Abstract: A radiation sensing device that includes (a) a readout circuit that includes a first readout capacitor and a second readout capacitor, and (b) a pixel that includes: (i) a radiation sensing element that is configured to convert radiation that impinges on the radiation sensing element to radiation indicative charge; (ii) a floating diffusion branch that includes a floating diffusion region, a floating diffusion reset switch, and a floating diffusion branch output circuit; (iii) a capacitor branch that includes a capacitor branch switch, a capacitor, a capacitor reset switch and a capacitor branch output circuit; wherein a capacitance of the capacitor exceeds a capacitance of the floating diffusion region; and (iv) an input transfer gate that is configured to couple the radiation sensing element to at least one of the capacitor branch and the floating diffusion branch.

Abstract: An inspection system that includes multiple pixel circuits, a readout circuit and a processing circuit. The multiple pixel circuits are configured to generate detection signals. The readout circuit is configured to read the detection signals. The processing circuit is configured to process the detection signals by applying one or more compensation functions. The one or more compensation functions are determined based on pixel circuit gain functions. For each pixel circuit, a pixel circuit gain function includes a set of a group of pixel circuit related values that include a sub-set of border region pixel circuit related values that are located within a border region of the pixel circuit dynamic range. The border region includes a border between the first part of the pixel circuit dynamic range and the second part of the pixel circuit dynamic range.

Abstract: An inspection system that includes multiple pixel circuits, a readout circuit and a processing circuit. The multiple pixel circuits are configured to generate detection signals. The readout circuit is configured to read the detection signals. The processing circuit is configured to process the detection signals by applying one or more compensation functions. The one or more compensation functions are determined based on pixel circuit gain functions. For each pixel circuit, a pixel circuit gain function includes a set of a group of pixel circuit related values that include a sub-set of border region pixel circuit related values that are located within a border region of the pixel circuit dynamic range. The border region includes a border between the first part of the pixel circuit dynamic range and the second part of the pixel circuit dynamic range.

Abstract: A time-of-flight device comprises a pixel array including a plurality of pixel circuits arranged in an array, respective ones of the plurality of pixel circuits including a first photodiode configured to selectively output two analog signals respectively via two paths, and including a second photodiode configured to selectively output two analog signals respectively via two paths; a signal line coupled to the first photodiode and a second photodiode; and processing circuitry including: a comparator configured to compare a voltage of the signal line with a reference signal and to output a comparison result, and a counter configured to perform a count based on the comparison result in response to a count control signal, wherein the count control signal is configured to switch the counter between an up count mode and a down count mode while a count value is held in the counter.

Abstract: A time-of-flight device comprises a pixel array including a plurality of pixel circuits arranged in an array, respective ones of the plurality of pixel circuits including a first photodiode configured to selectively output two analog signals respectively via two paths, and including a second photodiode configured to selectively output two analog signals respectively via two paths; a signal line coupled to the first photodiode and a second photodiode; and processing circuitry including: a comparator configured to compare a voltage of the signal line with a reference signal and to output a comparison result, and a counter configured to perform a count based on the comparison result in response to a count control signal, wherein the count control signal is configured to switch the counter between an up count mode and a down count mode while a count value is held in the counter.

Abstract: A time-of-flight image sensor (TOF) for imaging with ambient light subtraction. In one embodiment, the TOF image sensor includes a pixel array, a control circuit, and a signal processing circuit. The signal processing circuit reads out a first data signal from respective first floating diffusions and respective second floating diffusions during a first frame while a light generator is not emitting, reads out a second data signal from the respective first floating diffusions and the respective second floating diffusions during a second frame after the first integration and after a second integration while the light generator is emitting, generate a third data signal indicative of ambient light, generate a fourth data signal indicative of the ambient light and a light signal reflected off an object, and generate a fifth data signal indicative of the light signal by subtracting the third data signal from the fourth data signal.

Abstract: A pixel readout circuit for use with an imaging pixel array, comprising: an input channel for receiving an image signal corresponding to an electrical output of a photosensitive element of the pixel; and an electronic circuit interconnected between an input channel and an output readout utility. The electronic circuit comprises a capacitive unit, and a single analyzer. The capacitive unit is controllably linked to the input channel for accumulating a charge corresponding to received intensity generated by the pixel during a single frame period, and is connected to the output readout utility.

Abstract: A pixel readout circuit for use with an imaging pixel array, comprising: an input channel for receiving an image signal corresponding to electrical output of a photosensitive element of the pixel; and an electronic circuit interconnected between said input channel and an output readout utility. The electronic circuit comprises a capacitive unit, and a single analyzer. The capacitive unit is controllably linked to input channel for accumulating charge corresponding to received intensity generated by said pixel during a single frame period, and is connected to output readout utility. The signal analyzer unit is controllably linked to input channel and connected to output readout utility, and is configured for analyzing at least a part of said image signal by determining change in amount of accumulated charge corresponding to the received intensity, and upon detecting that the amount of charge satisfies a predetermined condition generating data indicative of a detected event.