36results about How to "Circuit can be simplified" patented technology

A protection circuit is provided for protecting a secondary battery from overcharging and excessive discharge current by a simple circuit. The protection circuit is provided with a connection terminal (T3) for connecting the secondary battery (6); a connection terminal (T1) for connecting a charging device for charging the secondary battery (6) and / or a load device driven by a discharge current from the secondary battery (6); a bimetal switch (SW1) that is provided between the connection terminals (T1, T3) and turned off in the case of exceeding a specified temperature set beforehand; a heater (R2) for heating the bimetal switch (SW1); and an integrated circuit (IC1) for turning the bimetal switch (SW1) off by causing the heater (R2) to generate heat if a voltage applied to the connection terminal (T3) by the secondary battery (6) exceeds a preset reference voltage.

A protection circuit is provided for protecting a secondary battery from overcharging and excessive discharge current by a simple circuit. The protection circuit is provided with a connection terminal (T3) for connecting the secondary battery (6); a connection terminal (T1) for connecting a charging device for charging the secondary battery (6) and / or a load device driven by a discharge current from the secondary battery (6); a bimetal switch (SW1) that is provided between the connection terminals (T1, T3) and turned off in the case of exceeding a specified temperature set beforehand; a heater (R2) for heating the bimetal switch (SW1); and an integrated circuit (IC1) for turning the bimetal switch (SW1) off by causing the heater (R2) to generate heat if a voltage applied to the connection terminal (T3) by the secondary battery (6) exceeds a preset reference voltage.

A DC / DC converter according to the present invention includes a first switch connected to both ends of the DC power supply through a primary winding of a first transformer, a second switch connected to both ends of the DC power supply through a primary winding of a second transformer, a first series circuit connected between a node to which the primary winding of the first transformer and one end of the first switch are connected, and another end of the first switch, the first series circuit including a first diode, a smoothing capacitor, and an additional winding of the first transformer, which is connected to the primary winding of the first transformer in series, a second series circuit connected between a node to which the primary winding of the second transformer and one end of the second switch are connected, and another end of the second switch, the second series circuit including a second diode, the smoothing capacitor, and an additional winding of the second transformer, which is connected to the primary winding of the second transformer in series, a reactor connected to both ends of a series circuit in which a secondary winding of the first transformer and a secondary winding of the second transformer are connected in series, and a control circuit which turns on and off the first and second switches with a phase difference of half a cycle.

A DC / DC converter according to the present invention includes a first switch connected to both ends of the DC power supply through a primary winding of a first transformer, a second switch connected to both ends of the DC power supply through a primary winding of a second transformer, a first series circuit connected between a node to which the primary winding of the first transformer and one end of the first switch are connected, and another end of the first switch, the first series circuit including a first diode, a smoothing capacitor, and an additional winding of the first transformer, which is connected to the primary winding of the first transformer in series, a second series circuit connected between a node to which the primary winding of the second transformer and one end of the second switch are connected, and another end of the second switch, the second series circuit including a second diode, the smoothing capacitor, and an additional winding of the second transformer, which is connected to the primary winding of the second transformer in series, a reactor connected to both ends of a series circuit in which a secondary winding of the first transformer and a secondary winding of the second transformer are connected in series, and a control circuit which turns on and off the first and second switches with a phase difference of half a cycle.

To simplify an operation at the time when a controller which can control a touch panel returns to the normal mode. The touch panel includes a capacitive sensor having a pair of electrodes. The controller includes a control switch controlling supply of a potential to one electrode of the capacitive sensor; a current detection circuit detecting current flowing through the other electrode of the capacitive sensor; a power source circuit controlling supply of power source voltage to the current detection circuit; a power supply start switch including a power supply selection transistor whose gate potential is changed in accordance with a potential of the one of the pair of electrodes and controlling output of the power supply start signal to the power source circuit in accordance with a gate potential of the power supply selection transistor; and a control circuit controlling the control switch and the power source circuit.

In an optical fiber observing image processing apparatus, at least two different capturing modes is provided in an image capturing means for capturing image data from two or more television cameras, so that, by automatically switching capturing modes in synchronous with or independently from progress of the image processing, high speed processing can be achieved regardless of limitation of a data capturing speed. A scanning converting means is provided in a rear stage of the image capturing means, and a plurality of different transfer modes for transferring data between the scanning converting means and the image capturing means are prepared. Further, a delay means may be provided in a front stage of the scanning converting means.

To provide a fault detection device for an inverter system, that detects a fault in the inverter system including an inverter circuit 2 that converts DC power into AC power and a motor 5 driven thereby. When a driving start signal Sig1 of the inverter circuit 2 is input, a test voltage applying unit 20 applies a predetermined first test voltage to a current measuring unit 10 that measures current flowing in the inverter circuit 2, and it is determined whether the current measuring unit 10 has failed, based on the first test voltage. A control unit 30 applies a predetermined second test voltage to the inverter circuit 2 and the motor 5, and it is determined whether the inverter circuit 2 and a motor coil have failed, based on the second test voltage.

Implementing maintenance of a higher speed with fewest possible additional circuits while suppressing deterioration in characteristics of a clock buffer caused by an offset voltage. In a clock buffer circuit comprising a differential amplifier including a pair of load resistances, a pair of differential stage transistors, a constant current source transistor for supplying an operating current to the differential stage transistors, and a bias circuit for supplying to the constant current source transistor a bias voltage according to the resistance value of the load resistances, the bias circuit generates the bias voltage so controlled that the voltage gain of the clock buffer circuit becomes a predetermined value with respect to a variation of the resistance value of the load resistances.

A control circuit of a semiconductor device includes: a semiconductor element which supplies an electric power to a load; an over-heat protecting unit having: a temperature detecting section which detects a rise in temperature; a latch section which holds an output of the temperature detecting section; and a gate interrupting section which interrupts an input to a gate of the semiconductor element in accordance with the output of the latch section; a control unit which supplies a PWM signal for turning on / off the semiconductor element; a driving electric power supply unit which supplies a driving electric power for driving the over-heat protecting unit; and a timer unit which allows the driving electric power supply unit to supply the driving electric power for a predetermined period when the input to the gate of the semiconductor element is interrupted and the control unit stops to supply the PWM signal.

A capacitor 16 is charged by turning on a switching element 12, and when a relay 18 is operated, by turning off the switching element 12 and turning on a switching element 13, a constant-voltage power supply 11 and the capacitor 16 are series-connected, and a switching element 14 is turned on to cause the series circuit of the constant-voltage power supply 11 and the capacitor 16 to be connected to a relay coil 20, so that the voltage resulting from addition of the output voltage of the constant-voltage power supply 11 and the charging voltage of the capacitor 16 is supplied to the relay coil 20, whereby causing the relay 18 to be turned on, after which the capacitor 16 is gradually discharged by means of the relay coil 20.

In one embodiment of the present invention, to allow a circuit that compensates for variations in a threshold voltage of a drive element to operate properly and prevent luminances of other pixel circuits from fluctuating due to a compensation operation, a pixel circuit is disclosed. A driving TFT, a switching TFT, and an organic EL element are provided between a power supply wiring line and a common cathode, and a capacitor and a switching TFT are provided between a gate terminal of the driving TFT and a data line. A switching TFT is provided between a connection point B between the capacitor and the switching TFT and a reference supply wiring line, a switching TFT is provided between the gate terminal and a drain terminal of the driving TFT, and a switching TFT is provided between the gate terminal of the driving TFT and the connection point B.

A gas turbine power generation system is configured by a gas turbine, a main power generator which is coupled to a rotor of the gas turbine through a rotation shaft, a rotation rectifier which converts a three-phase AC current into a DC current and transfers the DC current to a field magnet winding wire of the main power generator, an AC exciter which is configured by an armature winding wire, a d-axis field magnet winding wire, and a q-axis field magnet winding wire, and transfers the three-phase AC current generated at the armature winding wire to the rotation rectifier, an excitation device which drives the AC exciter at the time of start-up of the main power generator, and an excitation power supply which supplies a current to the excitation device.

A capacitor 16 is charged by turning on a switching element 12, and when a relay 18 is operated, by turning off the switching element 12 and turning on a switching element 13, a constant-voltage power supply 11 and the capacitor 16 are series-connected, and a switching element 14 is turned on to cause the series circuit of the constant-voltage power supply 11 and the capacitor 16 to be connected to a relay coil 20, so that the voltage resulting from addition of the output voltage of the constant-voltage power supply 11 and the charging voltage of the capacitor 16 is supplied to the relay coil 20, whereby causing the relay 18 to be turned on, after which the capacitor 16 is gradually discharged by means of the relay coil 20.

A power semiconductor module has a detector for detecting main circuit current passing through a power semiconductor element. The detector includes first and second circuit patterns; a bonding wire connected at first and second bonding points with the first and second circuit patterns, respectively; and a pair of terminal patterns extended from near the first and second bonding points of the first and second circuit patterns. The detector is designed to detect a potential difference between the pair of terminal patterns generated by flowing main circuit current through the first circuit pattern, the bonding wire and then the second circuit pattern, in order to detect a potential difference across the bonding wire.

The present invention relates to an adjustable differential flow shuttle valve control system. The adjustable differential flow shuttle valve control system includes a direction control valve and a flow-rate control valve provided in medium inflow and outflow circuits of a working cylinder. The medium inflow and outflow circuits of the working cylinder (1) are connected with a two-position or three-position four-way valve (2). The medium inflow and outflow circuits of the working cylinder are provided with an adjustable differential flow shuttle valve (3).

A circuit body includes: a plurality of conductors, and first and second substrates, wherein the first and second substrates include a battery wiring portion which is routed along each row of an electrodes and one ends of the conductors are respectively connected to bus bars, and a connector connection portion where the other ends of the plurality of conductors are connected to a connector, and parts of the first substrate and the second substrate are overlapped in the connector connection portion, so an arrangement order of the other ends of the conductors corresponds to the potential order of the bus bars.

When the bit number of an error signal ERR2 is n and the magnitude of the error signal ERR2 is “a” (a is an integer) in decimal notation, a pulse-width modulator generates a PWM signal Spwm as a set of k (k is an integer of 2 or more) continuous sub-pulses. Further, the pulse-width modulator generates k sub-pulses in such a manner that the average value of the duty ratios of the sub-pulses becomes approximately a / 2n.

To simplify an operation at the time when a controller which can control a touch panel returns to the normal mode. The touch panel includes a capacitive sensor having a pair of electrodes. The controller includes a control switch controlling supply of a potential to one electrode of the capacitive sensor; a current detection circuit detecting current flowing through the other electrode of the capacitive sensor; a power source circuit controlling supply of power source voltage to the current detection circuit; a power supply start switch including a power supply selection transistor whose gate potential is changed in accordance with a potential of the one of the pair of electrodes and controlling output of the power supply start signal to the power source circuit in accordance with a gate potential of the power supply selection transistor; and a control circuit controlling the control switch and the power source circuit.

To provide a fault detection device for an inverter system, that detects a fault in the inverter system including an inverter circuit 2 that converts DC power into AC power and a motor 5 driven thereby. When a driving start signal Sig1 of the inverter circuit 2 is input, a test voltage applying unit 20 applies a predetermined first test voltage to a current measuring unit 10 that measures current flowing in the inverter circuit 2, and it is determined whether the current measuring unit 10 has failed, based on the first test voltage. A control unit 30 applies a predetermined second test voltage to the inverter circuit 2 and the motor 5, and it is determined whether the inverter circuit 2 and a motor coil have failed, based on the second test voltage.

In order to improve an accuracy of an autocorrelation function, a correlator comprises a counter 61 for receiving a pulse signal at given time intervals (sampling times) and counting the number of pulses; a shift register 63 for receiving the number of pulses counted by the counter 61 and performing sequential time delay; an operation part 64 for performing a product-sum operation of an output from the counter 61 and that delayed by the shift register 63 for each channel; and a control part 65 for setting a delay time or a sampling time by the shift register 63 on a basis of a relationship of the Fibonacci sequence.

The FM transmitter converts an input audio signal to a stereo composite signal, frequency-modulates the stereo composite signal and outputs the obtained signal. A stereo modulator stereo-modulates the output signal of the filter circuit, and converts the signal to the stereo composite signal. A frequency modulator frequency-modulates based on the stereo composite signal output from the stereo modulator. The filter circuit includes a pre-emphasis circuit, a low pass filter and the like, for example. At least one part of the filter circuit, that is, the low pass filter or the pre-emphasis circuit is configured with a switched capacitor filter.

A circuit body includes: a plurality of conductors and a substrate having flexibility and provided with the conductors, in which the substrate includes a battery wiring portion which is routed along each row of electrodes and where one ends of the conductors are respectively connected to bus bars, and a pair of connector connecting portions in which the other ends of the conductors provided in respective battery wiring portions are located, the pair of connector connecting portions include a connector mounting portion where the pair of connector connecting portions are guided from opposite directions, and in the connector mounting portion, the other ends of the conductors of the pair of the connector connecting portions are alternately arranged and an arrangement order corresponds to the potential order of the bus bars connected to the conductors.

A single-button control method of an induction actuated container, wherein the method comprises the steps of activating the control system of the container to enable the IR sensor operate in a normally-detecting state; detecting an object within a detecting area of the IR sensor; actuating, in responsive to a click of the control button, the cover panel to move to its opened position, when the control system is in the power-on state and the cover panel is in the closed position; normally retaining, in responsive to a click of the control button, the cover panel in the opened position, when the cover panel is moved to its opened position in responsive to an object detection; and actuating, in responsive to a click of the control button, the cover panel to move to its closed position, when the cover panel is in the normally-opened position.

A control circuit of a semiconductor device includes: a semiconductor element which supplies an electric power to a load; an over-heat protecting unit having: a temperature detecting section which detects a rise in temperature; a latch section which holds an output of the temperature detecting section; and a gate interrupting section which interrupts an input to a gate of the semiconductor element in accordance with the output of the latch section; a control unit which supplies a PWM signal for turning on / off the semiconductor element; a driving electric power supply unit which supplies a driving electric power for driving the over-heat protecting unit; and a timer unit which allows the driving electric power supply unit to supply the driving electric power for a predetermined period when the input to the gate of the semiconductor element is interrupted and the control unit stops to supply the PWM signal.

A battery power supply device is provided. The battery power supply device includes: an input unit that receives external power; a battery power unit that is connected to the input unit to charge a battery with the external power; a current detection unit that detects a current that is supplied to a load and that provides the current to the battery power unit; and an output unit that provides the external power and battery power from one node to the load and that receives a load current from the battery power unit to adjust output of the battery power.

A battery power supply device is provided. The battery power supply device includes: an input unit that receives external power; a battery power unit that is connected to the input unit to charge a battery with the external power; a current detection unit that detects a current that is supplied to a load and that provides the current to the battery power unit; and an output unit that provides the external power and battery power from one node to the load and that receives a load current from the battery power unit to adjust output of the battery power.

In one embodiment of the present invention, to allow a circuit that compensates for variations in a threshold voltage of a drive element to operate properly and prevent luminances of other pixel circuits from fluctuating due to a compensation operation, a pixel circuit is disclosed. A driving TFT, a switching TFT, and an organic EL element are provided between a power supply wiring line and a common cathode, and a capacitor and a switching TFT are provided between a gate terminal of the driving TFT and a data line. A switching TFT is provided between a connection point B between the capacitor and the switching TFT and a reference supply wiring line, a switching TFT is provided between the gate terminal and a drain terminal of the driving TFT, and a switching TFT is provided between the gate terminal of the driving TFT and the connection point B.