Hi forks

I would like your help to design an oscillator in Pspice or Multisim. It is a sine wave oscillator that should have an output of 40 Khz.

Im not good in either Pscipe or Multisim. I have to use the oscillator in my Ultrasonic range finder, but I would like to have the software part done first before I do the Hardware part. So I one have any oscillator already designed or wishing to design and provide the files, I would really appreciate.

Thanks in advance.

 

anybody who can help?

 

There are hundreds of oscillator circuits on the internet. Pick one then simulate it.

 

my problem is how do I design it to get a 40 KHZ frequency, how do I make the choice on the values of resistor and capacitors for let's say, wein-bridge oscillator.

 

Look in Google Images for the schematic of a Wien Bridge oscillator.
An opamp can use resistor values from 2k ohms to about 20k ohms. Then the capacitor value is calculated using simple arithmatic.
Pick an opamp that works at 100kHz (there are many available). I would use a TL071 audio opamp. Here one schematic:

 

thanks for your help. I will do the rest now and simulate. thanks