Amp Input Voff and Ibias
Add 2nd and 3rd Poles - Improved Response      new!
     Easy to Use Functions 
Slew Rate Using LIMIT 
Slew Rate Using TANH 
Output Voltage Limiter 
Output Current Limiter
 
SPICE TOPICS
A Brief History of SPICE
Why Simulate? 
Limitations of SPICE!
 
THE SPICE ALGORITHM
Take a look inside the SPICE engine.   How it works...
Nodal Analysis 
Non-Linear DC Analysis
Transient Analysis  
Algorithm Overview