US 12,470,042 B2
Self-calibrating driver circuit
Rahim Akbari-Dilmaghani, Eindhoven (NL)
Assigned to ams Sensors Asia Pte. Ltd., Singapore (SG)
Appl. No. 18/043,309
Filed by ams Sensors Asia Pte. Ltd., Singapore (SG)
PCT Filed Aug. 25, 2021, PCT No. PCT/SG2021/050503
§ 371(c)(1), (2) Date Feb. 27, 2023,
PCT Pub. No. WO2022/045978, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2013640 (GB), filed on Aug. 31, 2020.
Prior Publication US 2023/0299556 A1, Sep. 21, 2023
Int. Cl. H01S 5/042 (2006.01); H01S 5/06 (2006.01); H01S 5/068 (2006.01); H01S 5/0683 (2006.01)
CPC H01S 5/0428 (2013.01) [H01S 5/0617 (2013.01); H01S 5/06808 (2013.01); H01S 5/06835 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A self-calibrating driver circuit (100, 300, 400, 500, 700) for a laser diode, the circuit comprising:
a configurable current source (105, 305, 405, 505);
a current mirror (115, 315, 415) configured to mirror a current from the configurable current source to a first transistor (120, 320, 420, 520, 720) and to a second transistor (125, 325, 425, 725); and
a control circuit (140, 340, 440),
wherein the control circuit is configured to monitor a current through the first transistor at a first time, and to configure the current source based on the current through the first transistor to provide a desired current to the second transistor for driving the laser diode (145, 345) at a subsequent second time.