公开(公告)号：EP4443731A1

公开(公告)日：2024-10-09

申请号：EP21966223.6

申请日：2021-12-20

Applicant: Shaanxi Reactor Microelectronics Co., Ltd.

Inventor： HE, Shibao ,  XIA, Qin

IPC: H02M7/02

CPC classification number: Y02B70/10

Abstract: The present invention provides a Ton timing circuit, a method and a switching power supply capable of reducing electromagnetic interference of the switching power supply, of which the circuit is a simple and easy-to-implement EMI reduction circuit of the switching power supply that can be integrated in a chip. This circuit adds a variable current source module and a random signal generation module on the basis of the original circuit, the random signal generation module generates N random square waves, which are used for the variable current source module and the constant current source I1 to generate N+1 variable currents, produce different frequencies, eliminate the resonant spikes at the switching frequency, and thus reduce electromagnetic interference caused by switching.

公开(公告)号：EP4451557A1

公开(公告)日：2024-10-23

申请号：EP22905727.8

申请日：2022-04-07

Applicant: Shaanxi Reactor Microelectronics Co., Ltd.

Inventor： RUAN, Jinlong ,  XIA, Qin

IPC: H03F1/02

Abstract: A power amplifier circuit based on envelope tracking technology and a design method thereof solve the problems of difficult efficiency guarantee of the traditional Doherty architecture power amplifier circuit and poor linearity at peak power output. The power amplifier circuit comprises a Doherty architecture and an external power supply; the external power supply is an ET power supply or APT power supply; the output terminal of the ET power supply or APT power supply is connected to a drain electrode of a first transistor in the Doherty architecture, and is connected to a gate electrode of a second transistor through a step-down module; or the output terminal of the ET power supply or APT power supply is simultaneously connected to the drain electrodes of the first transistor and the second transistor in the Doherty architecture, and is connected to the gate electrode of the second transistor through the step-down module.

公开(公告)号：EP4451558A1

公开(公告)日：2024-10-23

申请号：EP22905728.6

申请日：2022-04-07

Applicant: Shaanxi Reactor Microelectronics Co., Ltd.

Inventor： RUAN, Jinlong ,  XIA, Qin

IPC: H03F1/02

Abstract: A power amplifier circuit based on envelope tracking technology and Doherty architecture and a design method thereof, the circuit comprises a Doherty architecture and an external power supply; the external power supply is an ET power supply or an APT power supply; an output terminal of the ET power supply or APT power supply is connected to a drain electrode of a first transistor in the Doherty architecture; or the output terminal of the ET power supply or APT power supply is simultaneously connected to the drain electrodes of the first and second transistors in the Doherty architecture. The circuit makes a power amplifier work in the saturation state and therefore effectively improves the efficiency at the output power.

公开(公告)号：EP4425778A1

公开(公告)日：2024-09-04

申请号：EP21962093.7

申请日：2021-11-11

Applicant: Shaanxi Reactor Microelectronics Co., Ltd.

Inventor： HE, Shibao ,  WANG, Jiawei ,  XIA, Qin

IPC: H02M3/156 ,  H02M1/088 ,  H03K17/042

Abstract: The present invention discloses a circuit and a method for improving the response speed of load switching, a switch unit comprising a switch circuit and a switch unit control part; the switch circuit comprises a first power tube and a second power tube connected in series; a switch filter unit, comprising a working status judgment module, a first switch, a second switch, a third switch, a first inductor and a second inductor; the working status judgment module is used to determine whether the system is in startup, or normal operation, or load switching status, and make the system turn on or close said first switch, second switch, and third switch in different situations, so as to obtain a suitable inductor operation according to the different inductances of first inductor and second inductor and improve system response speed. The invention can improve the response speed of the system and make the ripple smaller.