Abstract: A photodetection device according to the present disclosure includes: a first pixel that is configured to generate a first pixel signal; a reference signal generator that is configured to generate a reference signal; and a first converter that includes a first buffer circuit and a first comparison circuit and is configured to convert the first pixel signal into a digital code, the first buffer circuit configured to output a first signal corresponding to the reference signal from an output terminal, and the first comparison circuit configured to perform a comparison operation on the basis of the first pixel signal and the first signal.

Abstract: To provide an image capturing device capable of suppressing a decrease of a dynamic range of the entire image capturing device caused by an input transistor of a comparator inserted between a signal line and a load current source in an analog-digital converter. The image capturing device of the present disclosure includes: a load current source; a comparator that includes an input transistor connected between a signal line that transmits a signal read from a pixel and the load current source; and a reference signal supply section that supplies a predetermined reference signal to a charge-voltage conversion section of the pixel.

Abstract: In a solid-state imaging element in which AD conversion using a reference signal is performed, power consumption of a circuit that generates the reference signal is reduced. A pixel section outputs a pixel signal based on the light amount of incident light. A reference signal supply section generates a first reference signal and a second reference signal. A comparison section includes a first differential pair transistor to which the pixel signal and a signal based on the first reference signal are inputted and a second differential pair transistor to which the second reference signal is inputted. A counter section performs counting on the basis of a signal from the comparison section.

Abstract: Solid-state imaging devices are disclosed. In one example, a solid-state imaging device includes an AD converter that obtains an electric signal from a pixel and performs AD conversion on the electric signal. The electric signal is compared with a reference signal that has a voltage changing with the lapse of time. The reference signal is generated by a reference signal generator with a first current circuit that causes a first current to flow, an output circuit including a first input unit connected to the first current circuit, a second input unit that receives a reference voltage for determining an initial value of the reference signal, and an output unit that outputs the reference signal on the basis of voltages of the first input unit and the second input unit. A first capacitive element changes the reference signal by accumulating or discharging the first current.

Abstract: A photodetection device according to the present disclosure includes: a first pixel that is configured to generate a first pixel signal; a reference signal generator that is configured to generate a reference signal; and a first comparator including a first power supply circuit and a first comparison circuit, the first power supply circuit configured to generate a first power supply voltage on the basis of a power supply voltage supplied from a first power supply node and a bias voltage and configured to output the first power supply voltage from an output terminal, and the first comparison circuit configured to operate on the basis of the first power supply voltage and configured to perform a comparison operation on the basis of the first pixel signal and the reference signal.

Abstract: A photodetection device according to the present disclosure includes: a first pixel that is configured to generate a first pixel signal; a reference signal generator that is configured to generate a reference signal; and a first converter that includes a first buffer circuit and a first comparison circuit and is configured to convert the first pixel signal into a digital code, the first buffer circuit configured to output a first signal corresponding to the reference signal from an output terminal, and the first comparison circuit configured to perform a comparison operation on the basis of the first pixel signal and the first signal.

Abstract: In a solid-state imaging element in which AD conversion using a reference signal is performed, power consumption of a circuit that generates the reference signal is reduced. A pixel section outputs a pixel signal based on the light amount of incident light. A reference signal supply section generates a first reference signal and a second reference signal. A comparison section includes a first differential pair transistor to which the pixel signal and a signal based on the first reference signal are inputted and a second differential pair transistor to which the second reference signal is inputted. A counter section performs counting on the basis of a signal from the comparison section.