31results about How to "Reduce capacitive reactance" patented technology

The invention discloses a self-excited push-pull type converter which comprises a Royer circuit. An inductor connects a power supply terminal of the Royer circuit with a center tap of a transformer primary winding in the Royer circuit. An inductance value of the inductor is less than one-tenth of an inductance value of a primary winding in the transformer. The center tap of the primary winding isa connection point of two primary windings of the transformer. The self-excited push-pull type converter of the present invention has the characteristics of high consistency, easy debugging, low technology requirement, and good short circuit protection performance.

Disclosed herein is a built-in RFID tire tag. The built-in RFID tire tag includes an antenna and a circuit unit. The antenna is mounted in a tire, and is configured to be operated by resonating with radio waves, which are transmitted from an RFID reader and to have a repetitive corrugated shape. The circuit unit is configured to be operated by being supplied with power using the radio waves. The antenna includes a pair of tag radiators. Each of the tag radiators is divided into a first region and a second region. The corrugation density of the second regions, which are close to the circuit unit, is greater than that of the first regions, which are not close to the circuit unit. The first regions, which depend on rotational motion of the tire, adapt flexibly to bending and torsion of the tire by the difference between the corrugation densities.

The invention discloses a 5G communication 20GHz laser dual chip package base, which comprises a base body. A supporting member is arranged on the base body. A printed circuit board is arranged in the supporting member. A first laser chip and a second laser chip are arranged on the printed circuit board. The printed circuit board is printed with a hybrid microwave circuit with silver paste and a TEC circuit with Peltier paste. Two detectors PD for laser input current monitoring are mounted on the base body. The base body is also equipped with 50 ohm high-speed modulation electrical signal input pins, a detector PD input end pin, a TEC circuit input end pin and a ground output pin therein. The invention also discloses a preparation method thereof. According to the invention, the 40 GHz bandwidth for the single laser TO package is achieved. Thus, the cost is greatly reduced, the purpose of miniaturization is achieved, the compatibility with existing optical device standards is also achieved, and the popularity of the 5G network of high-speed optical devices is effectively promoted.

The invention discloses a touch display driving method for an embedded touch screen, which is used for improving the touch effect of the embedded touch screen. The touch display driving method for the embedded touch screen comprises the following steps: in the touch and control period, applying constant voltage V0 to each touch sensing electrode of the touch screen; and applying touch driving voltage V1 with the frequency of 5 to 20 MHz to each touch driving electrode of the touch screen so as to form an electric field between the touch sensing electrode with the applied voltage V0 and the touch driving electrode with the applied voltage V1 and realize the touch function.

The invention discloses an EMC device which includes an apparatus that is easily interfered by high frequencies. The apparatus that is easily interfered by high frequencies is connected with a capacitance in parallel. The invention is connected with a capacitance in parallel on the apparatus that is easily interfered by high frequencies; when the frequency is low, the action of the capacitance is weak; when the frequency is high, the condenser component of the capacitance is diminished, the high frequency interference picked by the apparatus that is easily interfered by high frequencies gets short by the capacitance and can not be continuously spread, thereby reducing the high frequency interference and improving the performance of the EMC device.

The invention belongs to the technical field of transient electromagnetic explorations and more particularly, to a coil for transient electromagnetic explorations and the application method thereof. The transmitting loops and the receiving loops are arranged on the same plane; among the transmission loops, among the receiving loops and among the transmission loops and the receiving loops, they all share the same central point. The turns of the transmission loops and the turns of the receiving loops are all arranged at some intervals; and the turns are all arranged in a spirally winding manner; and they are mutually embedded and sleeved. The numbers of the turns of the receiving loops are greater or equal to those of the transmitting loops. The turns of the transmitting loops can be either in series connection or in parallel connection; the turns of the receiving loops are in series connection only. The coil of the invention can be independently collected or released. And it is also portable. For the intervals among the receiving loops, under the condition that the number of the turns is a fixed one, it is possible to effectively reduce self-inductance and the distribution capacitance so as to shorten the transient process of the coil. In addition, as the transmitting loops and the receiving loops are mutually embedded and arranged at intervals. The mutual inductance coefficient of the two kinds of loops can be reduced so as to favorably obtain early effective signals, reduce the detection blind area in the shallow part, and improve the exploration in shallow layer, making the coil especially applicable to city engineering geophysical prospecting.

The invention provides an ultra-high-voltage GIS rapid transient overvoltage suppression system. The system comprises a metal tank, the inner part of the metal tank is provided with an isolation gap and unit modules connected with the isolation gap, the unit modules comprise resistors, capacitors, and metal bolts, and the resistors are connected with the capacitors via the metal bolts. According to the system, the inner part of the metal tank is provided with the isolation gap and the unit modules, when rapid transient overvoltage of GIS equipment does not occur, capacitive reactance of the isolation gap is high, a transient overvoltage suppression device can be regarded as an open circuit, and normal operation of the GIS is guaranteed; when rapid transient overvoltage of the GIS equipment occurs, the equivalent frequency of the transient overvoltage is high, the capacitive reactance of the isolation gap is low, the device can be regarded as a large load, and energy of rapid transient overvoltage in the GIS is consumed via the resistors so that the amplitude of the transient overvoltage is obviously reduced, and the technical problem of poor suppression effect of rapid transient overvoltage in the GIS in the prior art can be solved.

The invention relates to a high-frequency intelligent response electro-desalting power supply device to solve the problems of high consumption of electricity for refining crude oil, reduction of electric field strength, low effect of electric desalting and dewatering, and the like due to increase of electric field current when the crude oil with high water content, high conductivity or severe emulsification is treated through the conventional electric desalting and dewatering. The high-frequency intelligent response electro-desalting power supply device comprises an electric desalting and dewatering pot, an in-pot electrode plate, a high-frequency intelligent response control cabinet (comprising a bridge rectifier, a capacitor filter, an insulated gate bipolar translator (IGBT) module, a programmable logic controller (PLC) control protection circuit and a current and voltage monitoring circuit), and an explosionproof high-frequency transformer. According to properties of different oil products, different frequencies are selected, and the aim of breaking emulsion is fulfilled under lower electric field strength; therefore, the current is reduced and electric energy is saved.

The invention belongs to the technical field of transient electromagnetic explorations and more particularly, to a coil for transient electromagnetic explorations and the application method thereof. The transmitting loops and the receiving loops are arranged on the same plane; among the transmission loops, among the receiving loops and among the transmission loops and the receiving loops, they all share the same central point. The turns of the transmission loops and the turns of the receiving loops are all arranged at some intervals; and the turns are all arranged in a spirally winding manner; and they are mutually embedded and sleeved. The numbers of the turns of the receiving loops are greater or equal to those of the transmitting loops. The turns of the transmitting loops can be either in series connection or in parallel connection; the turns of the receiving loops are in series connection only. The coil of the invention can be independently collected or released. And it is also portable. For the intervals among the receiving loops, under the condition that the number of the turns is a fixed one, it is possible to effectively reduce self-inductance and the distribution capacitance so as to shorten the transient process of the coil. In addition, as the transmitting loops and the receiving loops are mutually embedded and arranged at intervals. The mutual inductance coefficient of the two kinds of loops can be reduced so as to favorably obtain early effective signals, reduce the detection blind area in the shallow part, and improve the exploration in shallow layer, making the coil especially applicable to city engineering geophysical prospecting.

A differential amplifier, comprising a previous-stage drive level (106), an input balun (101), a matching network (102), a differential transistor pair (103), a bias network (104) and an output balun(105). An output end of the previous-stage drive level (106) is connected to an input end (203) of the input balun (101). An output end (205) of the input balun (101) is connected to an input end of the matching network (102), an output end of the matching network (102) is connected to an input end of the differential transistor pair (103) and the bias network (104), and an output end of the differential transistor pair (103) is connected to the output balun (105). The input balun (101) is a single-turn stacked transformer. The output balun (105) is a planar transformer with a full inner-frameand a half outer-frame. The input balun of the differential amplifier is a single-turn stacked transformer, and the output balun has a structure with a full inner-frame and a half outer-frame, so that the differential amplifier takes up less space, and has low loss, high operating frequency and better power amplifier efficiency.

The invention relates to a squeezing-type cable connector with a pin, which comprises a main body part and a sleeve part. A body comprises a tubular metal shell. One end of the shell is connected with a nut. By adopting a clamping ring for the connection between the shell and the nut, the rapid connection and the rapid separation of the shell and the nut can be realized and the maintenance of a cable in future is facilitated. A cable connecting position is arranged at the other end of the shell. The other end can be connected with the sleeve part. A groove is arranged at the position at which the shell and the sleeve are connected. The shell is connected with the sleeve in a clamping way. A jack is arranged at the middle section of the inner chamber of the shell. When the cable is installed in the shell from the connection position, by abutting the cable through the metal pin, the cable can be ensured to be effectively conducted. Moreover, since an inner core in the shell is of a reverse taper type, not only can the installation of the cable be facilitated, but also a certain effect of preventing the cable from slipping is taken.

The invention relates to a piezoelectric low-energy-consumption broadband warning device for an automobile. The piezoelectric low-energy-consumption broadband warning device comprises a shell, wherein an opening is formed on the upper end face of the shell, and a sound transmission hole is formed in the lower end face of the shell; an installation cavity is formed in the shell; a vibration base plate is fixedly arranged in the installation cavity of the shell; a composite piezoelectric sheet is arranged on the upper end face of the vibration base plate, and a vibration thin film is arranged on the lower end face of the vibration base plate; the vibration base plate and the composite piezoelectric sheet form a vibration base source; the vibration thin film and the vibration base plate form a sound transmission source; a circuit board is arranged in the opening of the upper end face of the shell; a flexible circuit board is arranged in the installation cavity of the shell; the circuit board is electrically connected with the flexible circuit board; and the flexible circuit board is electrically connected with the composite piezoelectric sheet. The piezoelectric low-energy-consumption broadband warning device for the automobile has the advantages that the composite piezoelectric sheet serves as the vibration base source, a spring steel material of which the thickness is 0.15 mm to 0.25 mm is hollowed out and serves as the vibration base plate, the molded composite piezoelectric sheet is attached to the vibration base plate, and a layer of polyester vibration thin film is attached to the lower part of the vibration base plate to form the vibration base source, so resonant frequency can reach 800 Hz, high frequency reaches 20,000 Hz, and the performance of a product is improved.

The application discloses a charge pump circuit, a control method and a display device. The charge pump circuit includes: an output terminal; at least one group of second capacitors, including a first capacitor, which outputs the first driving voltage or the second driving voltage through discharge Voltage, the second capacitor, charges the first capacitor by discharging and outputs the first driving voltage or the second driving voltage; and a switch module, used to control the output, control the charging and discharging of the second group of capacitors, and control Multiple input voltages are input to output multiple sets of first driving voltages and second driving voltages. When outputting the first driving voltage or the second driving voltage, the two external capacitors are not connected in series, the equivalent capacitance value does not decrease, and the capacitive reactance does not increase. The driving capabilities of the first driving voltage and the second driving voltage are the same. The first driving voltage and the second driving voltage are output to the driving circuit, and the driving circuit outputs the image signal to the display panel to complete image display.

The invention relates to the technical field of antenna equipment and provides a mobile low frequency transmitting antenna which comprises an antenna body in an inverted cone shape. The antenna body comprises a plurality of top wires and a plurality of lead wires. The four top wires are sequentially connected in an end-to-end way to construct the four sides of the top surface of the antenna body.The four lead wires respectively extend downward from the four corners of the top surface and converge to the bottom point to construct the bottom corners of the antenna body. The antenna body of themobile low frequency transmitting antenna is arranged in an inverted cone shape, which is equivalent to increasing the length of the antenna and can effectively reduce the capacitive reactance of theantenna to reduce the antenna voltage and increase the bearing power of the antenna. The conventional tower antenna of several hundred meters can be reduced to several tens of meters and can be more flexible and can be deployed in field positions according to requirements. Although the antenna efficiency is low and the radiation range is limited, the antenna can be used as a supplement to the fixed station and can also make up for the blind area of the fixed station.

The invention discloses a double-sound acousto-optic simulation electric firecracker, which comprises a circuit and a resonator for producing bright and explosive sounds; the explosive sound produced by the circuit for producing bright and explosive sounds is produced under the action of the resonator The high-pitched explosive sound and the low-pitched explosive sound, the circuit for generating light and explosive sound generates low-pitched explosive sound and high-pitched explosive sound successively through the resonator under the action of the control circuit. In the present invention, the blasting head mechanism utilizes the basic structure of the horn-type high-pitched horn, so that the airflow and sound generated by the electric spark can be transmitted, reflected, and resonated through the cavity of the high-pitched horn, and the multivibrous resonance with the resonator as a whole , to produce the sound effect of the first sound of "bang" similar to the second kick; the second blasting mechanism is equipped with a high-pitched blasting glass tube and an echo hole, and the airflow and sound generated by the electric spark are transformed by the second blasting mechanism to produce a "pop" ” sound, so as to realize the sound and light effect of electric firecrackers with two kicks.

The invention discloses a special power adapter for a loudspeaker. The power adapter comprises two connecting covers; the two connecting covers are detachably connected; protective devices are arranged on one sides of the two connecting covers; transformers are mounted in the two connecting covers; capacitors are arranged on one sides of the transformers; one sides of the transformers are connected with a neutral wire and a live wire; the other sides of the transformers are connected with a power wire; one sides of the capacitors are connected with a first ground wire; and the other sides of the capacitors are connected with a second ground wire. According to the special power adapter, the problem that a grounding loop of a wireless microphone to a power supply can only form a power loop through other equipment in a loudspeaker system can be avoided; the capacitive reactance of the grounding loop is reduced, so that when the power supply is converted into audio information, the influence on the frequency response characteristics of loudspeaker equipment is avoided; the occurrence possibility of noises can be effectively reduced, so that the audition enjoyment is improved; good protection performance is achieved; disassembly and maintenance are facilitated; and the service life is prolonged.

The invention relates to a crystal oscillating circuit, which comprises an oscillating stage circuit, a direct current negative feedback circuit, and a push-pull amplifier circuit. The oscillating stage circuit generates an oscillator signal and outputs the oscillator signal to the direct current negative feedback circuit; the direct current negative feedback circuit performs amplitude control on the oscillator signal of the oscillating stage circuit and feeds back the oscillator signal to the oscillating stage circuit; the oscillating stage circuit outputs the oscillator signal which is subjected to the amplitude control to the push-pull amplifier circuit by the direct current negative feedback circuit; and the push-pull amplifier circuit is a post-stage amplifying circuit, amplifies the oscillator signal which is input and subjected to the amplitude control and outputs the oscillator signal to the outside. According to the invention, a transistor V5 adopts an emitter follower, so that an output load of the crystal oscillating circuit is less, and oscillation starting of the crystal is facilitated; and the capacitance of a capacitor which is connected in series with the crystal is increased, so that the capacitive reactance of the capacitor in the circuit is reduced, an alternating current which runs through the crystal is increased, and the driving power of the crystal is increased.

The invention provides an ultra-high-voltage GIS rapid transient overvoltage suppression system. The system comprises a metal tank, the inner part of the metal tank is provided with an isolation gap and unit modules connected with the isolation gap, the unit modules comprise resistors, capacitors, and metal bolts, and the resistors are connected with the capacitors via the metal bolts. According to the system, the inner part of the metal tank is provided with the isolation gap and the unit modules, when rapid transient overvoltage of GIS equipment does not occur, capacitive reactance of the isolation gap is high, a transient overvoltage suppression device can be regarded as an open circuit, and normal operation of the GIS is guaranteed; when rapid transient overvoltage of the GIS equipment occurs, the equivalent frequency of the transient overvoltage is high, the capacitive reactance of the isolation gap is low, the device can be regarded as a large load, and energy of rapid transient overvoltage in the GIS is consumed via the resistors so that the amplitude of the transient overvoltage is obviously reduced, and the technical problem of poor suppression effect of rapid transient overvoltage in the GIS in the prior art can be solved.

A differential amplifier, comprising a pre-stage driver stage (106), an input balun (101), a matching network (102), a differential tube pair (103), a bias network (104) and an output balun (105); the pre-stage The output terminal of the driver stage (106) is connected to the input terminal (203) of the input balun (101); the output terminal (205) of the input balun (101) is connected to the input terminal of the matching network (102), and the output terminal of the matching network (102) is connected to the input terminal of the matching network (102). The input end of the differential tube pair (103) is connected to the bias network (104), and the output end of the differential tube pair (103) is connected to the output balun (105); the input balun (101) is a single-turn laminated transformer; the output balun (105) is the full-frame outer half-frame transformer in the plane. The input balun of the differential amplifier adopts a single-turn laminated transformer, and the output balun adopts an inner full-frame outer half-frame structure, so that the differential amplifier occupies a small space, has low loss, high operating frequency, and high power amplifier efficiency.

The invention discloses an anti-interference current and voltage acquisition method for a power system. The anti-interference current and voltage acquisition method adopts a voltage and current transformer used for converting external voltage and current into voltage output in the range of 0-3.53 V, and the output of the voltage and current transformer is connected with the input of an anti-interference circuit. The anti-interference current and voltage acquisition method comprises the steps that the voltage and current transformer inputs to the anti-interference circuit, the output of the anti-interference circuit serves as the input of a first-stage filter circuit and is input to an AD sampling chip, and then a CPU collects voltage and current data input by the AD sampling chip through adopting a Fourier algorithm. According to the anti-interference current and voltage acquisition method, the anti-interference capability is high, when the voltage and the current jitter, the maloperation of the device is not caused, and the stability of the whole system is ensured.

The invention provides an inductor having a metal filler structure. The metal filler structure at least includes: a plurality of metal blocks with the same height as a pin baseline and a plurality of metal wires in radial distribution; one ends of the metal wires are connected with the pin baseline to realize grounding, and the other ends are gathered in an area with no metal distribution and do not intersect; and the metal blocks and the metal wires do not contact. By optimizing the shape, the size and an interval of the metal blocks formed in an area of the inductor where metals are sparsely distributed, an eddy current effect of the metal blocks can be reduced, thereby effectively improving a quality factor of the inductor; and the metal wires in radial distribution are formed in other metal layers except a top layer, one ends of the metal wires are connected to the ground, achieving a function of a shielding layer, effectively reducing the eddy current effect of the metal filler structure, and greatly improving the quality factor of the inductor.

The invention provides a portable alternating-current and direct-current arc welding generator. The generator comprises an internal-combustion engine, a generator and a bridge rectifier, the generatoris composed of a stator and a rotor. The stator is arranged in the middle of the rotor to form an outer rotor generator; the stator is composed of a stator iron core and a winding. A rectangular groove is axially formed in the outer circle of the stator iron core; a stator winding is wound in a snake shape and embedded in the rectangular groove in the outer circle of the stator iron core in a layered mode, the diameter of enameled wires of the stator winding is matched with the width of the rectangular groove, each layer of enameled wires of the stator winding forms an independent loop, and the stator winding of the independent loop outputs different current densities or voltages in parallel or in series. The output end of the stator winding is connected with the alternating-current inputend of the bridge rectifier, and the direct-current output end of the bridge rectifier is connected with a filter capacitor in parallel. And under the condition that the rotating speed of the rotor is constant, the current output density is large, the quality is high, the carrying is convenient, construction is not limited by a power supply, the cost is low, and the popularization is facilitated.

The invention relates to a combination probes for testing integrated circuit, which comprises: single head probe (1) and terminal (2); the single head probe (1) includes head (13) and end tube (12) which has a spring in the cavity, the head (13) being inserted in the tube (12) inner cavity and moving relative to the tube (12); the upper part of the terminal (2) is hollow and a clamping part is provided in it, any end of the single head (1) being inserted into terminal (2) and its end part being clamped tightly by clamp; the other end of the single head probe (1), which is not inserted into the terminal (2), being electronic connected with the integrated circuit or circuit board for testing, correspondingly, the end (21) of the terminal (2) being employed for testing electronic connections of the testing circuit board or the integrated circuit. Compared with prior technology, the invention has the advantages of having low resistance, capacity reactance or inductive reactance.

The invention relates to a telescopic antenna capable of stretching. The telescopic antenna is characterized by comprising a hollow radiation rod, a guide cylinder sleeved in the radiation rod and capable of lifting and moving relative to the radiation rod, a top rod assembly connected above the guide cylinder and capable of synchronously lifting along with the guide cylinder, and a lifting mechanism connected between the radiation rod and the guide cylinder and used for driving the guide cylinder to lift and move. The guide cylinder and the top rod assembly can be driven by the lifting mechanism to lift and move relative to the radiation rod; when the antenna does not need to work, the top rod assembly can be controlled to be totally contracted into the radiation rod so as to achieve theeffects of preventing the rain, dust, air and the sun, avoiding ageing, facilitating packing and transportation and the like; and when the antenna needs to work, the top rod assembly can be controlled to rise to a proper position, the effective height of the antenna is greatly increased so as to achieve better communication effect.

The invention relates to a piezoelectric low-energy-consumption broadband warning device for an automobile. The piezoelectric low-energy-consumption broadband warning device comprises a shell, wherein an opening is formed on the upper end face of the shell, and a sound transmission hole is formed in the lower end face of the shell; an installation cavity is formed in the shell; a vibration base plate is fixedly arranged in the installation cavity of the shell; a composite piezoelectric sheet is arranged on the upper end face of the vibration base plate, and a vibration thin film is arranged on the lower end face of the vibration base plate; the vibration base plate and the composite piezoelectric sheet form a vibration base source; the vibration thin film and the vibration base plate form a sound transmission source; a circuit board is arranged in the opening of the upper end face of the shell; a flexible circuit board is arranged in the installation cavity of the shell; the circuit board is electrically connected with the flexible circuit board; and the flexible circuit board is electrically connected with the composite piezoelectric sheet. The piezoelectric low-energy-consumption broadband warning device for the automobile has the advantages that the composite piezoelectric sheet serves as the vibration base source, a spring steel material of which the thickness is 0.15 mm to 0.25 mm is hollowed out and serves as the vibration base plate, the molded composite piezoelectric sheet is attached to the vibration base plate, and a layer of polyester vibration thin film is attached to the lower part of the vibration base plate to form the vibration base source, so resonant frequency can reach 800 HZ, high frequency reaches 20,000 HZ, and the performance of a product is improved.

A self-excited push-pull converter, which comprises a Royer circuit, wherein an inductor is further connected between a supply terminal of said Royer circuit and a center tap of primary windings of a transformer in said Royer circuit, an inductance amount of said inductor is less than 1 / 10 of the inductance amount of one of the primary windings of the transformer, and the center tap of said primary windings is a connection point between the two primary windings of said transformer. The self-excited push-pull converter of the present invention show high consistency, easy adjustment, low requirements on the manufacturing process and good short circuit protection performance.

The invention discloses a data processing method, device, system and computer-readable storage medium based on the IIC protocol, comprising: receiving a control command sent by an IIC master device, and identifying the address for receiving the control command; A target function module corresponding to the address receiving the control instruction; using the target function module and the control instruction to realize the processing operation on the data in the storage system. The method, device, system and computer-readable storage medium provided by the present invention realize different functions according to a plurality of different addresses in the IIC slave device, and save system hardware cost.