Title:
DRIVE CIRCUIT, DRIVE METHOD, TRANSIENT ENHANCED LDO CIRCUIT, CMOS DRIVER POWER SUPPLY CIRCUIT AND LASER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/031808
Kind Code:
A1
Abstract:
Disclosed are a drive circuit (200, 300, 400), a drive method (500) and a laser system (100). The drive circuit (200, 300, 400) comprises: a narrow pulse generator (210) configured to generate a first narrow pulse (22) on the basis of an input pulse (20), wherein the pulse width of the first narrow pulse (22) is smaller than the pulse width of the input pulse (20); a voltage adjuster (220) configured to be capable of generating an adjustable output voltage; and a drive unit (230) coupled to the narrow pulse generator (210) and the voltage adjuster (220) and configured to form a second narrow pulse (24) on the basis of the first narrow pulse (22) and the output voltage, wherein the second narrow pulse (24) is suitable for driving a switch transistor (240), the pulse width is approximately equal to the pulse width of the first narrow pulse (22), and the amplitude of the second narrow pulse (24) depends on the magnitude of the output voltage of the voltage adjuster (220). Thus, an output pulse with independently adjustable pulse width and amplitude can be formed. When such an output pulse is used for driving a laser (252), the light emission energy of the laser (252) can be quickly adjusted in a large dynamic range.
Inventors:
LIU JIANFENG (CN)
XIANG SHAOQING (CN)
XIANG SHAOQING (CN)
Application Number:
PCT/CN2020/105255
Publication Date:
February 25, 2021
Filing Date:
July 28, 2020
Export Citation:
Assignee:
HESAI PHOTONICS TECH CO LTD (CN)
International Classes:
H01S5/042; G05F1/56
Foreign References:
| CN110492349A | 2019-11-22 | |||
| CN110794907A | 2020-02-14 | |||
| CN104135253A | 2014-11-05 | |||
| CN101201638A | 2008-06-18 | |||
| CN106451386A | 2017-02-22 | |||
| CN108062139A | 2018-05-22 | |||
| CN103178441A | 2013-06-26 | |||
| US20170170626A1 | 2017-06-15 |
Attorney, Agent or Firm:
BEIJING LAWSING IP FIRM (CN)
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