Differences

This shows you the differences between two versions of the page.

--- supp:ltspice:start [2015/11/24 18:32] – [Selected Topics] admin
+++ supp:ltspice:start [2023/12/12 06:30] (current) – [Manuals and Tutorials] rolf
@@ Line 1: / Line 1: @@
+~~NOTOC~~
 ====== LTSpice Circuit Simulator ======
@@ Line 6: / Line 7: @@
-  * :-) [[http://ltwiki.org/files/LTspice_guide.pdf|Short but effective guide]] to LTspice at [[http://ltwiki.org/|ltwiki.org]]
+  - :-) [[http://ltwiki.org/files/LTspice_guide.pdf|Short but effective guide]] to LTspice at [[http://ltwiki.org/|ltwiki.org]]
+  - :-) {{:et:scad3.pdf|Switcher CAD 3 manual}}, the last __official manual__ by Linear Technology of the LTSpice IV predecessor. Mostly used as reference.
+  - :-) {{http://www.gunthard-kraus.de/LTSwitcherCAD/SwitcherCAD-Tutorial_English/pdf-File/LTspice_4_e2.pdf|Great tutorial}} by Gunthard Kraus (part 1),  e.g. lossy transmission lines, S-parameters, filters, ...
+  - {{http://www.gunthard-kraus.de/LTSwitcherCAD/SwitcherCAD-Tutorial_English/pdf-File/RF_English_01_final.pdf|RF Special Edition: Complete Simulation of a 137MHz Weather Satellite Converter using LTspice IV}} by Gunthard Kraus (part 2)
+  - {{https://www.analog.com/media/en/simulation-models/spice-models/ltspicegettingstartedguide.pdf|LTspice IV Getting Started Guide}}, presentation
+  - [[http://ltwiki.org/?title=Undocumented_LTspice|Undocumented LTspice]]
+  - {{http://eecs.oregonstate.edu/education/docs/tutorials/Simulating%20an%20op%20amp.pdf|Simulating Ideal Opamp}}
+  - [[http://ltwiki.org/?title=SPICE_and_LTspice_Courseware_and_Tutorials|LTwiki: Courseware and Tutorials]]
+  - {{https://www.analog.com/media/en/news-marketing-collateral/solutions-bulletins-brochures/ltspice_shortcutflyer.pdf|LTspice Shortcut Flyer}}
-  * :-) {{:et:scad3.pdf|Switcher CAD 3 manual}}, the last __official manual__ by Linear Technology of the LTSpice IV predecessor. Mostly used as reference.
+===== Selected Topics =====
-  * :-) [[http://www.gunthard-kraus.de/LTSwitcherCAD/SwitcherCAD-Tutorial_English/pdf-File/LTspice_4_e2.pdf|Great tutorial]] by Gunthard Kraus, e.g. lossy transmission lines, S-parameters, filters, ...
+==== Voltage Controlled Switch ====
-  * [[http://www.gunthard-kraus.de/LTSwitcherCAD/SwitcherCAD-Tutorial_English/pdf-File/RF_English_01_final.pdf|RF Special Edition: Complete Simulation of a 137MHz Weather Satellite Converter using LTspice IV]] by Gunthard Kraus
+  * [[https://youtu.be/eEHWxvCydpw|LTSpice - Voltage Controlled Switch]] (youtube video)
-  * [[http://cds.linear.com/docs/en/ltspice/LTspiceGettingStartedGuide.pdf|Tspice IV Getting Started Guide]], Linear Technology presentation
+==== Parameter Sweep ====
+A short tutorial is the {{:supp:ltspice:ltspice_parameter_sweep_tutorial_v02.pdf|LTSpice Parameter Sweep Tutorial}} by Andrew Herdrich, Department of Electrical and Computer Engineering, Portland State University, January 7, 2007, Version 2. The examples below are taken from that tutorial.
-  * [[http://ltwiki.org/?title=Undocumented_LTspice|Undocumented LTspice]]
+Parameters and parameter sweep are defined by directives (commands starting with at dot).
-  * [[http://eecs.oregonstate.edu/education/docs/tutorials/Simulating%20an%20op%20amp.pdf|Simulating Ideal Opamp]] (pdf)
+Constant parameter:
-  * [[http://ltwiki.org/?title=SPICE_and_LTspice_Courseware_and_Tutorials|LTwiki: Courseware and Tutorials]]
+  .param C=1uF
-===== Selected Topics =====
+Common loop expression, e.g. to test capacitors from 1μF to 10μF in 2μF steps:
-==== Voltage Controlled Switch ====
+  .step param C 1uF 10uF 2uF
-  * [[https://youtu.be/eEHWxvCydpw|LTSpice - Voltage Controlled Switch]] (youtube video)
+Parameters from a list:
-==== Parameter Sweep ====
+  .step param C list 0.47uF 1uF 2.2uF 10uF
-  * {{:supp:ltspice:ltspice_parameter_sweep_tutorial_v02.pdf|LTSpice Parameter Sweep Tutorial}} Andrew Herdrich, Department of Electrical and Computer Engineering, Portland State University
+Logarithmic (common log, base 10) parameter variation, e.g. 8 steps from 100nF to 1uF:
-January 7, 2007, Version 2
+  .step dec param C 100nF 1uF 8
+==== AC Sweep (Creates Bode Plot) ====
-Common loop expressions:
+logarithmic (base 10) AC sweep from 1 Hz to 100kHz with 10 steps per decade:
+  .ac dec 10 1 100k