Drive apparatus and distance measurement sensor including the same
AssigneesSamsung Electronics Co., Ltd., Korea University Research and Business Foundation
InventorsYong Sin KIM, Minseong KIM
Life of this patent
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Abstract
Provided is a drive apparatus configured to drive an optical device. The drive apparatus includes a preprocessing circuit configured to generate a first reference signal by performing preprocessing on an input signal; a drive circuit configured to generate a driving current for driving the optical device, and generate a replica current based on the driving current; and a calibration circuit configured to generate a replica voltage signal based on the replica current, generate a driving signal by changing a phase of the first reference signal based on the replica voltage signal, and provide the driving signal to the drive circuit.
Claims20
A drive apparatus configured to drive an optical device, the drive apparatus comprising:
- a preprocessing circuit configured to generate a first reference signal by performing preprocessing on an input signal;
- a drive circuit configured to generate a driving current for driving the optical device, and generate a replica current based on the driving current;
- and
- a calibration circuit configured to generate a replica voltage signal based on the replica current, generate a driving signal by changing a phase of the first reference signal based on the replica voltage signal, and provide the driving signal to the drive circuit.
A distance measurement sensor comprising:
- an optical device;
- a controller configured to generate at least one drive apparatus control signal;
- and
- a drive apparatus configured to generate a first driving current based on the at least one drive apparatus control signal and provide the first driving current to the optical device,
- wherein the drive apparatus comprises:
- a drive circuit configured to generate a replica current based on the first driving current;
- and
- a calibration circuit configured to generate a replica voltage signal based on the replica current, generate a driving signal by changing a phase of the at least one drive apparatus control signal based on the replica voltage signal, and provide the driving signal to the drive circuit,
- wherein the drive circuit is further configured to generate a second driving current based on the driving signal, and provide the second driving current to the optical device, and
- wherein a slew rate of the second driving current is greater than a slew rate of the first driving current.
A method of operating a drive apparatus configured to drive an optical device, the method comprising:
- generating a first reference signal by performing preprocessing on an input signal;
- generating a replica current based on a driving current driving the optical device;
- generating a replica voltage signal based on the replica current;
- generating a phase difference signal by detecting a phase difference between the replica voltage signal and a driving signal;
- generating a calibrated driving signal by shifting a phase of the first reference signal based on the phase difference signal;
- and
- generating the driving current based on the calibrated driving signal.
Dependencies are inferred from the claim text.