Dynamic voltage and frequency scaling (DVFS) controller, integrated circuit including the DVFS controller, and method of operating the DVFS controller

A method of operating a dynamic voltage and frequency scaling (DVFS) controller for controlling an operating voltage and an operating frequency of an integrated circuit, the method comprising:

• receiving a resonance frequency calculated from a frequency response resulting from dynamic characteristics of an entire power system, the entire power system including a power management unit (PMU), a power delivery network (PDN), and a subblock circuit;
• receiving a feedback signal corresponding to an output of the entire power system to which the operating voltage and the operating frequency are applied;
• and
• controlling the PMU and a clock management unit (CMU) to update the operating voltage and the operating frequency, respectively, based on the resonance frequency and the feedback signal,
• wherein the DVFS controller is configured to perform a closed-loop control operation of the PMU and CMU to control the operating voltage and the operating frequency, respectively, based on the resonance frequency.

A Dynamic Voltage and Frequency Scaling (DVFS) controller, comprising:

• a power management unit (PMU) driving circuit configured to output a voltage control signal to a PMU;
• and
• a clock management unit (CMU) driving circuit configured to output a frequency control signal to a CMU,
• wherein the DVFS controller is configured to allow the PMU and the CMU to control an operating voltage and an operating frequency, respectively, based on a resonance frequency calculated from a frequency response resulting from dynamic characteristics of an entire power system including the PMU, a power delivery network (PDN), and a subblock circuit configured to process an instruction,
• wherein the DVFS controller is configured to perform a closed-loop control operation of the PMU and CMU to control the operating voltage and the operating frequency, respectively, based on the resonance frequency.