Hybrid integration of photodetector array with digital front end

US10304987B2 · kind B2 · utility

Assignee

• Waymo LLC · US

Inventors

• Pierre-Yves Droz · Los Altos, US
• Caner Onal · Palo Alto, US

Key dates

• Filing date: May 7, 2018
• Grant date: May 28, 2019
• Expiry date: May 7, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F39/811

Abstract

The present disclosure relates to optical receiver systems. An example optical receiver system includes a first substrate with a plurality of photodetectors and a bias circuit. The bias circuit is electrically coupled to each photodetector of the plurality of photodetectors. The bias circuit is configured to provide a bias voltage to each photodetector. The optical receiver system also includes a plurality of capacitors. Each capacitor of the plurality of capacitors is electrically-coupled to a respective photodetector of the plurality of photodetectors. The optical receiver system also includes a second substrate with a read-out circuit having a plurality of channels. Each channel of the plurality of channels is capacitively-coupled to a respective photodetector via the respective capacitor.