公开(公告)号：US12237867B2

公开(公告)日：2025-02-25

申请号：US18787048

申请日：2024-07-29

Applicant: XIAMEN EOCHIP SEMICONDUCTOR CO., LTD

Inventor： Yuanyuan Zhou ,  Jinghu Li ,  Fujie Chen ,  Liangqiong Shi

IPC: H04B10/2507 ,  H04B10/69 ,  H04B10/80

Abstract: A high-speed TIA anti-5G WIFI electromagnetic interference method includes the steps of: stacking a high-voltage capacitor C9 and a resistor R11 for constructing a filter circuit on a bare DIE chip of TIA; splitting C9 into two parallel filter capacitors C91 and C92, which satisfy C9=C91+C92, C91=C92; constructing differential output to cancel signal interference; constructing electromagnetic interference that cancels out lens leakage by stacking avalanche photodiode APD, C91 and gold-plated pad on the vertical axis close to the bare DIE chip, and connecting to the pads through gold wires; stacking R11 and C92 on the vertical axis between pins VDD and VAPD, connecting R11 to C91 through gold wire No. 1, connecting C92 to pin VAPD through gold wire No. 2, the gold wire No. 1 and the gold wire No. 2 form a 90° angle to offset the electromagnetic interference leaked by the lens.

公开(公告)号：US12015445B2

公开(公告)日：2024-06-18

申请号：US18240601

申请日：2023-08-31

Applicant: XIAMEN EOCHIP SEMICONDUCTOR CO., LTD

Inventor： Jinghu Li ,  Fujie Chen ,  Hanghui Tu

IPC: H04B10/50

CPC classification number: H04B10/503

Abstract: An optical transmitter chip based on OTN transmission technology, which solves the high bit error rate in existing OTN technology for data transmission below 100 m in the data center, includes a transmitter TX, a digital control unit DIGIITAL, and a power module POWER. The transmitter TX first uses the optical modulation amplitude signal loss module to complete a judgment of an optical modulation amplitude for an attenuated electrical signal transmitted through metal traces on a PCB board. Only if the signal is greater than the preset threshold, an enable signal is output to control a linear equalizer and a laser driver to start, and open a signal transmission path for the chip-driven laser to emit an optical signal. The linear equalizer and the bypass ByPass process signal optimization in two-stage, then the signal is sent to the laser driver to drive the laser to emit an optical signal.

公开(公告)号：US12170543B2

公开(公告)日：2024-12-17

申请号：US18240611

申请日：2023-08-31

Applicant: XIAMEN EOCHIP SEMICONDUCTOR CO., LTD

Inventor： Jinghu Li ,  Fujie Chen ,  Hanghui Tu

IPC: H04B10/60 ,  H03L7/08

Abstract: An optical receiver chip based on OTN transmission technology to solve the high power consumption and serous signal attenuation problems for data transmission below 100 m in the data center includes a receiver, a digital control unit, and a power module. The receiver includes a 28G transimpedance amplifier and a limiting amplifier, converts a weak optical signal into an electrical signal, process a two-stage amplification, and output the signal in a limited state. The signal is then processed by a photodiode into a DC current RSSI, and judged by the internal received signal strength indicator module or the internal optical modulation amplitude loss of signal module of the limiting amplifier. If the signal does not meet the protocol requirements, the output buffer with de-emphasis and the linear equalizer are turned off, and the judgment result is transmitted to the host computer outside the chip simultaneously.

公开(公告)号：US11695480B2

公开(公告)日：2023-07-04

申请号：US17621209

申请日：2021-01-22

Applicant: XIAMEN EOCHIP SEMICONDUCTOR CO., LTD

Inventor： Zhicong Luo ,  Jinghu Li ,  Zhang Fan ,  Fujie Chen ,  Qipeng Lin ,  An Lin ,  Jianhai Yu ,  Hanghui Tu

IPC: H04B10/40 ,  H04B1/12 ,  H04B10/50 ,  H04B10/548 ,  H04L25/03

CPC classification number: H04B10/40 ,  H04B1/12 ,  H04B10/503 ,  H04B10/548 ,  H04L25/03343

Abstract: A high-speed optical transceiver integrated chip drive circuit with phase delay compensation function includes a transmitting end drive circuit to drive the laser to emit light to transmit signals and a receiving end drive circuit to optimize the signal degradation caused by the signal sent by the transmitting end drive circuit to the laser via the transmission backplane; a long code phase lead adjustment circuit is arranged on the main channel of the transmitting end drive circuit, and a long code phase lag adjustment circuit is set on the main channel of the receiving end drive circuit. The present invention is used to optimize high-speed signals and solve the problem that the CML drive circuit at the receiving end or the laser drive circuit at the transmitting end cannot compensate the difference between the group delay and phase delay for the high-speed signal after passing through the backplane (Laser device).