LTSpice .wave statement and audio file processing question

Lucky-Luka

Member

• Dec 23, 2019

• #1

Hi all
I'm trying to work with the wave statement in my voltage amplifier circuit.
I've read that it works fine for an +-1V output range.
I have +-1V input range and my circuit gain is 10 so this statement doesn't work properly.
How can I properly scale my input signal (a .wav file) in order to get an appropriate output in the +-1V range?
Thanks

 

Attachments

• wave_questio.png

  121.8 KB · Views: 188
• 13_b - Amplificatore Multistadio componenti reali - wav.asc

  3.7 KB · Views: 220

W

Wade Hassler

Member

• Dec 23, 2019

• #2

You could put a voltage-divider on the input.

 

Lucky-Luka

Member

• Dec 23, 2019

• #3

Wade Hassler said:

You could put a voltage-divider on the input.

Click to expand...

Does resitors value matter?
I mean 10k and 1k is as good as 10 and 1?
Cheers

 

W

Wade Hassler

Member

• Dec 23, 2019

• #4

The divider's resistance should be no more than 10% of the circuit's input impedance.

 

Lucky-Luka

Member

• Dec 23, 2019

• #5

Wade Hassler said:

The divider's resistance should be no more than 10% of the circuit's input impedance.

Click to expand...

Just to be sure: is the voltage divider in the attachedd circuit ok?
My circuit input impedance is more or less 47k.
Thanks

 

Attachments

• 13_b - Amplificatore Multistadio componenti reali - wav.asc

  4 KB · Views: 184

unclejed613

Well-Known Member

Most Helpful Member

• Dec 23, 2019

• #6

or you could scale the output with a voltage divider, which is what i do when i test power amp designs...

 

Lucky-Luka

Member

• Dec 23, 2019

• #7

Do you think my voltage divider is ok for a47k input impedence circuit?
Cheers

 

alec_t

Well-Known Member

Most Helpful Member

• Dec 23, 2019

• #8

..... or you could reduce the input .wav amplitude using Audacity (or other audio file editor).