LIGHT RECEIVING DEVICE, LASER RADAR DEVICE, AND VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a light receiving device wherein decline of measurement accuracy or wrong detection of an object is prevented sufficiently, a laser radar device equipped therewith, and a vehicle equipped with the laser radar device. SOLUTION: A bias voltage Vbais applied to APD 81. When light enters the APD 81, a current corresponding to an incident light quantity P flows in the APD 81. A capacitor 83 removes a DC component in an output current from the APD 81 and outputs an incident light current Id. an I-V conversion circuit 84 converts the incident light current Idinto an incident light voltage Vd. An amplifying circuit 85 amplifies the incident light voltage Vd, and outputs a light receiving pulse Va. An inverting amplifying circuit 86 inverts and amplifies the light receiving pulse Vaand outputs an inverted amplified voltage Via. A half-wave rectifying circuit 87 performs half-wave rectification of the inverted amplified voltage Viaand outputs a noise level VnDC. A bias control circuit 88 controls the bias voltage Vbaby negative feedback based on the noise level VnDC. COPYRIGHT: (C)2008,JPO&INPIT