An Oscillator Based on LDMOS Capacitor

The characteristic curve of the ordinary MOS capacitor is not monotonic, whereas the Laterally Diffused MOS (LDMOS) capacitor has a nearly ideal monotonic property. An oscillator based on LDMOS capacitor is designed and implemented using the standard 0.5 mum CMOS technology, and various essential factors have been considered, such as the layout size, the power consumption and the capacitance value, etc. The simulations and measurement results show that the oscillator has a small layout size, a low power consumption, a wide voltage range, and a high frequency accuracy.