公开(公告)号：US20200003875A1

公开(公告)日：2020-01-02

申请号：US16430391

申请日：2019-06-03

Applicant: Analog Devices Global Unlimited Company

Inventor： Yalcin Alper EKEN ,  Mehmet Arda Akkaya ,  Alp OGUZ

IPC: G01S7/486 ,  H03F1/08 ,  H03F3/08 ,  H03F1/34 ,  G01S17/10

Abstract: Mechanisms for evaluating amplitude for current pulses provided to a transimpedance amplifier (TIA) for current levels beyond the linear range of the TIA where clipping circuit(s) may limit the input voltage of the TIA are disclosed. In one aspect, an example TIA arrangement includes a clipping arrangement that includes multiple clipping circuits. Each clipping circuit can be biased by different bias voltages such that the different clipping circuits are activated at different input current amplitudes. Different clipping circuits can have different impedances, which can result in different recovery time characteristics. With the multiple clipping circuits in clipping arrangements discussed herein, a saturated dynamic range of a TIA can be divided into sub-regions and different pulse widening characteristics for each region may be defined, which may enable determination of amplitude for current pulses provided to the TIA even for current levels beyond the linear range of the TIA.

公开(公告)号：US20190293799A1

公开(公告)日：2019-09-26

申请号：US16442173

申请日：2019-06-14

Applicant: Analog Devices Global Unlimited Company

Inventor： Yalcin Alper EKEN ,  Alp OGUZ

IPC: G01S17/93 ,  H03F3/45 ,  H03F1/26 ,  H03F1/32 ,  H03F1/08 ,  G01S7/486 ,  G01S7/483 ,  H04B10/69 ,  H03F3/08

Abstract: A system and method for operating a high dynamic range analog front-end receiver for long range LIDAR with a transimpedance amplifier (TIA) include a clipping circuit to prevent saturation of the TIA. The output of the clipping circuit is connected via a diode or transistor to the input of the TIA and regulated such that the input voltage of the TIA remains close to or is only slightly above the saturation threshold voltage of the TIA. The regulation of the input voltage of the TIA can be improved by connecting a limiting resistor in series with the diode or transistor. A second clipping circuit capable of dissipating higher input currents and thus higher voltages may be connected in parallel with the first clipping circuit. A resistive element may be placed between the first and second clipping circuits to further limit the input current to the TIA.