144results about How to "Increase the voltage value" patented technology

The present invention provides a photoelectric conversion device capable of detecting light from weak light to strong light and relates to a photoelectric conversion device having a photodiode having a photoelectric conversion layer; an amplifier circuit including a transistor; and a switch, where the photodiode and the amplifier circuit are electrically connected to each other by the switch when intensity of entering light is lower than predetermined intensity so that a photoelectric current is amplified by the amplifier circuit to be outputted, and the photodiode and part or all of the amplifier circuits are electrically disconnected by the switch so that a photoelectric current is reduced in an amplification factor to be outputted. According to such a photoelectric conversion device, light from weak light to strong light can be detected.

It is an object to provide a photoelectric conversion device which detects light ranging from weak light to strong light. The present invention relates to a photoelectric conversion device having a photodiode having a photoelectric conversion layer, an amplifier circuit including a thin film transistor and a bias switching means, where a bias which is connected to the photodiode and the amplifier circuit is switched by the bias switching means when intensity of incident light exceeds predetermined intensity, and accordingly, light which is less than the predetermined intensity is detected by the photodiode and light which is more than the predetermined intensity is detected by the thin film transistor of the amplifier circuit. By the present invention, light ranging from weak light to strong light can be detected.

A semiconductor chip is mounted on a heat sink disposed inside a through-hole of a wiring board, electrodes of the semiconductor chip and connecting terminals of the wiring board are connected by bonding wires, a sealing resin is formed to cover the semiconductor chip and the bonding wires, and solder balls are formed on the lower surface of the wiring board, thereby constituting the semiconductor device. The heat sink is thicker than the wiring board. The heat sink has a protruded portion protruding to outside from the side surface of the heat sink, the protruded portion is located on the upper surface of the wiring board outside the through-hole, and the lower surface of the protruded portion contacts to the upper surface of the wiring board. When the semiconductor device is manufactured, the heat sink is inserted from the upper surface side of the wiring board.

An apparatus and method is disclosed for improving timing margins of logic paths on a semiconductor chip. Typical logic embodiments, such as CMOS (Complementary Metal Oxide Semiconductor), have path delays that become shorter as supply voltage is increased. Embodiments of the present invention store product data on each particular chip. The product data includes, for examples, but not limited to, a voltage range having a low limit voltage and a high limit voltage, a limit temperature, and performance of the particular chip in storage for the particular chip. Each chip has a voltage controller, a timer, and a thermal monitor. The voltage controller communicates with a voltage regulator and dynamically causes a voltage supply coupled to the chip to be as high as possible in the voltage range, subject to the limit temperature.

A computer fan control circuit which comprises a control chip, an integral circuit, a switch unit, a current control circuit, a feedback circuit and a first power source. The switch unit comprises a first end, a second end and a third end. The current control circuit comprises a current-limiting resistor and a current controller. The current controller comprises a first control end, a second control end and a third control end. The feedback circuit comprises a first feedback resistor. The control chip generates a first pulse width modulation signal. The input end of the integral circuit receives the first pulse width modulation signal. The output end of the integral circuit is connected with the first end of the switch unit. The second end of the switch unit is grounded through the first feedback circuit. The third end of the switch unit is connected with the first control end through the current-limiting resistor. The second control end is connected with the first power source. The third control end is connected with a power source pin of a fan connector. When the difference between the voltage of the first end and the voltage of the second end is smaller than a first threshold value, the switch unit is turned off, and the computer fan control circuit adjusts the rotating speed of the fan by changing the duty ratio of the first pulse width modulation signal.

A frequency-jitter-controller for a power-converter is provided, and which includes a first and a second capacitance units, a first and a second charge-discharge control units, a comparing unit and a control unit. Both capacitance units are charged to a crossing-voltage during a charging phase and discharged to a reference voltage and a clamp voltage respectively during a discharging-phase in response to operations of both charge-discharge control units. The comparing unit outputs a pulse signal, compares voltages of both capacitance units during the charging phase, and compares the voltage of the first capacitance unit and the reference voltage during the discharging phase. The control unit generates a frequency jitter control signal according to the pulse signal to adjust a rising rate of the voltage on the second capacitance unit, so as to change a frequency of the pulse signal, and thus reduce EMI generated by switching switch-elements in the power-converter.

Provided is a fuel cell system, in which the capacity component of a fuel cell is charged with an excess power (Ws) corresponding to the difference between the generation quantity (Pmes) of the fuel cell and a generation command value (Pref) by raising the output voltage of the fuel cell, if a generation command value (Pref) to the fuel cell is abruptly reduced while the fuel cell is being warmed by a low-efficiency run having a generation efficiency lower than that of the ordinary run. The fuel cell system equalizes an electric power (Pmes - Ws) to be fed to an external load of the fuel cell and the generation command value (Pref). As a result, the control can be made not to feed the excess power to the external load when the electric power requested on the fuel cell abruptly drops at the low-efficiency run.