Back to results
US 12,730,201 B2Granted
Active imaging system
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsJosep Segura Puchades, Anis Daami, Laurent Frey
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsJosep Segura Puchades, Anis Daami, Laurent Frey
Estimating the term…
An image sensor comprises a plurality of pixels (Pix), each comprising an elementary photodetector (211), wherein each pixel (Pix) comprises a circuit (201, 203) for detecting a beat frequency of a portion of a heterodyne beam received by the elementary photodetector (211) of the pixel, and wherein, in each pixel (Pix), the detection circuit (201, 203) comprises a frequency comparator (221) comprising a first input node (E1) receiving a first periodic AC signal (fpix) having a frequency equal to the beat frequency, a second input node (E2) receiving a second AC signal (framp) of variable frequency, and an output node (S) delivering an output signal switching from a first state to a second state when the frequency of the second signal (framp) exceeds the frequency of the first signal (fpix).
An image sensor comprising a plurality of pixels each comprising an elementary photodetector, the sensor comprising, for each pixel, a circuit for detecting a beat frequency of a portion of a heterodyne beam received by the elementary photodetector of the pixel, the detection circuit comprising a frequency comparator comprising a first input node receiving a first periodic AC signal having a frequency equal to said beat frequency, a second input node receiving a second AC signal of variable frequency, and an output node delivering an output signal switching from a first state to a second state when the frequency of the second signal exceeds the frequency of the first signal.
Dependencies are inferred from the claim text.