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.

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 28 G 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.

Abstract: A DFB laser DC-coupled output power configuration scheme with adjustable voltage difference. utilizes an external or internal power configuration unit to provide two electric DC power supplies with a fixed voltage difference for the transmitting unit TX of the DFB laser and the optical transceiver integrated chip, and at the same time optimizes the transmitting unit TX. The optimization scheme is that: the transistors in the transmitting unit TX are all low-voltage high-speed tubes, the transmitting unit TX includes a negative capacitance structure composed of capacitors C1 and C2, serving as an auxiliary structure for improving bandwidth. After optimization, the minimum voltage of the power supply voltage port TVCC of the transmitting unit TX is 2.7V and the problems that the output eye diagram is severely cracked and cannot be used when the traditional DFB laser configuration scheme with an external 3.3V power supply is tested at high temperature are solved.

Abstract: A DFB laser DC-coupled output power configuration scheme belongs to the field of laser drivers in optical communication integrated circuits. The present invention solves the existing problems in the conventional DFB laser power supply configuration scheme. The power configuration scheme of the present invention utilizes an external or internal power configuration unit to provide two electric DC power supplies with a fixed voltage difference for the transmitting unit TX of the DFB laser and the optical transceiver integrated chip, and at the same time optimizes the transmitting unit TX. The optimization scheme is that: the transistors in the transmitting unit TX are all low-voltage high-speed tubes, the transmitting unit TX includes a negative capacitance structure composed of capacitors C1 and C2, serving as an auxiliary structure for improving bandwidth. After optimization, the minimum voltage of the power supply voltage port TVCC of the transmitting unit TX is 2.7V.

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.

Abstract: A DFB laser DC-coupled output power configuration scheme belongs to the field of laser drivers in optical communication integrated circuits. The present invention solves the existing problems in the conventional DFB laser power supply configuration scheme. The power configuration scheme of the present invention utilizes an external or internal power configuration unit to provide two electric DC power supplies with a fixed voltage difference for the transmitting unit TX of the DFB laser and the optical transceiver integrated chip, and at the same time optimizes the transmitting unit TX. The optimization scheme is that: the transistors in the transmitting unit TX are all low-voltage high-speed tubes, the transmitting unit TX includes a negative capacitance structure composed of capacitors C1 and C2, serving as an auxiliary structure for improving bandwidth. After optimization, the minimum voltage of the power supply voltage port TVCC of the transmitting unit TX is 2.7V.

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.

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).

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).

Abstract: A DC-coupled laser driver circuit with large modulation current belongs to the optical field. The present invention solves the problem that the conventional laser driver circuit consumes too much voltage margin because the transistor is used as the tail current source, resulting in a small modulation current.

Abstract: A receiving and sending integrated chip for an OLT, which relates to the field of integrated circuits and optical communications. The present invention arms at resolving the problem of high production costs and long production cycle due to the fact that the functions of a limiting amplifier and a laser driver of a traditional OLT end optical module based on a GPON and an EPON are implemented by means of two circuit chips. The present invention provides two solutions. The first solution is designed based on the EPON, a transmitter threshold value configuration mode is that the threshold value configuration is implemented after an upper computer and a slave I2C circuit in the chip cooperate to complete electrifying, and LOS signal determination in a receiver can be automatically reset by means of a chip internal module.

Abstract: A receiving and sending integrated chip for an OLT, which relates to the field of integrated circuits and optical communications. The present invention arms at resolving the problem of high production costs and long production cycle due to the fact that the functions of a limiting amplifier and a laser driver of a traditional OLT end optical module based on a GPON and an EPON are implemented by means of two circuit chips. The present invention provides two solutions. The first solution is designed based on the EPON, a transmitter threshold value configuration mode is that the threshold value configuration is implemented after an upper computer and a slave I02C circuit in the chip cooperate to complete electrifying, and LOS signal determination in a receiver can be automatically reset by means of a chip internal module.