公开(公告)号：US10436726B2

公开(公告)日：2019-10-08

申请号：US14881889

申请日：2015-10-13

Applicant: UNIVERSITY OF MACAU

Inventor： Ka-Meng Lei ,  Pui-In Mak ,  Man-Kay Law ,  Rui Paulo Da Silva Martins

IPC: G01N24/08 ,  G01R33/44 ,  G01R33/30 ,  G01R33/341 ,  G01R33/34 ,  G01R33/36

Abstract: A palm-size portable μNMR relaxometer system for performing multi-step multi-sample chemical/biological assays, comprising a PCB having a CMOS μNMR transceiver and a DMF device integrated thereon. A portable magnet has an inner gap configured to at least partially receive the DMF device. The DMF device comprises a platform of electrodes including a sensing site and receives one or more samples for analysis at an electrode and automatically transports the one or more samples on individual paths sequentially to the sensing site, for performing sensing on each sample sequentially. A Butterfly coil disposed on the PCB and underneath the DMF device and is at least partially received in the inner gap. The Butterfly coil excites the sample at the μNMR sensing site by transducing a magnetic field produced at the sensing site to an electrical signal which is processed by the CMOS μNMR transceiver to produce an analytical signal.

公开(公告)号：US08963639B2

公开(公告)日：2015-02-24

申请号：US13770020

申请日：2013-02-19

Applicant: University of Macau

Inventor： Zushu Yan ,  Pui-In Mak ,  Man-Kay Law ,  Rui Paulo da Silva Martins

IPC: H03F3/45

CPC classification number: H03F3/45192 ,  H03F2200/408 ,  H03F2203/45631 ,  H03F2203/45674

Abstract: A three stage amplifier is provided and the three stage amplifier comprises a first gain stage, a second gain stage and a third gain stage wherein said first stage receives an amplifier input signal and said third gain stage outputs an amplifier output signal. The amplifier includes a feedback loop having a current buffer and a compensation capacitance provided from the output of said third gain stage to the output of the first gain stage. In addition, an active left half plane zero stage is embedded in said feedback loop for cancelling a parasitic pole of said feedback loop.

Abstract translation: 提供三级放大器，三级放大器包括第一增益级，第二增益级和第三增益级，其中所述第一级接收放大器输入信号，并且所述第三增益级输出放大器输出信号。 放大器包括具有电流缓冲器和从所述第三增益级的输出到第一增益级的输出的补偿电容的反馈回路。 此外，在所述反馈回路中嵌入有效的左半平面零级，以消除所述反馈回路的寄生极。

公开(公告)号：US10756643B2

公开(公告)日：2020-08-25

申请号：US15821862

申请日：2017-11-24

Applicant: University of Macau

Inventor： Zhiyuan Chen ,  Man-Kay Law ,  Pui-In Mak ,  Rui Paulo da Silva Martins

IPC: H01L41/04 ,  H02M7/06 ,  H02M7/217

Abstract: A flipping-capacitor rectifier circuit that enhances an output power of a piezoelectric energy harvester (PEH). The flipping-capacitor rectifier circuit includes a flipping capacitor, a plurality of switches, and an active rectifier. The flipping capacitor is connected in parallel with the PEH and forms at least three reconfiguration phases by turning on one or more of the switches. The active rectifier connects with the flipping capacitor in parallel and rectifies an AC voltage of the PEH. The flipping capacitor flips a voltage across a capacitor of the PEH to enhance the output power of the PEH by extracting power from the capacitor of the PEH.