摘要:
Contacts and/or a transistor are shared by neighboring pixel circuits in an image sensor. In addition, a common interconnect line provides common control signals for minimizing metal wiring. Such minimization of space for the shared contacts, transistor, and control signals enhances the fill factor of photodiodes in the image sensor.
摘要:
Contacts and/or a transistor are shared by neighboring pixel circuits in an image sensor. In addition, a common interconnect line provides common control signals for minimizing metal wiring. Such minimization of space for the shared contacts, transistor, and control signals enhances the fill factor of photodiodes in the image sensor.
摘要:
A unit pixel of a complementary metal-oxide semiconductor (CMOS) image sensor includes a photoelectric conversion element, a transfer transistor, a boosting capacitor and a signal transfer circuit, where the photoelectric conversion element generates a charge based on incident light, the transfer transistor transfers the charge to a floating diffusion node in response to a transfer control signal, the boosting capacitor is disposed between a gate of the transfer transistor and the floating diffusion node, the signal transfer circuit transfers an electric potential of the floating diffusion node in response to a selection signal, and a dynamic range of the electric potential of the floating diffusion node may be widened and a drain-source voltage difference of the transfer transistor may be increased so that the charge transfer efficiency may be enhanced.
摘要:
Example embodiments may provide a CMOS image sensor. The CMOS image sensor may include a plurality of unit blocks each including two unit pixels. Each unit block may include two photodiodes having a hexagonal shape, a floating diffusion shared by the two unit pixels, a first transfer transistor and a second transfer transistor between the floating diffusion and the two photodiodes, respectively, a reset transistor connected with the floating diffusion, a drive transistor with a gate connected with the floating diffusion, and/or a selection transistor connected to the drive transistor in series. Example embodiment CMOS image sensors may be used in digital cameras, mobile devices, computer cameras, or the like.
摘要:
Example embodiments may provide a CMOS image sensor. The CMOS image sensor may include a plurality of unit blocks each including two unit pixels. Each unit block may include two photodiodes having a hexagonal shape, a floating diffusion shared by the two unit pixels, a first transfer transistor and a second transfer transistor between the floating diffusion and the two photodiodes, respectively, a reset transistor connected with the floating diffusion, a drive transistor with a gate connected with the floating diffusion, and/or a selection transistor connected to the drive transistor in series. Example embodiment CMOS image sensors may be used in digital cameras, mobile devices, computer cameras, or the like.
摘要:
A CMOS active pixel sensor includes a photodiode, a transmitting transistor, a reset transistor, a fingered type source follower transistor and a selecting transistor, where the photodiode generates charge in response to incident light, the transmitting transistor transmits the charge stored in the photodiode to a sensing node, the reset transistor, coupled to a power supply voltage, resets a voltage of the sensing node so that the sensing node has substantially a level of the power supply voltage, the fingered type source follower transistor amplifies the voltage of the sensing node, the selecting transistor transmits a voltage of a source electrode of the fingered type source follower transistor into an internal circuit in response to a selection signal, thus, the channel width of the source follower transistor may be increased, and the MOS device noise due to the source follower transistor may be reduced.
摘要:
A pixel circuit of an image sensor includes a floating diffusion node and a reset transistor. The reset transistor is coupled between the floating diffusion node and a reset control signal node of another pixel circuit of the image sensor. A voltage applied on the reset control signal node of the other pixel circuit is a reset voltage transmitted to the floating diffusion node via the reset transistor.
摘要:
A CMOS active pixel sensor includes a photodiode, a transmitting transistor, a reset transistor, a fingered type source follower transistor and a selecting transistor, where the photodiode generates charge in response to incident light, the transmitting transistor transmits the charge stored in the photodiode to a sensing node, the reset transistor, coupled to a power supply voltage, resets a voltage of the sensing node so that the sensing node has substantially a level of the power supply voltage, the fingered type source follower transistor amplifies the voltage of the sensing node, the selecting transistor transmits a voltage of a source electrode of the fingered type source follower transistor into an internal circuit in response to a selection signal, thus, the channel width of the source follower transistor may be increased, and the MOS device noise due to the source follower transistor may be reduced.
摘要:
A pixel circuit of an image sensor includes a floating diffusion node and a reset transistor. The reset transistor is coupled between the floating diffusion node and a reset control signal node of another pixel circuit of the image sensor. A voltage applied on the reset control signal node of the other pixel circuit is a reset voltage transmitted to the floating diffusion node via the reset transistor.
摘要:
A CMOS sensor array includes a plurality of unit blocks. A unit block includes: N pairs of photo diode regions arranged in a first direction; 2N transfer transistors respectively corresponding to the photo diode regions, wherein each of the transfer transistors is formed at a corner of the corresponding photo diode region, and wherein for each pair of photo diode regions the two corresponding transfer transistors symmetrically oppose each other; N floating diffusion nodes, wherein each of the floating diffusion nodes is respectively arranged between a pair of photo diode regions, and wherein each of the floating diffusion nodes is shared by the two corresponding transfer transistors and the pair of photo diode regions; at least one metal line for coupling the floating diffusion nodes; a reset transistor for resetting a voltage of the floating diffusion nodes; a readout circuit including at least one transistor for sampling the floating diffusion node, wherein the reset transistor and the readout circuit are disposed between the pair of photo diode regions.