I am realy sorry, i put to much question here,
i just need a model of equivalent varactor of FV1043

somebody told me some book how to make a diode model in spice, but i search for free in google, but i did not find…..something similar to teach you to make a diode varactor model


THNX.

 

I have a oscillator 100MegHZ, with tuning diode, but when i change the voltage, he does not change the frequency in ltspice, the frequency stays the same, why, what for mistace i make?

 

See

 

I have a oscillator 100MegHZ, with tuning diode, but when i change the voltage, he does not change the frequency in ltspice, the frequency stays the same, why, what for mistace i make?

Show the circuit diagram of the oscillator.

 

See
View attachment 164133 View attachment 164134

Thank you very muchhhhhhh…………...

 

Show the circuit diagram of the oscillator.

Somebody else help me Sir Balounce

 

See

 

See
View attachment 164140

Thank you mannnn, God bless youuuu……...

 

See
View attachment 164133 View attachment 164134

Hi Bordodynov
Is this complete circuits, of i have to do something, because is not working to me

 

And you added varicap to the library (in the file standard.dio). I already did it. You can put the model on the circuit, as I did when demonstrating the dependence of capacity on voltage. I put a voltage limiter because without a varicap limit a large voltage develops (more than 5 volts), and the allowable voltage for this varicap is 5 volts. This limiter lowers the frequency. It is better to use the dual Schottky diode BAS70-04. To obtain a larger output amplitude, you can enable several such limiters in series (for example, 3 BAS70-04).

 

And you added varicap to the library (in the file standard.dio). I already did it. You can put the model on the circuit, as I did when demonstrating the dependence of capacity on voltage. I put a voltage limiter because without a varicap limit a large voltage develops (more than 5 volts), and the allowable voltage for this varicap is 5 volts. This limiter lowers the frequency. It is better to use the dual Schottky diode BAS70-04. To obtain a larger output amplitude, you can enable several such limiters in series (for example, 3 BAS70-04).

Hello,
yes i add it to library, now i understand

thank you very much……
Have a nice day and wekend....

 

See

 

See
View attachment 164219

I see, how you know so good, i like it.........….
Thanks for the time...……...​