59results about How to "No leakage current" patented technology

The invention discloses a high-voltage direct-current circuit breaker based on double switches. The high-voltage direct-current circuit breaker comprises a semi-conductor switch tube, a switch tube control optocoupler, a switch tube control resistor, an isolation power supply, a relay control resistor, a relay control optocoupler and a double-pole double-throw relay. The semi-conductor switch tube is connected with a positive end of a high-voltage direct-current power transmission line in series. The double-pole double-throw relay has two accesses, one access is connected with the positive end of the high-voltage direct-current power transmission line in series and connected behind the semi-conductor switch tube in cascade mode, and the other access is connected with a negative end of the high-voltage direct-current power transmission line in series. The output ends of the two accesses of the double-pole double-throw relay are respectively the output positive end and the output negative end of the high-voltage direct-current power transmission line. Connection and disconnection of the semi-conductor switch tube are controlled by the switch tube control optocoupler, and connection and disconnection of the two accesses of the double-pole double-throw relay are controlled by the relay control optocoupler. The circuit breaker is small in size, fast in connection and disconnection, free of leakage current and safe and reliable to use.

An insulation detection circuit comprises a first resistor, a second resistor, a third resistor and a first switch, wherein one terminal of the first resistor is connected with a first input positive terminal; the other terminal of the first resistor is respectively connected with one terminal of the first switch and one terminal of the second resistor; the other terminal of the first switch is grounded; the other terminal of the second resistor is connected with an input negative terminal through the third resistor, so that the insulation detection circuit can be really isolated from the ground, thereby avoiding the production of leakage currents; and the precision of the insulation detection circuit is relatively high. An inverter comprises a main body and the insulation detection circuit, wherein the insulation detection circuit is connected in parallel to an input terminal of the inverter, so that the first switch of the insulation detection circuit can be turned off after the work of the insulation detection circuit is completed, thereby really isolating the insulation detection circuit from the ground, avoiding the production of the leakage currents and guaranteeing normal work of the inverter.

A waveguide photodetector and forming method thereof are provided. The method of forming a waveguide photodetector includes: forming a waveguide on a silicon-on-insulator(SOI) substrate(100), depositing a first oxide coating over the waveguide and on the SOI substrate(102), creating a seed window through the first oxide coating to a bulk silicon layer of the SOI substrate(104), depositing a photodetector material into the seed window and on top of the first oxide coating over the waveguide(106), depositing a second oxide coating over the photodetector material and over the first oxide coating deposited over the waveguide and on the SOI substrate(108), and applying thermal energy to liquefy the photodetector material(110). Thereby, the leakage current characteristics of the waveguide photodetector are improved.

The invention discloses a high-assembly-accuracy grid-control electronic gun which comprises a cathode hot wire component, a heat shield combination, a supporting cylinder combination, a control grid combination, a shadow grid combination, a gun shell combination and a magnetism shield welding cylinder combination. The electronic gun is reasonable in design, assembling parts of the electronic gun are screened out through a large number of experiments, and the electronic gun with high accuracy is obtained by assembling. The electronic gun is long in service life and high in reliability and stability, a specific-shaped electron beam can be provided for a coupled cavity traveling-wave tube, the assembling requirement of the high-standard coupled cavity traveling-wave tube can be well met, and the shortcomings of the prior art can be overcome.

This invention relates to a method of driving a dual-function light-emitting and light-sensing device (5) comprising an organic electroluminescent layer (1), such as a polymer layer or a small molecule compound layer, which is sandwiched between a first and a second electrode (2,3), comprising the following steps:-applying, during a emission state (t1), a first emission signal (V1, J1) to said electroluminescent layer (1), said first signal being such that light is generated by and emitted from said electroluminescent layer (1), and-applying, during a sensing state (t2), a second driving signal (V2,J2) to said organic electroluminescent layer (1), said second driving signal being such that the power of said second driving signal has essentially a zero value for accurately detecting an electric current generated in said organic electroluminescent layer when said organic electroluminescent layer is hit by external light This invention also relates to a dual-function light-emitting and light-sensing device and applications thereof.

The invention discloses a digital display high-sensitivity conductivity and high-resistance resistivity measuring circuit which comprises a measuring circuit body, a precise amplifying and convertingcircuit and a digital A / D converting and displaying circuit in sequential connection. The measuring circuit body sends voltage signals of a measured resistor to the precise amplifying and converting circuit, and the voltage signals are adjusted to voltages for ratio method resistivity measurement after being subjected to impedance conversion and resistivity partial pressure by the precise amplifying and converting circuit. The precise amplifying and converting circuit sends adjusted reference voltages and adjusted measurement signal voltages to the digital A / D converting and displaying circuit, and the reference voltages and the signal voltages are converted into corresponding display values by the digital A / D converting and displaying circuit to be displayed. The invention further provides a digital display high-sensitivity conductivity and high-resistance resistivity measuring method. When the to-be-measured Rx changes according to the coefficient k, the measurement signal voltages / reference voltages can change in inversion proportion according to the same change coefficient k, and therefore conductivity measurement is realized, calculation errors in the prior art can be eliminated, and the measurement precision is high.

The invention discloses a formation method of a trench isolation structure. The formation method comprises the following steps: providing a substrate, wherein the surface of the substrate is provided with a mask layer, and the mask layer exposes a part of the surface of the substrate; etching the substrate by taking the mask layer as a mask, and forming a trench in the substrate; forming a laying at the side wall of the trench and the surface of the bottom; after the laying is formed, etching the side wall of the mask layer to expose a part of the substrate surface around the trench; after the side wall of the mask layer is etched, by taking the mask layer and the laying as masks, doping modified ions on the surface of the exposed substrate, and forming a barrier layer on the surface of the exposed substrate, wherein the barrier layer is disposed at the substrate surface surrounding the top of the trench; and after the barrier layer is formed, forming an isolation layer fully filling the trench on the surface of the laying. The isolation effect of the formed trench isolation structure is good.

The invention relates to a defibrillation energy storage capacitor and a charging circuit. A storage battery is sequentially connected with the charging circuit and a low-voltage energy storage capacitor. A first interface of a PWM chip IC1 of the charging circuit, a resistor R2 and a fourteenth interface of the IC1 are connected in series. A first interface of the IC1, the capacitor C1, the resistor R1 and a twelfth interface of the IC1 are connected in series; one path between the C1 and the R1 is connected with a 13th interface of the IC1; one path is connected with a capacitor C2 and thenconnected with a tenth interface of the IC1, and the other path is grounded; one path of a ninth interface of the IC1 is connected with a sixth interface of the IC1, one path is grounded after being connected with a capacitor C3, and one path is connected with a third interface of the dual operational amplifier IC2; an eighth interface of the IC1 is connected with a first interface of the IC2, a fourth interface of the IC2 is grounded, the eighth interface of the IC2 is connected with 12V, the fourth interface of the IC2 is respectively connected with the resistor R4 and the resistor R5, and afifth interface of the IC1 is connected with a seventh interface of the IC1 in series. Safety is guaranteed, waiting is not needed, stable and repeated charging and discharging can be achieved, the economic effect is good, and power consumption is reduced.

The invention provides a transformer, which comprises a magnetic core, a primary power winding, a secondary power winding and a shielding winding, wherein the magnetic core comprises an upper magneticcore and a lower magnetic core; a wrapping post of the upper magnetic core is matched with the wrapping post of the lower magnetic core in a manner of position correspondence to form a magnetic coreshaft column; each magnetic core shaft column is sleeved with the primary power winding, the secondary power winding and the shielding winding; the shielding winding comprises a primary shielding winding and a secondary shielding winding; and the primary shielding winding and the secondary shielding winding are stacked up and down and the spacing distance is h. According to the transformer, a lowresistance return channel is provided for primary noise coupled to a secondary side through adding the shielding winding and replacing a crossover Y capacitor to solve the problem of EMC; the cost andthe volume of the transformer can be reduced; and a hidden danger of leakage current is avoided.

The invention discloses a Pd-based variable capacitive hydrogen sensor and a preparation method thereof. A SiO2 layer grows on a substrate doped single crystal Si in a heat oxidation manner, a deposition hole is formed in the SiO2 layer in a penetrating manner, movable electrode Pd-based materials are deposited in the deposition hole, a vent groove communicated with the deposition hole is formed in the upper surface of the SiO2 layer, and a stationary electrode conducting panel is bonded on the SiO2 layer. Under the condition existing hydrogen, a Pd-based movable electrode in the sensor absorbs the hydrogen to generate reversible volume expansion, the distance between a movable electrode and a static electrode is shortened, and capacitance is enlarged, so that hydrogen concentration is monitored. The deposition hole of the sensor has a horizontal restraint function, volume expansion of the Pd-based movable electrode is accumulated to the height direction, sensor response is improved, response time of the sensor is effectively shortened, and the sensor is manufactured by the aid of standard Si-based micromachining process, so that the sensor is low in cost and power consumption, can be produced in batches and has a wide market prospect.

The invention discloses a composite surge protection device with double arc extinguishing. The composite surge protection device with the double arc extinguishing comprises a first arc extinguishing protection module and a second arc extinguishing protection module, wherein the first arc extinguishing protection module is a self-blowing arc extinguishing type graphite gap surge protection device, and the second arc extinguishing protection module is formed by connecting a piezoresistor and a discharge tube in series; the second arc extinguishing protection module is located above the first arc extinguishing protection module, and the first arc extinguishing protection module and the second arc extinguishing protection module are connected in parallel to form the composite surge protection device with double arc extinguishing. Through the first arc extinguishing protection module and the second arc extinguishing protection module which are arranged in parallel, arc extinguishing functions are added to the two protection modules, so that the composite surge protection device has high follow current interruption capability and is free of leakage current, the performance of the composite surge protection device is improved, and the service life of the composite surge protection device is prolonged.

The disclosed electronic equipment uses half bridge rectification circuit instead of full bridge rectification circuit in current technique. Even if electronic equipment includes some capacitors. One end of capacitor is connected to an output end of a rectification circuit; and the other end is connected to conducting material of electronic equipment possible to be touched by human; then leakage current will not be generated so as to raise user's experience for using electronic equipment.

The invention provides an electrocardiogram detection device and a detection circuit, and belongs to the technical field of electronics. A housing of the electrocardiogram detection device may be made of a conductive material, and the electrocardiogram detection device may include a voltage holding circuit for providing a target potential to the housing. Due to the fact that the potential difference between the target potential provided by the voltage holding circuit and the reference potential provided by the electrocardiogram detection circuit for a third electrode is small, even if a user touches the housing by mistake in the ECG detection process, and consequently, the housing and the third electrode are conducted, no leakage current is generated between the housing and the third electrode or the generated leakage current is small, so that the interference to the ECG signal can be effectively reduced, and the ECG detection accuracy is ensured.

The invention provides a sensor microphone output protection circuit and a sensor microphone. Wherein the sensor microphone comprises an amplification output circuit, a power supply end and an audio output end, the amplification output circuit is electrically connected with the power supply end and the audio output end, the sensor microphone output protection circuit comprises a voltage detection module, a low-power trigger module and a switch module, and the detection end of the voltage detection module is connected with the power supply end. The output end of the voltage detection module is electrically connected with the controlled end of the low-power trigger module, and the controlled end of the switch module is electrically connected with the low-power trigger module. The invention aims to eliminate the abnormal audio signal output by the sensor microphone when the voltage is not enough or the battery is attenuated and is out of power when the sensor microphone is powered on.

The invention relates to the technical field of traffic power supply equipment, and specifically relates to electric sliding contact tracks of a ground inflatable streetcar, which is characterized by comprising a safety protective box, a hollow sliding track slot body, the electric sliding tracks, pole separating plates, a supply station and an air compression station, wherein the safety protective box is formed by mutually crossing and fixing a base, a left side plate on the left side of the base and a right side plate on the right side of the base, the hollow sliding track slot body is arranged in the safety protective box, inflating holes are horizontally formed in the hollow sliding track slot body, hollow sliding track slots are formed in the side faces or end faces of the hollow sliding track slot body, the adjacent inflating holes are mutually communicated, the air compression station is connected with the inflating holes, three sliding track pole separating grooves are formed in parallel in the hollow sliding track slot body, the pole separating plates are fixed in the sliding track pole separating grooves, the electric sliding tracks are arranged between adjacent pole separating plates, and the electric sliding tracks are connected with the supply station. The electric sliding contact tracks of the ground inflatable streetcar have the advantages of novel structure, safe operation, fast construction progress, no interference signal, no leakage current, low assembly cost and the like.

The invention discloses a novel liquid injection system used for a storage type battery. The novel liquid injection system comprises a battery case, a liquid storage tank, a liquid injection valve, a gas generator and a vent valve, wherein the battery case is internally provided with a battery case cavity, a plurality of battery monomers as well as a common flow passage and a common air passage which are communicated with the gas generator; a cavity liquid injection hole is formed between the battery case cavity and the common flow passage, and battery monomer liquid injection holes are formed between the battery monomers and the common flow passage; the hole diameter of the cavity liquid injection hole is smaller than that of each battery monomer liquid injection hole; a cavity vent hole is formed between the battery case cavity and the common air passage, and vent pipes are arranged between the battery monomers and the common air passage; the liquid storage tank comprises a liquid outlet and an air inlet; the liquid injection valve comprises a liquid injection valve inlet communicated with the liquid outlet and a liquid injection valve outlet communicated with the common flow passage; and the vent valve comprises a vent valve air outlet communicated with the air inlet and a vent valve air inlet communicated with the common air passage. The novel liquid injection system is uniform in liquid injection, the common flow passage is free of electrolyte residue, and no leakage current is generated during battery discharging.

The invention discloses an electromagnetic heater power with the over-voltage protection function. The electromagnetic heater power includes a circuit, wherein the circuit is electrically connected with an overvoltage and undervoltage protection circuit, the circuit is electrically connected with a circuit board, the overvoltage and undervoltage protection circuit is electrically connected with anovervoltage and undervoltage protection circuit board, the overvoltage and undervoltage protection circuit board has an overvoltage and undervoltage protection circuit board; or the overvoltage and undervoltage protection circuit board has two sub overvoltage and undervoltage protection circuit boards, and one overvoltage and undervoltage protection circuit board has an overvoltage and undervoltage protection circuit; or one overvoltage and undervoltage protection circuit board has two sub overvoltage and undervoltage protection circuits, and the two sub overvoltage and undervoltage protection circuit boards respectively have sub overvoltage and undervoltage protection circuits. The electromagnetic heater power is advantaged in that when a supply voltage is too high or too low, power supply can be cut off quickly, and an insulated gate bipolar transistor (ie: IGPT) is prevented from being burned out.

The invention relates to a split type high-pressure cavity structure for comprehensive dielectric property measurement and a measurement method thereof. The split type high-pressure cavity structure comprises an anti-expansion protection steel sleeve, an epoxy glass fiber sleeve, a first connecting hole and a second connecting hole, the epoxy glass fiber sleeve is sleeved with the anti-expansion protection steel sleeve, and the first connecting hole is located above the second connecting hole; and the anti-expansion protection steel sleeve and the epoxy glass fiber sleeve are each of an up-down split structure, and the split interface of the anti-expansion protection steel sleeve and the split interface of the epoxy glass fiber sleeve are both located below the first connecting hole. When a polymer flat plate sample is tested, the polymer flat plate sample is positioned below the split interface of the epoxy glass fiber sleeve; and the epoxy glass fiber sleeve is made of glass fibers. Compared with the prior art, the risk that a polymer flat plate sample is extruded to peripheral gaps under high pressure intensity is prevented, the epoxy glass fiber composite material is adopted as an inner layer sleeve material, and the accuracy of a comprehensive dielectric property measurement result is ensured due to the good insulating property of the epoxy glass fiber composite material.

The invention provides a method for preparing a self-aligned silicide of a metal-oxide-semiconductor (MOS) transistor. In the invention, an ion implantation step is performed before the metal-oxide-semiconductor transistor is subjected to self-aligned silicide treatment, and the implanted Ions (such as: fluorine, chlorine, bromine, iodine, boron and boron difluoride) will first react with the silicon substrate and the surface of the gate, and produce a barrier effect (barrier efreet) in the silicidation process, which can prevent cobalt metal or It is cobalt silicide that infiltrates into the gate or source / drain region to produce a spike phenomenon, which avoids causing junction leakage or reducing the breakdown voltage of the metal oxide semiconductor transistor.

The invention discloses a series-connection combined type surge protector. A pair of arc gaps are formed in an insulating housing; the clearance of the two arc gaps is controlled by the thickness of an insulating gasket, which can be adjusted to determine the protecting voltage of the surge protector; a group of appropriate varistors are further connected in series; the normal current and the ground are isolated by the clearance in a normal state, and the arc extinction is carried out by the varistors in an actuating state; a low-temperature alloy tripping display mechanism is further connected with the varistor combination in series; and when the varistors deteriorate, fail and emit heat to reach a certain temperature, the low-temperature alloy melts, the tripping mechanism actuates, and an alarm is displayed on the housing surface of the surge protector. The surge protector has the advantages that the protection function is strong, the actuating time is short, the after flow is avoided, the arc extinction can be carried out under the condition that the power current is not over zero, the current leakage is avoided, the voltage protection level is low, the service life is long, and the surge protector can protect electrical wires and products against damage caused by direct lightning (10 / 350 mus) and indirect lightning (8 / 20 mus) waveform surges at the same time.

The invention discloses a current detection circuit which has few elements, is good in detection effect and comprises a circuit. The circuit comprises a power source, a switch, an MOS (metal oxide semiconductor) transistor and a motor, a microprocessor, a first resistor and a diode are further arranged in the circuit, an electrode D of the MOS transistor is connected with the motor, an electrode S of the MOS transistor is connected with a cathode of the power source, a second resistor is connected between an eighth pin and a seventh pin of the microprocessor, one end of the first resistor is connected with the eighth pin of the microprocessor, the other end of the first resistor is connected with an anode of the power source, an anode of the diode is connected with the seventh pin of the microprocessor, a cathode of the diode is connected with the electrode D of the MOS transistor, and an electrode G of the MOS transistor is connected with a fifth pin of the microprocessor by a third resistor. The current detection circuit has the advantages that the microprocessor can be effectively protected from interference of high voltage and the motor owing to the unilateral conductivity of the diode, the diode is extremely high in back resistance and is nearly free of leak current, and accordingly the performance of the diode can be played to the greatest extent by the current detection circuit.

The invention relates to a split-type high-voltage strong cavity structure and a measurement method for comprehensive dielectric performance measurement, comprising an anti-swell protection steel sleeve, an epoxy glass fiber sleeve, a first connection hole and a second connection hole, and an anti-swell protection steel sleeve. The sleeve is arranged on the outside of the epoxy glass fiber sleeve, and the first connection hole is located above the second connection hole. The split interface of the epoxy glass fiber sleeve is located below the first connection hole; when testing the polymer flat sample, the polymer flat sample is located below the split interface of the epoxy glass fiber sleeve; the epoxy glass fiber sleeve is made of glass fiber. Compared with the prior art, the present invention prevents the risk that the polymer flat sample will be extruded to the peripheral gap under high pressure, adopts epoxy glass fiber composite material as the inner layer jacket material, and its good insulation performance ensures the comprehensive dielectric performance. Accuracy of electrical performance measurements.

The invention provides a method for forming a storage device, comprising: providing a semiconductor substrate, on which a first dielectric layer with an opening is formed, a tunneling dielectric layer is provided at the bottom of the opening, and semiconductor layers on both sides of the opening Forming an active region and a drain region in the substrate; forming a floating gate on the tunnel dielectric layer, a second dielectric layer on the floating gate, and a gate on the second dielectric layer in the opening. control grid. The formation method of the storage device of the present invention can avoid over-etching the substrate, avoid leakage current, and improve the performance of the storage device.

The invention relates to an arrangement for overload protection for overvoltage protection equipment, consisting of at least one type II overvoltage arrester with or without a thermal disconnecting device that responds in the case of overload. According to the invention, a switching unit free of movable contacts is connected in series with the at least one overvoltage arrester and structurally combined therewith, which switching unit has at least two stationary switching contacts located at a small distance, wherein the distance of the switching contacts is specified in such a way that, in thecase of every surge current event or arresting event, the switching device goes into a quasi closed state because of the arc formed; in contrast, in the idle state the voltage of the connected network drops at the switching device, whereby the overvoltage arrester lying in series remains free of leakage current.