Laser driving circuit and laser equipment

A technology for driving circuits and lasers, used in lasers, laser parts, semiconductor lasers, etc., can solve the problem that time-of-flight sensors cannot take into account the driving capability and device area.

Pending Publication Date: 2019-08-30
湖北秉正讯腾科技有限公司
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  • Application Information

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Problems solved by technology

[0008] The main purpose of the present invention is to propose a laser drive circuit and laser equipment, aiming to solv

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  • Laser driving circuit and laser equipment

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a laser driving circuit and a piece of laser equipment. The laser driving circuit includes a first N-channel MOS tube, a second N-channel MOS tube, a current mirror and a firstresistor. The drain of the first N-channel MOS tube is connected with a first end of the first resistor, and a second end of the first resistor is connected with a preset power supply. The first N-channel MOS tube is connected with a preset laser and the current mirror. A preset DC voltage signal is obtained at the gate of the first N-channel MOS tube. The source of the first N-channel MOS tube is connected with the drain of the second N-channel MOS tube. A preset CML signal is obtained at the gate of the second N-channel MOS tube. Because the second N-channel MOS tube, namely, the input tube, is not a tail current tube, the use of a larger tail current tube is avoided, and the device area is reduced. The introduced first resistor can improve the modulation current, so that the driving ability is improved, and the technical problem that the driving ability and the device area cannot both be taken into account is solved.

Description

technical field [0001] The invention relates to the technical field of time-of-flight ranging, in particular to a laser drive circuit and laser equipment. Background technique [0002] With the continuous development of time-of-flight (TOF) technology, a time-of-flight sensor may be used to implement the TOF technology. [0003] Specifically, the time-of-flight sensor can first send out light pulses, and the light pulses will be reflected after encountering objects, and then the time-of-flight sensor will receive the reflected light pulses, and through the sent out light pulses and reflected light pulses, it can be determined distance information between objects. [0004] During the use of the time-of-flight sensor, the laser emitting light pulses in the time-of-flight sensor will be driven by the driving circuit. [0005] As far as the drive circuit is concerned, the drive circuit mostly includes an input tube and a laser. The input tube will be used to input the input si...

Claims

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Application Information

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IPC IPC(8): H01S5/042
CPCH01S5/0421H01S5/0427H01S5/0428
Inventor 孙向明郭迪高超嵩
Owner 湖北秉正讯腾科技有限公司
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