On-chip filter-regulator, such as one for a microprocessor phase locked loop (PLL) supply

摘要

An on-chip, e.g., on a microprocessor, super filter-regulator acts as a voltage regulator and a low-pass filter. The voltage regulator generates a constant DC output voltage and regulates the DC voltage against instantaneous load changes. The low-pass filter and actively filters AC interference out of the DC output voltage. The super filter-regulator provides the filtered and regulated DC voltage to a phase locked loop circuit.