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Re: AD734 Multiplier: Basic Circuit: ac simulation uses parameters from transient
You also need to realize that an .AC analysis is a small-signal linearized analysis. The multiplier, which is an inherently nonlinear device, is presumably linearized at the operating point, and
By Andy I · #64803 ·
Re: AD734 Multiplier: Basic Circuit: ac simulation uses parameters from transient
FYI ... after running an AC analysis, if you hover the mouse pointer over any net, look in the lower left corner where LTspice will tell you the DC operating point voltage on that net. Andy
By Andy I · #64802 ·
Re: AD734 Multiplier: Basic Circuit: ac simulation uses parameters from transient
Maren (distheo@...) wrote: a) Why is the .ac simulation influenced at all by the parameters of the In an .ac analysis, LTspice first needs to find the operating point. All voltage and current
By Andy I · #64801 ·
Re: Determining the value of a variable at time t-1
The idea I will give you is to open Help in LTspice; Then go to LTspice > Circuit Elements > B. Arbitrary Behavioral Voltage or Current Sources. Scroll down and find the first table of functions. Andy
By Andy I · #64800 ·
Re: Help! How do I do find maximum signal easily!
Macy wrote: I like the idea of 'including' the file with everything in it then I can Well, you've got a choice. You can either (1) keep everything on the schematic, or (2) move stuff off the schematic
By Andy I · #64799 ·
Re: Determining the value of a variable at time t-1
Look up the behavioral B source function, absdelay( x, t [, tnax] ) in the LTspice Help File. Howard
By Howard Hansen · #64798 ·
Re: Help! How do I do find maximum signal easily!
Hi Macy, If the SPICE directive is something like .step or .param, you can just right click. If the SPICE directive is something that the simulation GUI normally deals with, then the GUI pops up,
By David Hawkins · #64797 ·
Re: Help! How do I do find maximum signal easily!
now there are 'comments' on the schematic .ac dec 500 10 100k .noise V(out) Vsource dec 500 10 100k .ac LIST this goes forevers..... .noise V(out) Vsource LIST ditto..... [Thanks for suggesting LIST.
By Macy · #64796 ·
Re: Locked files
Yes, all the files are in the location you mention. I will copy everything to a desktop folder and then see if I can copy that. Thanks!
By jason.vanryan · #64795 ·
Re: 3722 Power Supply Problem
RL, Thank you for taking a look but I still have an issue. The bridge nodes that you renamed now disconnected the ZVS circuit of the chip because the nodes have been renamed to SWAB and SWCD the SWT
By viperlenny · #64794 ·
Re: Determining the value of a variable at time t-1
feabyl, Have you even thought of looking in the LTspice help file? Rick
By Rick · #64793 ·
Re: Determining the value of a variable at time t-1
What is the equation for behavioral source with 1 sec delay?
By feabyl · #64792 ·
AD734 Multiplier: Basic Circuit: ac simulation uses parameters from transient
Dear subscribers of the LTSpice-List, I uploaded the concerned Schematic and the model of AD734 to http://tech.groups.yahoo.com/group/LTspice/files/%20Temp/AD734%204-Quadrants-Multiplier%20/
By [email protected] <distheo@...> · #64791 ·
Re: Determining the value of a variable at time t-1
There is no inherent "time step" in LTspice. If you are thinking of a discrete-time system, then you need to add a "clock" (a pulse at some convenient frequency would work), and a sample/hold circuit.
By Jim Wagner · #64790 ·
Re: Determining the value of a variable at time t-1
Thank you for the options suggested.Could you give an idea how to implement 1 sec delay using B-element.
By feabyl · #64789 ·
Re: Locked schematic files will not copy
jason.vanryan <andrewc.russell@...> wrote: Hello, have not posted here for quite a while! > Didn't you post here just this morning? I have a number of schematic files that have a small lock icon
By Andy I · #64788 ·
Re: 3722 Power Supply Problem
There's nothing wrong with the model, as such, but there seems to be a couple of issues with the circuit that you're simulating. If you overcompensate it, you'll get a better idea about what is going
By boid_twitty · #64787 ·
Locked schematic files will not copy
Hello, have not posted here for quite a while! I have a number of schematic files that have a small lock icon just to the left of them when I display the files in a folder. When I select all the files
By jason.vanryan · #64786 ·
Re: inductance with a permeability in dependency of frequency
Andy, Nonlinear inductor work fine in the frequency domain. The first thing LTspice does for an .AC analysis is to find the DC operating point. Then any nonlinear devices are linearized at their
By Rick · #64785 ·
Re: Is it possible to link several symbols to the same package?
Hello Steve, You could name the opamps U4A, U4B, U4C, U4D and do some extra post-processing to modify the PCB-netlist. Maybe this earlier discussion will help. "pcb layout s/w for use with ltspice" It
By Helmut Sennewald · #64784 ·