Peripheral Circuits


Knowledge of the oscillator and interface circuitry is important for a complete custom analog and mixed-signal integrated circuits. The oscillator can be used in more advanced oscillatory, such as phase-locked loop. However, the phase-locked loop is normally required for a very accurate source requirement. A basic built-in oscillator is normally sufficient for standalone analog or mixed-signal integrated circuits. The control clock is basically generated from the controller or master controller integrated circuit (IC).



Figure 9.1 shows a current-starved ring oscillator. The oscillation frequency of a basic ring oscillator is:

fosc = 1n.(tPHL+tP

Get CMOS Analog and Mixed-Signal Circuit Design now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.