SPICE Designs, Page 1
Spice: #'s - C
D - R S - Z
Last Updated on:
Friday, October 16, 2009 03:43 AM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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2nd Gain Stage - Unfortunately, for particular combinations of slew-rate, first-pole
frequency and open-loop gains, the Intermediate Op Amp Model just can't handle it. The
spreadsheet coughs up a negative number for RE1 and RE2 making it impractical. So what's
...(spice design added 02/09) |
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A SPICE Compatible Macromodel for CMOS Operational Amplifiers - National Semiconductor
Application Note (app note added 2/06) |
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A SPICE Op Amp Macromodel for the LT1012 - DN28 Design Notes (Linear Technology) (app
note added 1/06) |
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Active Load in Gain Stage - Instead of a resistor at the transistor's collector, you
might have seen a current source (active component) substituted in an audio amp's gain
stage. Why go through the trouble of the added components? You'll find the active loading
of a current source packs ...(spice design added 02/09) |
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Advanced Audio Amplifier - This is roughly the minimum number of components that
represents the classic audio amplifier topology. You can clearly see the three stages
found in many audio amps (and op amps today). However, looking at actual audio designs,
you'll find the basic topology has been tweaked and enhanced in a few key
locations....(spice design added 02/09) |
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Algorithm Overview - Regardless if you have a great or small interest in understanding
how SPICE works, its a good idea to get a basic grasp of it. Why? For the same reason it
helps to have basic understanding of how your car works - when things go wrong....(spice
design added 02/09) |
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An LT1013 and LT1014 Op Amp SPICE Macromodel - DN12 Design Notes (Linear Technology)
(app note added 1/06) |
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An OrCAD PSPICE Library for the VIP10 High-Speed Op Amp - National Semiconductor
Application Note (app note added 2/06) |
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AN-117: OP-42 Advanced SPICE Macro-Model - AN-117 Analog Devices Application Notes
(app note added 6/06) |
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AN-120: OP400 SPICE Macro-Model - AN-120 Analog Devices Application Notes (app note
added 6/06) |
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AN-1255: An OrCAD PSPICE Library for the VIP10 High-Speed Op Amp - National
Semiconductor Application Note (app note added 2/06) |
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AN-132: OP470 SPICE Macro-Model - AN-132 Analog Devices Application Notes (app note
added 6/06) |
| AN-138: SPICE-Compatible Op Amp Macro-Models - AN-138
Analog Devices Application Notes (app note added 6/06) |
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AN23 Zetex SPICE Models: Understanding Model Parameters and Applications Limitations -
Zetec Semiconductors Applications Notes This report describes basic Gummel-Poon model as
used as a basis for analog circuit simulations. An overview of model parameters and ir
derivation, as well as guidelines for model manipulation for specific cases are also
included. A number of typical application circuits are suggested with resultant SPICE
predictions of operation. (app note added 2/06) |
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AN-840: Development of an Extensive SPICE Macromodel for 'Current-Feedback' Amplifiers
- National Semiconductor Application Note (app note added 2/06) |
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AN-856: A SPICE Compatible Macromodel for CMOS Operational Amplifiers - National
Semiconductor Application Note (app note added 2/06) |
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Analog Behavioral Modeling - In the good old days, to model a simple LOG function, you
reached for a diode from the SPICE tool shed and embarked on synthesizing the log
function. More complex functions snared you deeper into math and device theory. You spent
more time developing and debugging the math function ...(spice design added 02/09) |
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Analyze LED characteristics with PSPICE - 01/18/01 EDN Design Ideas / (addes 08/05)
Recent advances in LED technology have lead to LEDs' widespread use in outdoor-signal
applications, such as in traffic and railroad signals. A typical LED signal consists of an
LED array and a power supply. When a low-voltage power supply is eir desirable or
mandatory,.... |
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Apex-AN33 Spice Model and PWM Amplifier Applications - 6/2007, AN33UREVB : 435 Kb
(Apex App Note added 08/08/08) |
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Audio Tone Controls - Many people at one time or other, regardless of their interest
in electronics, have adjusted these controls to suit their preference. Whether its to
boost the bass of their favorite CD, cut the noise / static on a talk radio station or
compensate for poor loud speaker response, they've reached for the treble and bass tone
controls. The ni....(circuit diagram added 02/09) |
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Basic Audio Amplifier - ...(spice design added 02/09) |
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Basic Digital Gates - You're simulating a circuit, it requires several digital gates,
but you don't have a mixed-mode simulator. What to do? One solution involves creating
simplified versions of the logic functions. To do this, we look to the NMOS transistor
implementation of logic gates where the transistor acts like a voltage-controlled switch.
But, instead of the transistor, we'll use the SPICE switch....(design added 02/09) |
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Basic Op Amp Model - One of the challenges of simulating opamp circuits is modeling
the op amp itself. How is that accomplished? There's a couple of ways. You can create a
circuit of many transistors, resistors and caps that closely replicate the internals of an
op amp...(spice design added 02/09) |
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Behavioral SPICE model emulates VCO - (07/06/95 EDN-Design Ideas / (added 6/06) A
behavioral model treats a circuit as a black box, which you can describe using an equation
or table. Listing 1 is a Microsim PSpice behavioral model that simulates the operation of
a voltage-controlled oscillator (VCO). The output signal of a VCO is VO=Aβsin(2ãfOt),
where A is the amplitude, t is the time variable.... |
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BJT Current Source - ...(spice design added 02/09) |
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Buck Converter - AC Model - We've already developed a SPICE model for the Buck
Converter in a voltage control loop. The controller performed brilliantly holding the
output steady under varying load conditions. However, closing the loop is fraught with
danger! Without proper insight, Vo can start ringing and oscillating out of
control...(spice design added 02/09) |
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Capacitor Model - Ideal capacitors exist only in textbooks, not on real circuit
boards. You may be surprised to find that all practical capacitors look (behave) similarly
to the series RLC network shown above. Whether you're designing a filter or picking bypass
capacitors, you'll need ...(spice design added 02/09) |
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Circuit Protects FPGAs from killer SPICEs - 04/23/98 EDN-Design Ideas / (added
6/06) [Note: File contains many circuits, scroll to find this one] A project using Xilinx
FPGAs brought an interesting problem to light. When you turn on the board, one FPGA in
three succumbs to this problem. A lot of frustration and testing uncovered a
negative-going spike (Figure 1) in the 5V.... |
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Common Emitter Transistor Amplifier - Here’s a classic circuit that’s still an
essential building block of circuits today, both IC and discrete...(spice design added
02/09) |
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Common-Mode Rejection - While real op amps do a fantastic job of rejecting voltages
common to both inputs - it's not perfect. A small output results from a change in input
common-mode voltage. What causes this output? Due to mismatching in the transistors and
resistors of the input stage, the common-mode voltage produces a small differential error
voltage at the input terminals. Subsequently...(spice design added 02/09) |
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Compare SPICE simulation to graphical template - 11/23/95 EDN-Design Ideas / (added
2/06) |
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Component Tolerances - Part I - ...(spice design added 02/09) |
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Component Tolerances - Part II - ...(spice design added 02/09) |
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Current Source - Getting optimum performance in certain applications requires that
some components - sensors, DC motors, transistors - be driven or biased by a constant
current. We're mostly familiar with voltage regulators and their ability to maintain a
constant voltage under varying current conditions. In this application, your challenge is
to provide a constant ...(spice design added 02/09) |
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#'s - C D - R
S - Z |
