Help

If you know the microphone and headphone type, for most purposes you can replace them with a voltage source for the microphone, and a resistor for the headphones. (You may need to add a large resistor in parallel with the voltage source, and a large capacitor from there to the microphone input. That will take care of any biasing problems.)

You have to get the input for your model circuit from somewhere. A microphone model would not actually help, because to have any input, you'd need a model for the sound source, and MicroCap doesn't have that either.

Similarly, eventually you want to know how loud the sound from the headphones will be, but MicroCap doesn't have a sound pressure level (SPL) meter model.

So just use a voltage source for the microphone and a resistor (probably

8 or 4 ohms) for the headphones. You can get the microphone and headphone sensitivity numbers from the data sheets.

Cheers

Phil Hobbs

(Former MicroCap user)

--
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

Thank you Phill,you realy helped me!!!

i have one more question, one more problem. I also have antenna on my sheme,how could i put that in microcap,which component/components could replace antenna?...thanks