The most common gate oscillator in use today is by far the Pierce-Gate. Its popularity stems from the fact that the digital inverter, U1, is usually included in the microprocessor or ASIC the designer selects. In effect, the oscillator cell U1 is free!
This whitepaper will analyze how the Pierce-Gate oscillator functions by breaking it down to its components. However, the simple analysis will suffice to convey the key points of Pierce-Gate Oscillator operation. In addition, it will present a simple design problem to teach how to derive at the Pierce-gate initial values.