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SPICE Designs

Spice:  #'s - L      M - O      P - R      S - Z

 

Last Updated: November 21, 2017 05:45 AM


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

Inline equations offer hysteresis switch in PSpice -  08/16/01 EDN Design Ideas:  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.  Intusoft's (www __ Circuit Design by Christophe Basso, On Semiconductor, Toulouse, France

Input Bias Current -  (spice design)  __ Designed by Rick 

Input Offset Voltage -  (spice design)  __ Designed by Rick 

Instrumentation Amp (3 Op Amp) -  (spice design)  __ Designed by Rick 

Integrator -  (spice design)  __ Designed by Rick 

Inline equations offer hysteresis switch in PSpice -  08/16/01 EDN Design Ideas:  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.  Intusoft's (www __ Circuit Design by Christophe Basso, On Semiconductor, Toulouse, France

Input Bias Current -  (spice design)  __ Designed by Rick 

Input Offset Voltage -  (spice design)  __ Designed by Rick 

Instrumentation Amp (3 Op Amp) -  (spice design)  __ Designed by Rick 

Integrator -  (spice design)  __ Designed by Rick 

Intermediate Op Amp Model -  (spice design)  __ Designed by Rick 

Inverting Amplifier -  (spice design)  __ Designed by Rick 

Kick start a crystal oscillator in Spice -  05/27/99 EDN Design Ideas:  Starting up oscillator circuits and getting them to maintain oscillation in a Spice simulation is difficult.  Some high-frequency crystal circuits require days for the oscillation to reach steady state.  This PDF has several circuits, please scroll to find this one.    __ Circuit Design by Adam Chen, Cypress Semiconductor, Woodinville, WA

Limitations of SPICE! -  (spice design)  __ Designed by Rick 

Linearized NTC Thermistor -  (spice design)  __ Designed by Rick 

Linearizing an RTD is easy with Spice -  08/01/98 EDN Design Ideas:  (FILE has several circuit ideas.  Scroll to find this one.) A popular way to design an accurate temperature probe using an inherently nonlinear device--a resistance temperature detector (RTD) --uses positive multiplicative feedback.  However, the transfer function of this method is also nonlinear, making an analytical approach difficult.  A simpler method uses Spice to optimize the RTD's response by exciting the sensor with a particular waveform and performing simple signal processing on the circuit's output.   __ Circuit Design by Richard Faehnrich, Consultant, Arlington Heights, IL 

Low-Noise AC Amplifier has digital control of gain & bandwidth -  02/05/04 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- __ Circuit Design by Philip Karantzalis, Linear Technology App Note, Milpitas, CA,

LTspice -  LT Spice iV is a free spice 3 based simulator from Linear Technology.  Originally called Switchercad this simulator was used in analysing switched mode power supplies, but has the ability to work with transistors, FET's and IC 's and has become an invaluble tool for circuit simulation and schematic drafting.   __ Designed by Andy Collison

Model a nonideal transformer in Spice -  06/05/00 EDN Design Ideas:  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 provide as a modelPDF contains several designs, scroll to find this one __ Circuit Design by Vittorio Ricchiuti, Siemens ICN, L’Aquila, Italy

Model NTC Thermistor in SPICE -  SPIC E 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.   __ Designed by Jim Haggerman, Hagerman Technology LLC

Modification improves VCA's Spice simulation -  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.   __ Circuit Design by Alex Rysin, RVSI Acuity CiMatrix, Canton, MA

Multiple Feedback Band-pass Filter -  (spice design)  __ Designed by Rick 

Nodal Analysis -  (spice design)  __ Designed by Rick 

Noise Analysis-Resistor Example -  (spice design)  __ Designed by Rick 

Noninverting Amplifier -  This circuit differs from the voltage follower in only one respect: output voltage is "fed back" to the inverting (-) input through a voltage-dividing potentiometer rather than being directly connected.  With only a fraction of the output voltage fed back to the inverting input,  __ Designed by © EETech Media, LLC.

Non-Linear DC Analysis -  (spice design)  __ Designed by Rick 

NTC Thermistor Model -  (spice design)  __ Designed by Rick 

Op Amp Bandwidth -  (spice design)  __ Designed by Rick 

Op Amp based PID Controller with SPICE simulation -  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 into three individual op amp circuits.__ 

Op Amp Comparator with Hysteresis with SPICE simulation -  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) __ 

Op Amp Differentiator-Open Loop Analysis -  (spice design)  __ Designed by Rick 

Op Amp Feedback Analysis -  (spice design)  __ Designed by Rick 

Op Amp Input Voff & Ibias -  (spice design)  __ Designed by Rick 

Op Amp Limiter -  (spice design)  __ Designed by Rick 

Op Amp Macro-Models -  (spice design)  __ Designed by Rick 

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) __ 

Output Current Limiter -  (spice design)  __ Designed by Rick 

Output Current Limiting -  (spice design)  __ Designed by Rick 

Output Stage -  (spice design)  __ Designed by Rick 

Output Voltage Limiter -  (spice design)  __ Designed by Rick 

Output Voltage Limiting -  (spice design)  __ Designed by Rick 

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Spice:  #'s - L      M - O      P - R      S - Z


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