Abstract: A light-emitting element includes an anode electrode, a QD layer containing QDs, and a cathode electrode, in which the QDs are Cd-free quantum dots having a core-shell structure including a core containing at least Ag, Ga, and at least one of S and Se, and a shell containing at least Zn, and exhibit fluorescence characteristics with a fluorescence full-width at half-maximum of 40 nm or less and a fluorescence quantum yield percentage of 70% or more.

Abstract: A light-emitting element includes an anode electrode, a cathode electrode, and a QD layer provided between the anode electrode and the cathode electrode, the QD layer containing the QDs. The QDs are AgInxGa1-xSySe1-y-based or ZnAgInxGa1-xSySe1-y-based Cd-free QDs (0?x<1, 0?y?1) and exhibit fluorescence characteristics having a fluorescent half width of 45 nm or less and a fluorescence quantum yield of 35% or more in a green wavelength region to a red wavelength region.

Abstract: An object of the present invention is to provide a method for manufacturing quantum dots capable of containing a large amount of Zn on a surface thereof, and a quantum dot. A method for manufacturing quantum dots of the present invention includes a step of producing a core containing at least Ag, Ga, and S or Ag, Ga, and Se, and a step of coating a surface of the core with a shell, and in the step of coating with the shell, the surface of the core is coated with GaS, and then Zn is added. It is preferable that the surface of the core is coated with ZnS after being coated with GaS. It is preferable that the core and the shell do not contain Cd and In.

Abstract: According to one embodiment, a semiconductor device includes, a first terminal, a second terminal, a third terminal, a first circuit configured to output a first signal of a first level if a temperature satisfies a condition, and a second circuit configured, if the first circuit outputs the first signal of the first level, to provide electrical insulation between the second terminal and the third terminal, wherein the first circuit includes an element provided between a first interconnect and the first terminal, and the first circuit outputs the first signal of the first level regardless of the temperature if a first voltage is supplied to the first interconnect.

Abstract: According to one embodiment, a constant voltage circuit includes: a first gain stage that outputting a first voltage amplifying a difference voltage between a divided voltage of an output voltage and a reference voltage; a second gain stage outputting a second voltage amplifying the first voltage; a second transistor, one end of which is coupled to the input voltage terminal, and other end of which is coupled to an output voltage terminal, controlling the output voltage to be constant in accordance with the second voltage applied to the gate; and a first circuit selecting one of a first operation mode and a second operation mode. When the first operation mode is selected, a first current flows to the first node, and when the second operation mode is selected, a second current flows to the first node.

Abstract: According to one embodiment, a constant voltage circuit includes: a first gain stage configured to output a first voltage amplified based on an output voltage and a reference voltage; a first transistor configured to control the output voltage based on the first voltage; a second transistor configured to control a current that flows through the first gain stage; a first circuit configured to convert an amount of fluctuation in the output voltage into a first current; and a second circuit configured to control a gate voltage of the second transistor based on the first current. A third current or a fourth current greater than the third current flows through the first gain stage based on the gate voltage of the second transistor.

Abstract: According to one embodiment, a constant voltage circuit includes: a first gain stage configured to output a first voltage amplified based on an output voltage and a reference voltage; a first transistor configured to control the output voltage based on the first voltage applied to a gate; and a second circuit configured to control a first signal based on a second voltage obtained by delaying an output timing of the output voltage and a third voltage that is based on the output voltage. In a case of the first signal being at a first logic level, a first current flows through the first gain stage, and in a case of the first signal being at a second logic level, a second current flows through the first gain stage.

Abstract: According to one embodiment, a semiconductor integrated circuit includes the following configuration. A first transistor has a source and a gate coupled to first and second voltage nodes respectively. A second transistor has a source and a gate coupled to third and second voltage nodes respectively. A third transistor is coupled between the first and second transistors. A fourth transistor has a source coupled to the first voltage node and a gate coupled to a first output node between the second and third transistors. A fifth transistor has a source coupled to the third voltage node, a gate coupled to the gate of the fourth transistor and a drain coupled to a drain of the fourth transistor. A sixth transistor has a gate supplied with a voltage output from a second output node between the fourth and fifth transistors and a source coupled to the first voltage node.

Abstract: According to one embodiment, a semiconductor integrated circuit includes the following configuration. A first transistor has a source and a gate coupled to first and second voltage nodes respectively. A second transistor has a source and a gate coupled to third and second voltage nodes respectively. A third transistor is coupled between the first and second transistors. A fourth transistor has a source coupled to the first voltage node and a gate coupled to a first output node between the second and third transistors. A fifth transistor has a source coupled to the third voltage node, a gate coupled to the gate of the fourth transistor and a drain coupled to a drain of the fourth transistor. A sixth transistor has a gate supplied with a voltage output from a second output node between the fourth and fifth transistors and a source coupled to the first voltage node.

Abstract: A semiconductor amplifier circuit has a driver that outputs a drive signal corresponding to an input signal and switches drive capability of the drive signal in accordance with a logic of an instruction signal, an instruction signal setting unit that sets the logic of the instruction signal in accordance with whether the input signal satisfies a predetermined condition, and an output circuit that comprises a control terminal to which the drive signal is input and an output terminal that outputs a signal obtained by amplifying the input signal.

Abstract: According to one embodiment, a constant voltage circuit includes: a first gain stage that outputting a first voltage amplifying a difference voltage between a divided voltage of an output voltage and a reference voltage; a second gain stage outputting a second voltage amplifying the first voltage; a second transistor, one end of which is coupled to the input voltage terminal, and other end of which is coupled to an output voltage terminal, controlling the output voltage to be constant in accordance with the second voltage applied to the gate; and a first circuit selecting one of a first operation mode and a second operation mode. When the first operation mode is selected, a first current flows to the first node, and when the second operation mode is selected, a second current flows to the first node.

Abstract: A semiconductor amplifier circuit has a driver that outputs a drive signal corresponding to an input signal and switches drive capability of the drive signal in accordance with a logic of an instruction signal, an instruction signal setting unit that sets the logic of the instruction signal in accordance with whether the input signal satisfies a predetermined condition, and an output circuit that comprises a control terminal to which the drive signal is input and an output terminal that outputs a signal obtained by amplifying the input signal.

Abstract: Voltage regulator circuitry includes a first element, a second element, an amplifier and a reference voltage source. The first element converts an input voltage and outputs a predetermined output voltage. The second element outputs a current in proportion to a current based on the outputted voltage from the first element. The amplifier amplifies a differential voltage between a reference voltage and a voltage in proportion to the output voltage, the amplifier which controls the first element based on the differential voltage. The reference voltage source outputs the reference voltage which adapts to a comparison between the current outputted from the second element and a reference current.

Abstract: A power circuit of an embodiment includes an amplifier circuit having a first and a second input. The amplifier circuit receives power from a power input and outputs an output voltage corresponding to a voltage difference between the first and second inputs. A reference voltage circuit supplies a reference voltage to the first input. A feedback circuit supplies a feedback voltage corresponding to the output voltage to the second input. A first ballast capacitance element is between the power input and the first input of the amplifier circuit.

Abstract: Voltage regulator circuitry includes a first element, a second element, an amplifier and a reference voltage source. The first element converts an input voltage and outputs a predetermined output voltage. The second element outputs a current in proportion to a current based on the outputted voltage from the first element. The amplifier amplifies a differential voltage between a reference voltage and a voltage in proportion to the output voltage, the amplifier which controls the first element based on the differential voltage. The reference voltage source outputs the reference voltage which adapts to a comparison between the current outputted from the second element and a reference current.

Abstract: A voltage regulator has feedback circuitry to generate a feedback voltage relative to an output voltage, and an amplifier to amplify a differential voltage between the feedback voltage and a reference voltage to generate the output voltage. The amplifier has a first transistor to feed a current in accordance with the feedback voltage, and a second transistor to feed a current in accordance with the reference voltage. The first transistor has a first gate to be applied with the feedback voltage, and the second transistor has a second gate to be applied with the reference voltage, and the voltage regulator further comprising a conductor disposed to face at least either one of the first and second gates, the conductor being set at a predetermined electric potential.

Abstract: A power supply device has an input and output, a first transistor between the input and output, and a differential circuit responding to a difference between output voltage and a reference voltage with an output connected to a gate of the first transistor. A current monitoring circuit comprises a second input transistor with a gate connected to the gate of the first transistor and causes monitor current corresponding to current flow in the first transistor to flow. A comparator compares the monitor current to a reference and activates a switch to control a zero-point circuit which is connected between an output of the differential circuit and an input of the differential circuit and minimizes oscillation without the necessity of an output capacitor.

Abstract: A power source device includes an output transistor connected between an input node at which an input voltage can be received and an output node at which an output voltage corresponding to the input voltage can be output according to a control voltage applied to a gate of the output transistor, a first amplifier that includes a first transistor element and a second transistor element having gates to which a first voltage is applied, receives a feedback voltage corresponding to the output voltage, and outputs a second voltage corresponding to a voltage difference between the feedback voltage and a reference voltage, a monitor transistor having a gate to which the first voltage is applied, a first current source that supplies a first current to the first amplifier, and a second current source that supplies a second current to the first amplifier according to a current flowing in the monitor transistor.

Abstract: A power supply device has an input and output, a first transistor between the input and output, and a differential circuit responding to a difference between output voltage and a reference voltage with an output connected to a gate of the first transistor. A current monitoring circuit comprises a second input transistor with a gate connected to the gate of the first transistor and causes monitor current corresponding to current flow in the first transistor to flow. A comparator compares the monitor current to a reference and activates a switch to control a zero-point circuit which is connected between an output of the differential circuit and an input of the differential circuit and minimizes oscillation without the necessity of an output capacitor.

Abstract: A power source device includes an output transistor connected between an input node at which an input voltage can be received and an output node at which an output voltage corresponding to the input voltage can be output according to a control voltage applied to a gate of the output transistor, a first amplifier that includes a first transistor element and a second transistor element having gates to which a first voltage is applied, receives a feedback voltage corresponding to the output voltage, and outputs a second voltage corresponding to a voltage difference between the feedback voltage and a reference voltage, a monitor transistor having a gate to which the first voltage is applied, a first current source that supplies a first current to the first amplifier, and a second current source that supplies a second current to the first amplifier according to a current flowing in the monitor transistor.