US 12,092,736 B2
Lidar signal receiving circuits, lidar signal gain control methods, and lidars using the same
Letian Liu, Shenzhen (CN); Shen Jiang, Shenzhen (CN); and Chunxin Qiu, Shenzhen (CN)
Assigned to SUTENG INNOVATION TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed by SUTENG INNOVATION TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed on Jun. 8, 2023, as Appl. No. 18/207,648.
Application 18/207,648 is a continuation of application No. 16/758,848, filed on Apr. 23, 2020, granted, now 11,703,590.
Application 16/758,848 is a continuation of application No. PCT/CN2019/104530, filed on Sep. 5, 2019.
Claims priority of application No. 201811376619.7 (CN), filed on Nov. 19, 2018.
Prior Publication US 2023/0333248 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 7/481 (2006.01); G01S 17/08 (2006.01)
CPC G01S 17/08 (2013.01) [G01S 7/4814 (2013.01); G01S 7/4816 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical signal processing circuit for Lidar, comprising:
an optical processing circuit, including an optical sensor and an amplification circuit, the optical sensor being configured to convert an optical signal to a photocurrent signal, and the amplification circuit being configured to convert and amplify the photocurrent signal to a voltage signal;
a gain control circuit, connected to the optical processing circuit, wherein the gain control circuit is a bias-voltage control circuit connected to the optical sensor, and is configured to adjust a bias voltage of the optical sensor; and
a controller, connected to the gain control circuit, adjusting a gain of the optical processing circuit via the gain control circuit and based on an amplitude of the voltage signal.