Patent ID: 11867814
Assignee: AEVA, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A frequency modulated continuous wave (FMCW) light detection and ranging (LiDAR) system, comprising:
an optical source to generate light at a target frequency;
a first transistor to transmit a modulation current through a modulation path that includes the optical source and a modulation resistor;
an electro optical circuitry coupled to the first transistor to produce a phase locked loop to maintain the light generated by the optical source at the target frequency, wherein the electro optical circuitry comprises a phase-frequency detector, a charge pump, and a loop filter coupled in series to a non-inverting input of an operational amplifier configured as an integrator, and wherein the inverting input of the operational amplifier is coupled to a set of ramp selection switches; and
a second transistor to transmit a bias current through a bias path that includes the optical source, wherein the bias path is separate from the modulation path.