Trans-impedance amplifier, light receiving device and laser radar receiver

A technology of transimpedance amplifier and transimpedance amplification, which is applied in the direction of measuring devices, instruments, and re-radiation, and can solve the problems of limited detection range of transimpedance amplifiers, inability to adapt to the range of light intensity, and affecting the detection performance of transimpedance amplifiers. , to achieve the effect of improving the detection performance

Pending Publication Date: 2021-11-26
ZVISION TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the detection distance of the lidar is different, the light intensity range of the reflected light received by the receiving photosensitive device will also be different. However, since the transimpedance amplifier is usually a single fixed bandwidth, the detection range of the transimpedance amplifier is limited. In this way, The transimpedance amplifier cannot adapt to different light intensity ranges, which affects the detection performance of the transimpedance amplifier

Method used

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  • Trans-impedance amplifier, light receiving device and laser radar receiver
  • Trans-impedance amplifier, light receiving device and laser radar receiver
  • Trans-impedance amplifier, light receiving device and laser radar receiver

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Embodiment Construction

[0029] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0030] In order to illustrate the technical solutions described in this application, specific examples are used below to illustrate.

[0031] LiDAR is an object detection technology. The laser radar emits a laser beam through a laser. The laser beam encounters a target object and undergoes diffuse reflection. The detector receives the reflected beam and determines the distance, orientation, heigh...

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Abstract

The invention discloses a trans-impedance amplifier, a light receiving device and a laser radar receiver, which can be applied to the field of automatic driving or intelligent driving. The trans-impedance amplifier can comprise a trans-impedance amplification circuit and a feedback capacitance network, and the feedback capacitor network is connected in parallel with the trans-impedance amplification circuit, wherein the feedback capacitance network is used for configuring different capacitance values according to different received control signals, so that the bandwidth of the trans-impedance amplifier is dynamically adjusted, the light intensity ranges of different reflected light can be adapted, and the detection performance of the trans-impedance amplifier is further improved.

Description

technical field [0001] The present application relates to the technical field of laser radar, in particular to a transimpedance amplifier, a light receiving device and a laser radar receiver. Background technique [0002] The transimpedance amplifier (TIA) is one of the components of the receiving end of the LiDAR (light detection and ranging, LiDAR). The transimpedance amplifier is combined with the receiving photosensitive device, such as a photodiode, to convert and amplify the current signal caused by the reflected beam of the target object into an easily detectable voltage signal, so that the back-end acquisition and processing chip can process it. [0003] At present, with the rapid development of autonomous driving technology, higher and higher requirements are put forward for the detection distance and accuracy of lidar, and higher requirements are also put forward for the detection capability of transimpedance amplifiers. When the detection distance of the lidar is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/486G01S7/48G01S17/931
CPCG01S7/486G01S7/4802G01S17/931
Inventor 夏冰冰张赞石拓
Owner ZVISION TECH CO LTD
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