Other

Zhicong Luo

Jinghu Li

Hanghui Tu

Jianhai Yu

Fujie Chen

An Lin

Zhang Fan

Xin Hong

Haofan Ding

Qipeng Lin

Riqing Chen

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. The present invention includes a negative feedback unit, an adaptive drive unit, a mirrored tail current source, a resistor R, a resistor R, a bias current source IBIAS and a diode D; The resistor R, laser D, resistor R, and bias current source IBIAS are connected in series between the voltage VCC and the ground in sequence; the input terminal of the negative feedback unit is connected to the data signal input ports TINP and TINN, the output terminal of the negative feedback unit is connected to the input terminal of the adaptive drive unit, the output terminal of the adaptive drive unit is connected to the control signal input terminal of the mirrored tail current source, a drive signal output terminal of the mirrored tail current source is connected to the anode of the laser Dthrough a diode D, the other drive signal output terminal of the mirrored tail current source is connected to the cathode of the laser D

DC-coupled laser diode driver circuit with large modulation current

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 &#x2212;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.

High-speed transimpedance amplifier with bandwidth extension feature over full temperature range and bandwidth extension method

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).

High-speed optical transceiver integrated chip drive circuit with phase delay compensation function

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Xiamen, China

Zhicong Luo