Title:
AUTOMATIC PHASE-LOCKED CONSTANT-CURRENT SOURCE CIRCUIT AND METHOD FOR DRIVING TUNABLE LASER
Document Type and Number:
WIPO Patent Application WO/2024/031944
Kind Code:
A1
Abstract:
Disclosed in the present invention are an automatic phase-locked constant-current source circuit and method for driving a tunable laser. The circuit comprises a phase lag circuit, a phase-locked loop, a summator and a voltage-controlled constant-current source, which are connected in sequence, wherein an output end of the voltage-controlled constant-current source is connected to a high-pass filter; the high-pass filter is connected to the phase-locked loop; an input voltage is input into the phase lag circuit; the phase lag circuit can perform phase lagging on the input voltage and input same into the phase-locked loop; the phase-locked loop multiplies a phase lag voltage by a feedback voltage to obtain a superposed voltage, and filters and oscillates the superposed voltage and then inputs same into the summator; the summator adds an oscillating voltage and a direct-current bias voltage together, and inputs same into the voltage-controlled constant-current source; and an output voltage of the voltage-controlled constant-current source enters the high-pass filter for high-pass filtering, and then the feedback voltage is input into the phase-locked loop. Therefore, an output current automatically locks an input voltage, and it is ensured that the output current of a voltage-controlled constant-current source has the same frequency and phase as the input voltage, thus eliminating a phase difference of the output current lagging behind the input voltage.
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Inventors:
JIANG MINGSHUN (CN)
WEI JUNTAO (CN)
ZHANG FAYE (CN)
ZHANG LEI (CN)
WANG XIAOLONG (CN)
SUI QINGMEI (CN)
JIA LEI (CN)
WEI JUNTAO (CN)
ZHANG FAYE (CN)
ZHANG LEI (CN)
WANG XIAOLONG (CN)
SUI QINGMEI (CN)
JIA LEI (CN)
Application Number:
PCT/CN2023/075038
Publication Date:
February 15, 2024
Filing Date:
February 08, 2023
Export Citation:
Assignee:
UNIV SHANDONG (CN)
International Classes:
H01S5/042; G05F1/56
Foreign References:
| CN115220512A | 2022-10-21 | |||
| CN113097860A | 2021-07-09 | |||
| CN104821603A | 2015-08-05 | |||
| CN113572022A | 2021-10-29 | |||
| CN217008072U | 2022-07-19 | |||
| CN101719628A | 2010-06-02 | |||
| CN114628991A | 2022-06-14 | |||
| JP2012038833A | 2012-02-23 |
Other References:
ZHANG AN-TANG, ZHANG WEI: "A Phase Tracking Technique in Photovoltaic Grid-Connected Power System", ELECTRICAL MEASUREMENT & INSTRUMENTATION, vol. 48, no. 541, 31 January 2011 (2011-01-31), pages 39 - 41, 54, XP009552559, ISSN: 1001-1390
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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