It is from Circuit Maker or latter Altium:
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://wiki.bu.ost.ch/infoportal/_media/hardware/altium_designer/tr0113_simulation_models_and_analyses_reference.pdf

page 250

Thanks.
I need square wave vco for PLL tests. Currently I am using:

V=u(sin(2*pi*(fc*time+df*idt(V(m)))))

It can be dome in many ways wit B sources, although I am not sure how to add FM:

?

Triangle wave with period 1/fc:

V=fc* idtmod(1,0,1/fc)

?

Square wave with period 1/fc:

V=u(fc* idtmod(1,0,1/fc) - 0.5)

?

Staircase with period 1/fc:

V= floor(time*fc)

But as I remember in the good old Circuit Maker there was square/triangle vco, latter adopted by Altium.
I thought I could use it with LTSpice.

On Tue, May 14, 2024 at 07:56 PM, <bb_petrov@...> wrote:

Too few nodes: A1 %vd(1,2) %vd(3,4) ASQRVCO

Just curious: I know such error messages from XSPICE. Are you
mistakingly invoking ngspice (or KiCAD) somewhere in the chain?

-marcel

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I'm struggling to understand what you are trying to do with:

.MODEL ASQRVCO...

AFAIK, you can only define .models as being these types of LTspice primitives:

C, R, L, D, SW, CSW, URC, LTRA, NPN, PNP, NJF, PJF, NMOS, PMOS, NMF, PMF, NIGBT, PIGBT, VDMOS

See: Help > LTspice XVII > LTspice? > Dot Commands > .MODEL

--

Of course the model is in a circuit

* C:\Users\BoyanP\Documents\srt_marine\EP1_HH_eval\PLL\sim\pll_avg_mod\Draft3.asc
V1 N001 0 SINE(2.5 2.5 100)
XU1 N001 0 N002 0 SQRVCO C1=0 C2=1 C3=2 C4=3 C5=4 F1=0 F2=1k F3=2k F4=3k F5=4k LOW=0 HIGH=5 CYCLE=0.5 RISE=1u FALL=1u
.tran 130m
.lib C:\Users\BoyanP\Documents\LTspiceXVII\lib\sym\AutoGenerated\sqrvco.sub
.backanno
.end

Just a voltage source and autogenerated symbol.

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It won't run my itself. It needs to be included in a schematic with specifications of parameters (the symbols in { }).

Hello, I need little help, please. I am trying to run old square wave vco model:

*Voltage Controlled Square Wave Oscillator?
*LOW ? = Peak output low value?
*HIGH ?= Peak output high value *CYCLE = Duty cycle ?
*RISE ?= Rise time *FALL ?= Fall time?
*C1 ? ?= Input control voltage point 1?
*C2 ? ?= Input control voltage point 2?
*C3 ? ?= Input control voltage point 3?
*C4 ? ?= Input control voltage point 4?
*C5 ? ?= Input control voltage point 5?
*F1 ? ?= Output frequency point 1?
*F2 ? ?= Output frequency point 2?
*F3 ? ?= Output frequency point 3?
*F4 ? ?= Output frequency point 4?
*F5 ? ?= Output frequency point 5?
* Connections:?
* ? ? ? ? ? ? ?In+?
* ? ? ? ? ? ? ?| In-?
* ? ? ? ? ? ? ?| | Out+?
* ? ? ? ? ? ? ?| | | Out-?
* ? ? ? ? ? ? ?| | | |?
.SUBCKT SQRVCO 1 2 3 4 PARAMS: C1=0 C2=1 C3=2 C4=3 C5=4 F1=0 F2=1k ?
+ F3=2k F4=3k F5=4k LOW=0 HIGH=5 CYCLE=0.5 RISE=1u FALL=1u?
A1 %vd(1,2) %vd(3,4) ASQRVCO?
.MODEL ASQRVCO square(cntl_array=[{C1} {C2} {C3} {C4} {C5}]?
+ freq_array=[{F1} {F2} {F3} {F4} {F5}] out_low={LOW}?
+ out_high={HIGH} duty_cycle={CYCLE} rise_time={RISE} fall_time={FALL})?
.ENDS SQRVCO

The error is:
Too few nodes: A1 %vd(1,2) %vd(3,4) ASQRVCO?
What I am doing wrong?
Thank you.

Hello, I need little help, please. I am trying to run old square wave vco model:

*Voltage Controlled Square Wave Oscillator?
*LOW ? = Peak output low value?
*HIGH ?= Peak output high value *CYCLE = Duty cycle ?
*RISE ?= Rise time *FALL ?= Fall time?
*C1 ? ?= Input control voltage point 1?
*C2 ? ?= Input control voltage point 2?
*C3 ? ?= Input control voltage point 3?
*C4 ? ?= Input control voltage point 4?
*C5 ? ?= Input control voltage point 5?
*F1 ? ?= Output frequency point 1?
*F2 ? ?= Output frequency point 2?
*F3 ? ?= Output frequency point 3?
*F4 ? ?= Output frequency point 4?
*F5 ? ?= Output frequency point 5?
* Connections:?
* ? ? ? ? ? ? ?In+?
* ? ? ? ? ? ? ?| In-?
* ? ? ? ? ? ? ?| | Out+?
* ? ? ? ? ? ? ?| | | Out-?
* ? ? ? ? ? ? ?| | | |?
.SUBCKT SQRVCO 1 2 3 4 PARAMS: C1=0 C2=1 C3=2 C4=3 C5=4 F1=0 F2=1k ?
+ F3=2k F4=3k F5=4k LOW=0 HIGH=5 CYCLE=0.5 RISE=1u FALL=1u?
A1 %vd(1,2) %vd(3,4) ASQRVCO?
.MODEL ASQRVCO square(cntl_array=[{C1} {C2} {C3} {C4} {C5}]?
+ freq_array=[{F1} {F2} {F3} {F4} {F5}] out_low={LOW}?
+ out_high={HIGH} duty_cycle={CYCLE} rise_time={RISE} fall_time={FALL})?
.ENDS SQRVCO

The error is:
Too few nodes: A1 %vd(1,2) %vd(3,4) ASQRVCO?
What I am doing wrong?
Thank you.

On Tue, May 14, 2024 at 03:53 PM, Tony Casey wrote:

...The first thing to do, is open the symbol in the symbol editor. Then, press ctrl-A, to open the Attribute Editor.

At the bottom, is the "ModelFile" Attribute. It will have the full path to the model file in it's current location. Delete that.

Then, save the edited symbol somewhere else - wherever it's used, is a good start. (Later, you might figure out a system for keeping custom symbols.)

In schematics where you place the new symbol, you should add a ".lib modelfile.sub" directive, where "modelfile.sub" is its actual name.

Keeping symbols and models with the schematics that use them is the best way of assuring portability.

?

--

Regards,

Tony?

?

I am trouble with this right at this moment.

I am not sure where to put the .lib files. On the previous install, it seemed to be wanting them in the .lib main folder.
And, the next issue now on a new install of v17, it is looking for them in the Autogenerated folder.

The error message is:
Could not open
'%HOMEPATH%\Documents\LtSpiceXVII\lib\sym\Autogenerated\INA826.lib



On this new install however, it puts the libs into c:\\username\AppData\Local\LTspice\lib\lib\Autogenerated

Are all the previously created symbols now useless unless each one is edited manually between machines?

I am also stumped that the default lib top folder is not selectable for LTSpice. That seems crazy.

Best regards
Bernt

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And be sure that the llibrary/model/subcircuit file is in the same directory [folder] as the schematic file.

Donald.

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In that path, delete all except the filename and its extension.

Hello,

The problem: Moving .asc schematics with Autogenerated symbols between different computers stops them working.
The .lib files are not in the same path and can not be located
It appears the symbol files store an absolute patch for the .lib file but this path depends on the computer username and the LTXSpice installation.

I tried to convert them to relative paths manually by could not get that to work.
What would be the correct way to fix this problem?

Best regards
Bernt

Hello,

The problem: Moving .asc schematics with Autogenerated symbols between different computers stops them working.
The .lib files are not in the same path and can not be located
It appears the symbol files store an absolute patch for the .lib file but this path depends on the computer username and the LTXSpice installation.

I tried to convert them to relative paths manually by could not get that to work.
What would be the correct way to fix this problem?

Best regards
Bernt

Hi Andy,

Thank you for your thorough review of my file. Your comments also helped me understand the problem. I will be able to finish my thesis now!?

Elien

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Hello Andy , sorry for misunderstanding. I will try to make my self more clearly
Yhe resistor is an rf transistor ,according figure 12 in the datasheet it needs to be Vds=45V and Ids=15A so the equivalent rds=3Ohm.

I need to bias two such transistors so 3||3=1.5 equivalent load.
As described in the photo below,The floating voltage opens M1 mosfet ,the current from M1 goes into two CGHV1A250F GAN M4 and M5 transistors(which i dont have their spice model) so i used 3||3=1.5.

M4 and M5 will be used to amplify RF signal.

If i put GND to the VSS of UCC5304 then i will have GND on the drain of my M4 and M5 then i would not be able to open them.

This is the LTSPICE riddle , how can i put VSS=GND? it will totally disable my options to open M4 and M5 later.

Maybe i am missign something in the logic of connecting the UCC5304 to the M1 ?
Thanks.



/g/LTspice/photo/294810/3782678?p=Created%2C%2C%2C20%2C2%2C0%2C0

john23 wrote, "how can i solve this LTspice riddle?"

What is the riddle?

In real life, the UCC5304's VSS pin should connect to the same "return" voltage that is for the MOSFET, which is probably also the bottom end of the 1.5 ohm resistor.? That is one way you can make sure that your UCC5304 drives a voltage to the MOSFET gate that the MOSFET can understand.

In SPICE simulations, the UCC5304's VCC pin needs to have a DC path to SPICE ground.? You can get that by grounding its VCC pin, or its VDD pin, or even its VOUT pin.? Or by grounding one of those pins through a resistor.

Since your MOSFET power source (V4 or V5) is connected to SPICE ground, then you should also connect the UCC5304's VCC pin to SPICE ground, and its VDD power source should be referenced to the same ground (which it already is).

Why did you name the MOSFET's Source pin "vss"?? That does not look right, but I guess that is one way you could do it.

Andy

Hello Andy,In real life i use the ucc5304 to do a floating voltage for SQ3426EV

In real life i cannot put Vss into ground, Its a floating? voltage between out and Vss.
the floating voltage goes into the gate and source of the mosfet (datasheet shown below).

the current which goes into the open mosfter afterwards flows into two rf transistors (which is represented as 1.5Ohms load)

If i put Vss=GND my load rf transistor could not be biased. Its drain will be gnd and could not be opened.
As shown in the LTspice photo below.
how can i solve this LTspice riddle?
Thanks.

/g/LTspice/photo/294810/3782670?p=Created%2C%2C%2C20%2C2%2C0%2C0

https://www.mouser.co.il/ProductDetail/Vishay-Semiconductors/SQ3426EV-T1_GE3?qs=Vcr9%2FL0R50i4QZtXcIuK7w%3D%3D&utm_id=20109199406&gad_source=1&gclid=CjwKCAjwl4yyBhAgEiwADSEjeNqw_5bdryZSNkak5BxSZxU9qIlhYUA6_d1VYtls3HSHEQ6KBMpRqRoCvIQQAvD_BwE

?