The classic Schmitt-trigger-based RC oscillator is "hacked" and analyzed using the simulation software QSPICE.
This application note shows a unique way of creating an Schmitt trigger to optimize the design. To view the application note, click on the URL below. Circuit selected for www.eepn.com by Rahul Kadam.
More undocumented applications for the 555 ‘oscillator:’ Not all applications oscillate as we will see. Most are knowledgeable about common CMOS logic inverters and Schmitt triggers such as the 74HC04 ...