Patent ID: 11949334
Assignee: APPLE INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 10:
11. A method comprising:
sourcing current, using a first switching circuit, to a first switch node, wherein the first switch node is coupled to a regulated power supply node via a first inductor;
sourcing current, using a second switching circuit, to a second switch node, wherein the second switch node is coupled to the regulated power supply node via a second inductor that shares a magnetic core with the first inductor;
filtering, using a first filter circuit, a voltage level of a first terminal of the first inductor to generate a first filtered signal;
filtering, using a second filter circuit, a voltage level of a second terminal of the first inductor to generate a second filtered signal;
filtering, using a third filter circuit, a voltage level of a first terminal of the second inductor to generate a third filtered signal; and
filtering, using a fourth filter circuit, a voltage level of a second terminal of the second inductor to generate a fourth filtered signal;
emulating coupling between the first and second inductors using a first capacitor coupled between the first and third filter circuits and a second capacitor coupled between the second and fourth filter circuits; and
adjusting, using a control circuit, operation of the first and second switching circuit using a voltage of the regulated power supply node, and the first, second, third and fourth filtered signals.