Precision Voltage-to-Frequency Converter,100 kHz Full-Scale, ±0.03% Non-Linearity

Lightium

Active Member

• May 20, 2023

• #2

You might try a zip file. Not too many a rar here.

 

danadak

Well-Known Member

Most Helpful Member

• May 20, 2023

• #3

Winzip will open RAR, RAR will open Winzip.....

 

Lightium

Active Member

• May 20, 2023

• #4

I just got in, so gimme a min...

 

Lightium

Active Member

• May 20, 2023

• #5

I cleaned up your schematic and it sim's but I am not sure about your intended outcome.

 

Attachments

• V-to-F Converter .asc

  5.2 KB · Views: 293

E

eTech

Well-Known Member

Most Helpful Member

• May 20, 2023

• #6

Hi

The attached zip file contains "V-to-F Converter (1).asc". This version works.
The circuit needs a negative voltage to function, so it has been converted to a split supply.
The LM356 has a max supply of +/- 5V. So I reduced the supply to +/- 5V.
The original circuit is designed for a -10 full scale input, so you'll need a different op amp.

I circled the changes on the schematic.

 

Attachments

• final_fixed.zip

  19.6 KB · Views: 296

H

hamed_bayat

New Member

• May 20, 2023

• #7

Thank you for your help
But it gives this output on my system....

 

E

eTech

Well-Known Member

Most Helpful Member

• May 20, 2023

• #8

hamed_bayat said:

Thank you for your help
But it gives this output on my system....
View attachment 141570

Click to expand...

It works on my system.
At any rate, its not the simulation. Its your circuit design.

 

H

hamed_bayat

New Member

• May 20, 2023

• #9

This op-amp is recommended by the datasheet

 

danadak

Well-Known Member

Most Helpful Member

• May 21, 2023

• #10

Application Note 240 and Application Note C additional notes might be useful :

http://www.introni.it/pdf/Bob%20Pease%20Lab%20Notes%20Part%209.pdf

Regards, Dana.

 

H

hamed_bayat

New Member

• May 21, 2023

• #11

It gives this message after running ....

 

H

hamed_bayat

New Member

• May 21, 2023

• #12

eTech said:

It works on my system.
At any rate, its not the simulation. Its your circuit design.

Click to expand...

View attachment 141576
It gives this message after running ....

 

Lightium

Active Member

• May 21, 2023

• #13

There is a problem with U3.

 

Lightium

Active Member

• May 21, 2023

• #14

Read these to solve your prob.

Quick Solutions to Solve SPICE Convergence Issues. - YouSpice

This article explains how to solve SPICE Convergence Issues for PSpice, or other versions such as XSPICE NGSPICE IsSPICE HSPICE.

www.youspice.com

http://www.intusoft.com/articles/converg.pdf

LTspice error: timestep too small

This is the error I see: This is my simulation command: What is the issue here?

electronics.stackexchange.com

 

Lightium

Active Member

• May 21, 2023

• #15

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