guys the diagarm i have attached is the interfacing circuit for steering angle sensor in Electronic stability control /ESC/ESPused in vehicles.


could someone expain how the waveforms are generated (which i have attached) from the microcontroller pins which is connected to optical encoder of steering wheel to measure steering wheel angle. atleast the basic concept of waves generation will help me.

 

http://archives.sensorsmag.com/articles/0200/28/index.htm

scroll down a small amount to the area with a yellow back ground.