- on RF (radio)
- Published in issue 7/2001 on page 0
Switchable Crystal Oscillator
The circuit shows a switchable crystal oscillator which can generate any one of a number of set frequencies. Using the high-speed LT1394 comparator from Linear Technology (www.linear-tech.com) it is possible to build a crystal oscillator by putting the crystal in the negative feedback path, while an RC network in the positive feedback path provides the required phase lag.