公开(公告)号：US11824443B2

公开(公告)日：2023-11-21

申请号：US17604765

申请日：2019-08-19

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Yuyang Liu ,  Bin Li ,  Yanqi Zheng ,  Zhaohui Wu

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/14 ,  H02M3/155

CPC classification number: H02M3/158 ,  H02M1/009 ,  H02M1/14 ,  H02M3/155

Abstract: This disclosure discloses a single-inductor multiple-output DC-DC buck converter, which includes a power conversion unit and i charge controllers, as well as a phase-locked loop, a logic unit, a driving unit, and an input trunk duty ratio generation unit. The charge controllers are connected to the driving unit through the logic unit. The logic unit is further connected to the phase-locked loop and the phase-locked loop is connected to the driving unit through the input trunk duty ratio generation unit. The driving unit is connected to the power conversion unit. The disclosure applies charge control to every output branch path, and adopts a phase-locked loop as the cycle control, which effectively suppresses the cross modulation effect of every branch path, and does not require the last branch path to have a sufficiently heavy load, which broadens the load range, while taking into account other performance requirements concurrently.

公开(公告)号：US11984859B2

公开(公告)日：2024-05-14

申请号：US17428637

申请日：2019-03-25

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Zhiming Liang ,  Bin Li ,  Zhaohui Wu

IPC: H03F1/02 ,  H03F3/387 ,  H03F3/45

CPC classification number: H03F3/387 ,  H03F3/45475

Abstract: A chopper amplifying circuit employing a negative impedance compensation technique, including a differential input end, a first-level chopper switch, a first-level amplifying circuit, a second-level chopper switch, a second-level amplifying circuit, a negative impedance converting circuit, a negative feedback unit, an input capacitor, and a differential output end, is provided. The differential input end is connected to the first-level chopper switch. An output terminal of the first-level chopper switch is connected to the first-level amplifying circuit through the input capacitor. The first-level amplifying circuit is connected to the second-level chopper switch, which is connected to the second-level amplifying circuit. The second-level amplifying circuit is connected to the differential output end, and is also connected to a feedback input end of the first-level amplifying circuit through the negative feedback unit. The negative impedance converting circuit is parallel-connected to a signal input end of the first-level amplifying circuit.