Vision sensor chip with open-loop amplifier, operating method, and data processing system including same

摘要

A vision sensor chip includes a photoelectric conversion element that generates a current based on an incident light, a current-voltage (I-V) converter that converts the current into a voltage, an AC coupling capacitor directly connected to the I-V converter, an open-loop amplifier that includes a reset switch and amplifies a voltage provided by the I-V converter via the AC coupling capacitor. An event detection block detects motion according to a change in the amplified output voltage and generates first and second detection signals. A reset signal generator generates a reset signal controlling operation of the reset switch in response to first and second control signals respectively related to the first and second detection signals.

主权项

1. A vision sensor chip comprising:
a photoelectric conversion element that generates a current in response to incident light; a current-voltage converter that converts the current into a corresponding voltage and provides the corresponding voltage at an output terminal; an AC coupling capacitor directly connected to the output terminal of the current-voltage converter that receives the corresponding voltage and generates an output voltage; an open-loop amplifier including a reset switch that amplifies the output voltage to generate an amplified output voltage; an event detection block that detects motion in relation to a change in the amplified output voltage and generates first and second detection signals; and a reset signal generator that generates a reset signal controlling operation of the reset switch in response to first and second control signals respectively related to the first and second detection signals.