Patent ID: 11880001
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A three dimensional (3D) time of flight (TOF) camera, comprising:
a transmitter configured to generate an optical waveform with amplitude modulation corresponding with a frequency of a generated modulation signal, the transmitter including a resonant illumination driver configured to drive a light source that generates the optical waveform, the resonant illumination driver including:
a first inductor having a first terminal and a second terminal wherein the first inductor is configured to receive a drive current;
a second inductor having a first terminal and a second terminal wherein the first terminal of the first inductor is directly coupled to the first terminal of the second inductor;
a capacitor having a first terminal and a second terminal wherein the first terminal of the capacitor is directly coupled to the second terminal of the first inductor; and
a transistor having a control terminal, a first current terminal and a second current terminal wherein the control terminal is directly coupled to the second terminal of the capacitor wherein the second terminal of the second inductor and the second current terminal of the transistor are coupled to ground; and

a receiver configured to receive the optical waveform reflected off of a target object and determine a distance to the target object based on a TOF from the transmitter to the target object and back to the receiver.