公开(公告)号：US11777452B1

公开(公告)日：2023-10-03

申请号：US18041203

申请日：2021-12-24

Applicant: XIAMEN EOCHIP SEMICONDUCTOR CO., LTD

Inventor： Zhicong Luo ,  Jinghu Li ,  Riqing Chen ,  Haofan Ding ,  Xin Hong ,  Jianhai Yu ,  Hanghui Tu

IPC: H03F3/08 ,  H03F1/30 ,  H03F1/42 ,  H03F3/45

CPC classification number: H03F1/301 ,  H03F1/42 ,  H03F3/45179 ,  H03F2200/36 ,  H03F2200/447

Abstract: A high-speed transimpedance amplifier with bandwidth extension feature over full temperature range and bandwidth extension method belong to the field of integrated circuit. The present invention solves the problem existed in boosting core amplifier bandwidth technology over full temperature range. The present invention includes a preamplifier TIA, a phase splitting stage PS, a pre-driver stage Pre-Drive, an output buffer BUFF and an offset cancelation circuit OC. The preamplifier TIA adopts the gate-drain voltage cancelation technology to expand the bandwidth, so that its −3 dB bandwidth is greater than twice the closed-loop bandwidth of the first-order TIA. The pre-driver stage Pre-Drive is used to drive the output buffer BUFF. By adjusting the source-level negative feedback capacitance value of the pre-driver stage Pre-Drive circuit to generate a high-frequency gain that varies with temperature, the preamplifier TIA bandwidth differences under different temperature conditions are compensated.

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).