SPICE designs, page 2

SPICE Designs, Page 2
Spice: #'s - C D - R S - Z
Last Updated on: Friday, March 12, 2010 12:07 PM

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

DC Motor Model - Although SPICE does not provide explicit models for electro-mechanical devices, like a DC motor, creating one is fairly straightforward. You just need to remember that most physical behaviors, whether mechanical or electrical, can be described by a set of equations. So for a desired ...(spice design added 02/09)

Delay line aids in one shot simulations - 02/05/2004 EDN-Design Ideas In low-noise analog circuits, a high-gain amplifier serves at the input to increase the SNR. The input signal level determines the input-stage gain; low-level signals require the highest gain. It is also standard practice in low-noise analog-signal processing to make the circuit's bandwidth as narrow as possible to pass only the useful input-signal spectrum. (added 10/05)

Delay Line Eases SPICE Dead Time Generation - (Design Ideas - EDN, 03/02/2000) Generating complementary clock signals in a Spice simulation is an easy task. However, this task gets much harder if you need to introduce some dead time into the signals. This difficulty is especially true when you're dealing with a variable-pulse-width-modulated switching cycle. (electronic design idea added 2/06)

Design for test - 02/05/2004 EDN-Design Ideas In low-noise analog circuits, a high-gain amplifier serves at the input to increase the SNR. The input signal level determines the input-stage gain; low-level signals require the highest gain. It is also standard practice in low-noise analog-signal processing to make the circuit's bandwidth as narrow as possible to pass only the useful input-signal spectrum. (added 10/05)

Development of an Extensive SPICE Macromodel for 'Current-Feedback' Amplifiers - National Semiconductor Application Note (app note added 2/06)

Diff Amp with Current Mirror - In an audio input differential stage, you often see the simple collector resistor replaced with a current mirror. Why bother? The payoff is two fold. First, you get twice the gain and current output, typically a good thing for an audio amp. And second...(spice design added 02/09)

Differential Amplifier - ...(spice design added 02/09)

Differential to Differential - ...(spice design added 02/09)

Differential to Single-Ended - ...(spice design added 02/09)

Differentiator - ...(spice design added 02/09)

Digital Filter Makes Simple SPICE Eliminator - 04/10/97 EDN-Design Ideas / (added 6/06)

Driving a Capacitive Load - You've been warned! Do not attempt to drive large capacitances with your op amp - severe overshoot and ringing may occur. But what if you're stuck driving a length of coax cable that's unterminated? You could end up with over 1000 pF that sends the output ringing. What causes this behavior? Unfortunately...(spice design added 02/09)

Filter Makes Simple SPICE Eliminator - 04/10/97 EDN-Design Ideas / (added 6/06)

Frequency Shaping Stages - ...(spice design added 02/09)

Fully Differential Amplifier - ...(spice design added 02/09)

H-Bridge Power Amp - ...(spice design added 02/09)

How to Quickly Obtain Spice Data - MicoNote 10 from Microsemi (app note added 6/06)

Inline equations offer hysteresis Switch in PSPICE - 08/16/01 EDN Design Ideas / (added 11/05) Smooth-transition switches are convenient devices in many Spice-based simulators. Their action can greatly ease the convergence process. Unfortunately, these devices lack inherent hysteresis, a helpful feature used to build UVLO (undervoltage-lockout) systems, oscillators, and other systems.

Input Bias Current - ...(spice design added 02/09)

Input Offset Voltage - ...(spice design added 02/09)

Instrumentation Amp (3 Op Amp) - ...(spice design added 02/09)

Integrator - ...(spice design added 05/09)

Intermediate Op Amp Model - ...(spice design added 02/09)

Inverting Amplifier - ...(spice design added 02/09)

Kick start a crystal oscillator in SPICE - 02/05/2004 EDN-Design Ideas In low-noise analog circuits, a high-gain amplifier serves at the input to increase the SNR. The input signal level determines the input-stage gain; low-level signals require the highest gain. It is also standard practice in low-noise analog-signal processing to make the circuit's bandwidth ....(added 6/06)

Limitations of SPICE! - ...(spice design added 02/09)

Linearized NTC Thermistor - ...(spice design added 02/09)

Linearizing an RTD is easy with SPICE - 08/03/98 EDN-Design Ideas / (added 11/05)

Model a nonideal transformer in SPICE - (Design Ideas - EDN, 06/05/2000) Designers often use transformers as voltage, current, and impedance adapters. Transformers usually comprise two inductively coupled coils, wound around a ferrite core. The coupling between the windings is never perfect. Spice provides a model( Figure 1a ) of the coupled inductors using the k parameter, which is the coefficient of coupling between the windings. (electronic design idea added10/05)

Model NTC Thermistor in SPICE - Electronic Design 3/14/91 SPICE subcircuit accurately models NTC thermistor. Model uses the .TNOM statement to set temperature. This allows circuits with transistors and diodes to be analyzed over temperature. (added 9/04)

Modification improves VCA's Spice simulation - (Design Ideas - EDN, 09/01/2000) The Burr-Brown VCA610 is a good wideband voltage-controlled amplifier(VCA) that you can use successfully for your application. The Spice model from Burr-Brown simulates normally when the VCA uses dual power supplies. (electronic design idea added apr 2002)

Multiple Feedback Band-pass Filter - ...(spice design added 02/09)

Nodal Analysis - ...(spice design added 02/09)

Noise Analysis - Resistor Example - ...(spice design added 02/09)

Non-Inverting Amplifier - ...(spice design added 02/09)

Non-Linear DC Analysis - ...(spice design added 02/09)

NTC Thermistor Model - ...(spice design added 02/09)

Oa-18: Oa-18 Simulation SPICE Models for Comlinear's Op Amps - National Semiconductor Application Note (app note added 6/06)

Op Amp Bandwidth - ...(spice design added 02/09)

Op Amp Comparator with Hysteresis - The challenge sounds simple enough - take a 60 Hz (or 50 Hz) sinewave from the AC power line and convert it to a square wave. This signal will serve as a clock to drive counters for a 24 hour time clock. So you hook up an op amp as a comparator to do the job. But your surprised to see the clock running too fast! With oscilloscope in hand you discover the AC line is noisy! And to your horror, you see glitches ...(spice design added 02/09)

Op Amp Differentiator - Open Loop Analysis - ...(spice design added 02/09)

Op Amp Feedback Analysis - ...(spice design added 02/09)

Op Amp Input Voff and Ibias - ...(spice design added 02/09)

Op Amp Limiter - ...(spice design added 02/09)

Op Amp Macro-Models - ...(spice design added 02/09)

Op Amp PID Controller - We've all heard about the wonders of the PID controller, bringing a system's output - temperature, velocity, light - to its desired set point quickly and accurately. But now, your boss says okay, design one for us. Although there's a number of ways to do it, the circuit above nicely separates the three terms ...(spice design added 02/09)

OP400 SPICE Macro-Model - AN-120 Analog Devices Application Notes (app note added 6/06)

OP-42 Advanced SPICE Macro-Model - AN-117 Analog Devices Application Notes (app note added 6/06)

OP470 SPICE Macro-Model - AN-132 Analog Devices Application Notes (app note added 6/06)

Output Current Limiter - ...(spice design added 02/09)

Output Current Limiting - ...(spice design added 02/09)

Output Stage - ...(spice design added 02/09)

Output Voltage Limiter - ...(spice design added 02/09)

Output Voltage Limiting - ...(spice design added 02/09)

Potentiometer Model - ...(spice design added 02/09)

Power Supply Bypassing - ...(spice design added 02/09)

Precision Half-Wave Rectifier - ...(spice design added 02/09)

Programmable Gain Amplifier (PGA) Op Amp - The task at hand seems straightforward: read all of the system's sensors - thermistors, strain gauges, photodiodes - using a 12-bit ADC. But getting the most from an ADC means scaling the maximum signal from each sensor to match the maximum input of the ADC. How do you achieve this from sensors of vastly different signal strengths? One indispensable circuit is the PGA - Programmable Gain Amplifier....(spice design added 02/09)

PSPICE models nickel metal hydride cells - 02/02/02/95 EDN-Design Ideas / (added 11/05)

PSPICE tunes oscillator circuits - 10/09/97 EDN-Design Ideas / (added 11/05)

Pulse Width Modulation - ...(spice design added 02/09)

Push-Pull Output Stage - ...(spice design added 02/09)

Questions and Answers on the SPICE Macromodel Library - AN41 Linear Technology This note provides answers to some of the more common questions concerning LTC's Macromodel Library. Topics include hardware and software requirements, model characteristics, and limitations and interpretation of results.

RC Low-Pass Filter - ...(spice design added 02/09)

Routine implements SPICE 3 inductor mode - 09/01/95 EDN-Design Ideas / (added 11/05)

Spice: #'s - C D - R S - Z