公开(公告)号：US10224873B1

公开(公告)日：2019-03-05

申请号：US15377004

申请日：2016-12-13

Applicant: Apple Inc.

Inventor： Joseph T. DiBene, II ,  Rashed Mahameed ,  Brad W. Simeral

IPC: H02K33/18 ,  H02N2/18 ,  H03B5/12

Abstract: In various embodiments, a voltage collection bootstrap circuit includes a capacitor, an inductor, an oscillator, a bias circuit, and a switch. A current may be induced in the inductor, the oscillator, or both. The inductor, the oscillator, or both may store energy in the capacitor. The inductor, capacitor, and oscillator may supply energy to the bias circuit. The bias circuit may output a difference between a reference voltage and a voltage corresponding to the energy received from at least one of the inductor, capacitor, and oscillator. Based on the output of the bias circuit, a switch may connect the voltage collection circuit to an output of at least one of the inductor, capacitor, and oscillator. Accordingly, energy may be provided to the voltage collection circuit using one or more induced currents.