Low-mismatch and low-consumption transimpedance gain circuit for temporally differentiating photo-sensing systems in dynamic vision sensors
AssigneeConsejo Superior De Investigaciones Cientificas (Csic)
InventorsTeresa Serrano Gotarredona, Bernabé Linares Barranco
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Abstract
The invention relates to a low-mismatch and low-consumption transimpedance gain circuit for temporally differentiating photo-sensing systems in dynamic vision sensors, which uses at least one photodiode and at least two in-series transistors, each of the transistors being connected in diode configuration and being positioned at the output of the photodiode. The output current from the photodiode flows through the drain-source channels of the transistors and the source of the last transistor in series is connected to a voltage selected from ground voltage, a constant voltage or a controlled voltage.
Claims17
Low-mismatch and low-consumption transimpedance gain circuit for temporally differentiating photo-sensing systems in dynamic vision sensors, which employs at least one photodiode, wherein the system comprises at least two in-series transistors, each one of the transistors being connected in diode configuration and being positioned at the output of the photodiode, the output current of the photodiode flowing through the drain-source channels of the transistors and the last in-series transistor having the source connected to a voltage selected between an ground voltage, a constant voltage and a controlled voltage.
Dependencies are inferred from the claim text.