Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
In Reply to: RE: non-inverting preamp w/schematic ver. 2 posted by deathtube 667 on June 18, 2017 at 07:41:59
Does LT Spice calculate impedance for you?
If so, whats the method?
The formula is just ohms law.
You need to set an AC current source at the output, do a small signal AC analysis from the simulate command.
Use a linear BODE plot for the left vertical axis ohms magnitude.
Look at the schematic for the Spice commands.
Hope that helps.
The easiest method is to set the main excitation voltage to zero and drive the output with a one amp AC current. Then you plot the voltage at the output and view it on a linear scale and the output in volts will be the output Z in ohms.
If it makes you feel better you can enter an expression to divide the voltage output by the Current you will get the impedance listed in ohms on the vertical scale.
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: