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US 11,387,624 B2Granted
Resonant laser driver
AssigneeAnalog Devices International Unlimited Company
InventorsJiannan Huang, Frank M. Yaul, Jonathan Ephraim David Hurwitz, Nicolas Le Dortz, Junhua Shen
Life of this patent
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Abstract
A laser emitter circuit comprises a laser diode; a driver circuit configured to generate a drive signal; and a resonant circuit coupled to the driver circuit and the laser diode, wherein the resonant circuit is configured to use the drive signal of the driver circuit to generate a continuous wave sinusoidal drive signal to drive the laser diode.
Claims22
A laser emitter circuit comprising:
- a laser diode;
- a driver circuit configured to generate a first drive signal;
- and
- a resonant circuit having a resonant frequency and coupled to the driver circuit and the laser diode, wherein the first drive signal has significant energy at substantially the resonant frequency of the resonant circuit and the resonant circuit generates a continuous wave sinusoidal drive signal to drive the laser diode.
1 more element
A laser diode drive circuit comprising:
- a resonant circuit having a resonant frequency and including an output for coupling to a laser diode, and an input;
- and
- a driver circuit coupled to the input of the resonant circuit and configured to provide a first drive signal to the resonant circuit having significant energy at the resonant frequency of the resonant circuit, wherein the resonant circuit is configured to produce a continuous wave sinusoidal drive signal from the first drive signal and drive the laser diode with the continuous wave sinusoidal drive signal;
- and
- a bias circuit including a bias inductance for coupling to the laser diode.
2 more elements
A method of operating a laser emitter of a time of flight sensor, the method comprising:
- generating a first drive signal using a driver circuit, wherein the first drive signal has significant energy at a first signal frequency;
- producing, using a resonant circuit having a resonant frequency substantially equal to the first signal frequency, a continuous wave sinusoidal drive signal from the first drive signal;
- and
- driving a laser diode of the laser emitter using the continuous wave sinusoidal drive signal.
1 more element
Dependencies are inferred from the claim text.