公开(公告)号：US10811963B2

公开(公告)日：2020-10-20

申请号：US16172381

申请日：2018-10-26

Applicant: NXP B.V.

Inventor： Xiaoqun Liu ,  Madan Mohan Reddy Vemula

IPC: H02M3/07 ,  H02H9/02 ,  H02M1/32

Abstract: A multi-stage charge pump circuit including a first stage of the multi-stage charge pump having a first voltage output, a last stage of the multi-stage charge pump having a first voltage input, and an inter-stage limitation circuit configured to protect a voltage drop of the first voltage output of the first stage of the multi-stage charge pump when there is a voltage drop on the first voltage input of the last stage of the multi-stage charge pump.

公开(公告)号：US10594285B1

公开(公告)日：2020-03-17

申请号：US16398556

申请日：2019-04-30

Applicant: NXP B.V.

Inventor： Siamak Delshadpour ,  Soon-Gil Jung ,  Xiaoqun Liu

IPC: H03G3/34 ,  G06F11/30 ,  H03K5/24 ,  H04L25/02

Abstract: A signal detector includes an input to receive a differential signal, a generator to generate a first voltage based on the differential signal and a second voltage based on the first voltage and a predetermined voltage, and an output stage to output a detection signal based on the first voltage and the second voltage. The differential signal includes a first signal and a second signal. The detection signal has a first value when a difference between the first and second signals is in a first range and a second value when the difference between the first and second signals is in a second range. The detection signal may indicate the presence or absence of low frequency periodic signaling for the differential signal. Such a detector may demonstrate fast response and operate at low-current.

公开(公告)号：US10432432B1

公开(公告)日：2019-10-01

申请号：US16047824

申请日：2018-07-27

Applicant: NXP B.V.

Inventor： Xiaoqun Liu ,  Siamak Delshadpour ,  Ahmad Yazdi

IPC: H04L25/03 ,  H04B3/46 ,  H03K5/24

Abstract: An electronic circuit, including an equalizer circuit to input a differential signal, a rectifier circuit to receive the differential signal and output a first current and a second current, a replica circuit to receive a differential threshold signal and output a third current and a fourth current to compensate for PVT variations in the first and second currents, and a comparator circuit configured to compare a differential voltage generated based on the first, second, third, and fourth currents to determine a loss of signal event of the electronic circuit.