CROSSTALK MITIGATION CIRCUIT FOR LIDAR PIXEL RECEIVERS

摘要

An apparatus for reducing crosstalk between cathodes of detector diodes of an imager detector array includes a capacitor (204) and voltage switch (201) coupled into a detector bias network to virtually isolate a detector diode (302) from a common cathode power plane (301) while simultaneously 'powering' the diode (302) for image acquisition, e.g., photo current detection. A method includes a timing sequence wherein during non-acquisition time intervals, the capacitor (204) is charged through the voltage switch (201) by turning the switch on to allow charge to flow into the capacitor (204) from a common supply plane (301). The method further includes disconnecting the capacitor (204) before an acquisition time interval such that during the acquisition time interval, the current through the detector diode (302), caused by incident flux, comes from the capacitor (204) and not from the common cathode power plane (301). The switch (201) may be a PMOS transistor. The capacitor (204) is of reasonable size to bias the diode (302) for an acquisition event.