30 results about "Grounded capacitor" patented technology

A phase-locked loop circuit includes an oscillator including a plurality of capacitor cells, and a control logic circuit that receives an output from the oscillator. The control logic circuit compares a target frequency with a first frequency of a first signal output from the oscillator, generates a first input code to control at least a portion of the plurality of capacitor cells to output a signal having the target frequency based on the comparison, generates a first output code corresponding to the first input code when the first input code is within a predetermined range of input codes, and controls at least two capacitor cells from among the plurality of capacitor cells based on the first output code. The oscillator may output a second signal having a second frequency through an electrical path including capacitor cells other than grounded capacitor cells from among the plurality of capacitor cells.

The utility model discloses a miniaturized LTCC low-pass filter with high out-of-band rejection, and the interior of a ceramic substrate is provided with an inner electrode, three inductors of an inductor layer and three parallel capacitors of a first capacitor layer form three resonators, and three transmission zero points are formed; the second capacitor layer and the third capacitor layer form a cross coupling capacitor, the third capacitor layer and the grounding layer form four grounding capacitors, and the three resonators are connected with one another and form a seven-order low-pass filter together with the four grounding capacitors; the bottom of the ceramic substrate is provided with an external electrode port, the external electrode port comprises two input / output ports and a grounding electrode port, the resonators are connected with the input / output ports, and the grounding capacitor is connected with a grounding point and the ports. According to the technical scheme, high suppression of multiple frequency multiplication is achieved, high-frequency warping points are suppressed, high-frequency stop-band suppression of the filter is improved, and the filter has the advantages of being small in size, low in loss, high in integration level, high in reliability and capable of being produced on a large scale.

The invention discloses a compact Marx generator based on an impact ionization semiconductor device, and relates to the field of a pulse power technology and a power semiconductor device crossing technology. Comprising N stages of sub Marx generators which are cascaded in sequence, and each sub Marx generator comprises an impact ionization semiconductor device, a first charging isolation element, a second charging isolation element, an energy storage unit, a first ground capacitor and a second ground capacitor; for any stage of sub Marx generator, the first end of the impact ionization semiconductor device is connected with the first end of the first charging isolation element, the first end of the first ground capacitor and the first end of the energy storage unit, the second end of the first ground capacitor is grounded, the second end of the impact ionization semiconductor device is connected with the first end of the second charging isolation element, and the second end of the second charging isolation element is grounded. The second end of the second charging isolation element is connected with the second end of the energy storage unit and the first end of the second ground capacitor, and the second end of the second ground capacitor is grounded. According to the compact Marx generator, the conduction safety is improved.

Technologies and implementations for a voltage management circuit. The voltage management circuit may be configured to facilitate management of behavior of electronic devices including management of process corners associated with semiconductor integrated circuit devices. The technologies and implementations may facilitate a controlled amplitude for a signal that may be configured to push a negative ground capacitor. The amplitude may decrease as a process corner becomes faster.

The invention discloses a capacitance equivalent modeling method for lightning stroke response of a triangular connection side of a three-phase transformer, and the method comprises the steps: forming a triangular topology for a three-phase coupling network model based on the ground capacitance and turn-to-turn capacitance of a winding at the triangular connection side through node connection, precisely simulating the inter-phase coupling in a lightning stroke transient state, and obtaining the lightning stroke response of the triangular connection side; the method can effectively reflect the high-frequency capacitance characteristics of the triangular connection side of the three-phase transformer, determines the capacitance parameters of the three-phase coupling network model through the frequency domain impedance measurement and capacitance calculation mathematical model, improves the accuracy of the capacitance parameters, provides a more reliable basis for lightning stroke protection design, and improves the reliability of lightning stroke protection design. The technical problem that the prediction precision is insufficient in a high-frequency transient state due to the fact that existing transformer lightning stroke modeling neglects the inter-phase coupling effect in triangular connection of a three-phase transformer and does not fully consider the complex influence of a winding series-parallel connection structure on capacitance parameters is solved.

A noise filter comprises a first ground capacitor, provided between a positive electrode busbar and ground, connected to the positive electrode busbar via a positive electrode connection and to ground via a ground connection; and a second ground capacitor, provided between a negative electrode busbar and ground, connected to the negative electrode busbar via a negative electrode connection and to ground via a ground connection. Furthermore, each of the positive and negative electrode connections is arranged such that it is stacked on top of the ground connection.Furthermore, the first ground capacitor and the second ground capacitor are arranged at one end of each of the positive electrode wiring, the negative electrode wiring, and the ground wiring, which are arranged in a stacked configuration. A first connection section between the positive electrode busbar and the positive electrode wiring, a second connection section between the negative electrode busbar and the negative electrode wiring, and a third connection section between the ground side and the ground wiring are also arranged at another end of each of the wiring connections.

The application discloses a GaNHemt radio frequency switch control circuit and a control method, which comprises ground capacitors C1, C2 and C3, pull-down resistors R2 and R3, a delay resistor R1, voltage division resistors R4, R5, R6, R7, R8 and R9, and six MOS transistors. The MOS transistors are used as switching devices, TTL control high negative voltage can be realized, the negative voltage can reach about -60V, a faster voltage control scheme can be provided for the current GaN device, the timing sequence of the traditional control, i.e. the time response problem, is solved, the GaN radio frequency switch is controlled through single logic, and logic space is saved; the hardware delay resistor is used to avoid the jitter problem caused by uncertain control timing, and the problem that the GaNHemt tube cannot be controlled due to gate leakage in application can be solved.

A charging cable integrated with the function of intelligent switching between storage and power supply. The charging cable comprises a storage circuit board (4), a power control board (3), an uplink device interface (1) and a downlink power supply interface (2), wherein the power control board (3) comprises a buck compensation circuit (32) and a power switching circuit (31); the uplink device interface (1) and the downlink power supply interface (2) are electrically connected to the power switching circuit (31); the power switching circuit (31) is connected in series to the buck compensation circuit (32) to supply power to the storage circuit board (4); the power switching circuit (31) realizes switching between supplying power from the uplink device interface (1) to the storage circuit board (4) and supplying power from the downlink power supply interface (2) to the storage circuit board (4); several grounded capacitors (321) are provided between the buck compensation circuit (32) and the storage circuit board (4) and between the power switching circuit (31) and the storage circuit board (4); and the capacitors (321) supply power to the storage circuit board (4) during discharge. With regard to the charging cable, when a device connected to the uplink device interface (1) is performing storage and read / write operations, the downlink power supply interface (2) is connected to an external power source or stops power supply, such that seamless power source switching is realized by means of the compensation of the capacitors (321), thereby preventing unexpected termination of operations caused by the power-down of a memory of the storage circuit board (4).

A noise filter (1) is provided with: a first ground capacitor (210) that is located between a positive electrode bus bar (6) and a ground side, is connected to the positive electrode bus bar via a positive electrode wiring (610), and is connected to the ground side via a ground wiring (810); and a second ground capacitor (220) that is located between a negative bus bar (7) and the ground side, is connected to the negative bus bar via a negative wiring (710), and is connected to the ground side via the ground wiring, the positive wiring and the negative wiring being disposed so as to be stacked with respect to the ground wiring, and the positive wiring and the negative wiring being disposed so as to be stacked with respect to the ground wiring. The first ground capacitor and the second ground capacitor are disposed on one end side of each of the positive electrode wiring, the negative electrode wiring, and the ground wiring disposed in a stacked manner. A first connection portion in which the positive bus bar and the positive wiring are connected, a second connection portion in which the negative bus bar and the negative wiring are connected, and a third connection portion in which the ground side and the ground wiring are connected are disposed on the other end side of each wiring.

The invention provides a broadband bidirectional amplifier chip, equipment and a method based on a gallium arsenide process, and belongs to the technical field of integrated circuits. The chip adopts a monolithic integrated structure and comprises a first low-noise amplifier and a second low-noise amplifier which are symmetrically arranged, a first switch switching network and a second switch switching network which are respectively arranged at the input end and the output end of the chip, and a logic control circuit. The logic control circuit is powered by a positive single power supply, and converts an external control signal into a TTL level to control a switching network, thereby realizing selection and bidirectional amplification of a signal receiving and transmitting path. The low-noise amplifier adopts an improved cascode structure, and high gain, low noise and good gain flatness are realized in a frequency band of 0.5-6GHz through collaborative design of a resistor-capacitor-inductor feedback network, a peaking inductor and a grid-to-ground capacitor. The problems that a traditional discrete scheme is large in size and poor in consistency and a traditional gallium arsenide circuit needs negative-voltage power supply are solved, and the gallium arsenide circuit has the advantages of being high in integration level, low in power consumption, simple in power supply and the like.

A method for reducing inrush current to an ungrounded capacitor bank when re-closing a switching device. The method includes opening the switching device, including breaking the current of a first phase of the three phases, and after a predetermined opening time period simultaneously breaking the currents of a second phase and a third phase of the three phases. The method also includes re-closing the switching device, including simultaneously making the respective currents of the second and third phases, and after a predetermined closing time period making the current of the first phase.

This invention belongs to the field of induced polarization detection technology, and provides an air-to-ground capacitive non-contact spectral induced polarization detection system and method. Multiple power supply electrodes are spaced along the detection route, and a capacitor plate acquisition module is mounted on the UAV flight module. The UAV flight module and mobile platform unit are controlled to travel along the detection route. Excitation signals with preset amplitude, current, voltage, and / or frequency are sent to the power supply electrodes, and feedback data generated by the capacitor plate acquisition module is acquired. Based on the feedback data, the optimal detection flight altitude is calculated. After all measurement points are detected, the acquired full-band data is comprehensively processed and imaged to generate an apparent resistivity distribution map and polarization parameter profile of the subsurface medium, obtaining the electrical information of the surface. This invention can quickly acquire surface and shallow subsurface electrical information over a large area and is suitable for efficient induced polarization detection under various terrain conditions.

A power supply circuit for a communication bus. The power supply circuit includes a power output interface for connecting to the communication bus, a power converter circuit for supplying the power output interface with power and a first grounding capacitor. The first ground capacitor connects the power output interface to a ground reference. The power supply circuit further comprises a unidirectional conduction component connected in series with the power output interface, the first ground capacitor and the ground reference. The unidirectional conduction component is adapted to prevent the first grounding capacitor from bidirectionally buffering a signal on the communication bus via a different power supply circuit connected to the communication bus and the ground reference (PE) and via the ground reference or the first grounding capacitor is electrically connected in series with the power output interface and the ground reference.

A slew rate control circuit includes a ground wire, a power wire, an output end, two switches, two switching circuits, and two grounding capacitors. The switches are respectively connected between the power wire and the output end and between the output end and the ground wire. The switching circuits are respectively connected between the power wire and the ground wire and controlled by two driving signals and thus inversely driven. One of the switching circuits is configured to drive one of the switches through the first resistance, and the other is configured to drive the other one of the switches through the second resistance. One of the grounding capacitors is connected to a control end of the first switch and one of the switching circuits, and the other is connected to a control end of the second switch and the other one of the switching circuits.

A power amplifier includes an amplifying circuit, a feedback circuit and a grounding capacitor. The amplifier circuit includes at least a first transistor and a second transistor. A control terminal of the first transistor is configured to receive an input signal, a first terminal of the second transistor is coupled to the first transistor, and a second terminal of the second transistor is configured to generate an output signal. The feedback circuit is coupled to the control terminal of the first transistor and the second terminal of the second transistor. The ground capacitor is configured to couple the control terminal of the second transistor to ground. When a frequency of the input signal is between a first band and a second band, an amplification gain of the output signal relative to the input signal is substantially the same.

The invention discloses a lightning indirect effect and HIRF protection device based on a high-voltage power supply, and the device employs a three-stage protection mode: a first-stage protection circuit employs a transient voltage suppressor (TVS), and is used for suppressing the transient overvoltage in the whole protection circuit; the second-stage protection circuit adopts a low-pass filter and is used for filtering interference signals of which the bandwidth frequency is beyond 500kHz-10MHz; the third-stage protection circuit adopts a combined circuit structure of feed-through capacitors and double-row grounding capacitors of the circuit board and is used for filtering bandwidth frequency gt; 70MHz interference signals can be obtained. According to the invention, the lightning indirect effect and HIRF combined protection of the electromechanical equipment is realized.

According to the electrostatic discharge circuit for the ultra-high-definition two-path image divider, the electrostatic detection circuit detects an electrostatic charge signal of the space where the circuit board is located, the electrostatic charge signal is converted into voltage, the change rate of the voltage is calculated, and when the voltage is higher than the voltage stabilization value 1.2 V of a voltage-regulator tube TVS4 and smaller than + 1.4 V, the electrostatic discharge circuit controls static electricity to be discharged through an anti-electricity ring in time, so that the circuit is safe and reliable. When the voltage value of the electrostatic protection circuit is 1.2 V higher than the voltage stabilization value of a voltage-regulator tube TVS4 and 3.3 V higher than the voltage stabilization value of the voltage-regulator tube TVS4, static electricity is discharged to the ground through a discharge tube BV1, a piezoresistor and a discharge capacitor C7, meanwhile, a voltage change rate signal accelerates connection of the discharge tube BV1 through inverse time limit, and the electrostatic protection circuit protects a post-stage chip by arranging a ceramic discharge tube TVS1. RGB888 signals of the two interfaces are respectively connected to the ground through transient suppression diodes TVS3 and TVS2 to perform ESD protection, and then are respectively connected to the image processing chip through a buffer F1 / an inverter F2 and a grounding capacitor to adjust signal level and avoid transmission crosstalk, and IO ports of the image processing chip are respectively and reversely connected with diodes, potentiometers and anti-electricity rings to perform discharge.

A power conversion device includes an input port configured such that external power is input thereto through an input terminal, and an input port cover provided at one end of the input port to seal the one end of the input port and including a busbar, one end of the busbar is in contact with the input terminal and the other end is grounded, and the capacitor is disposed between the one end and the other end of the busbar.

The invention discloses a connector circuit, a control circuit and a voltage conversion rate control circuit thereof. The voltage conversion rate control circuit comprises a ground wire, a power line, an output end, two switches, two switching circuits and two ground capacitors. The two switches are respectively connected between the power line and the output end and between the output end and the ground wire. The two switching circuits are individually connected between a power line and a ground line, and are respectively controlled by two driving signals to be driven in an inverted manner. One of the two switch circuits is used for driving one switch through a first resistance value, and the other switch circuit is used for driving the other switch through a second resistance value. One of the two ground capacitors is connected with the control end of one switch and one switching circuit, and the other ground capacitor is connected with the control end of the other switch and the other switching circuit.

The utility model provides a protection filter circuit used for a Type-C interface, comprising a plurality of ESD protection diodes, a plurality of common mode inductors and a plurality of grounding capacitors, the ESD protection diodes, the common mode inductors and the grounding capacitors are arranged close to a Type-C interface CN1, the Type-C interface CN1 is electrically connected with one end of the ESD protection diodes and one end of the common mode inductors, and the other end of the common mode inductors is electrically connected with the Type-C interface CN1. The other ends of the common-mode inductors are connected with one ends of the grounding capacitors and a main control chip U1 of the intelligent electronic equipment, the other ends of the grounding capacitors are grounded, and the plurality of common-mode inductors and the plurality of grounding capacitors form a plurality of LC filters which are connected in parallel. The high-frequency noise suppression circuit has the beneficial effects that the plurality of common-mode inductors and the plurality of grounding capacitors can remarkably suppress high-frequency noise between the main control chip U1 and the Type-C interface CN1 of the intelligent electronic equipment, and the high-frequency noise suppression circuit is simple in structure, low in cost and small in size.

The bandpass filter (100) provided by the present invention includes filter circuits (FC1, FC2), intermediate circuits (MC1, MC2), and a capacitor (C51). The intermediate circuit (MC1) has an inductor (L31) connected between capacitors (C31 and C32). The intermediate circuit (MC2) has an inductor (L41) connected between capacitors (C41 and C42). The resonant circuits (RC1, RC2) included in the filter circuit (FC1) are grounded via a common capacitor (C61). The resonant circuits (RC3, RC4) included in the filter circuit (FC2) are grounded via a common capacitor (C62). The capacitor (C51) is connected between the intermediate circuits (MC1) and (MC2).

A power conversion device (1) comprises: a first switch (10) having a first terminal connected to a first power supply line (21) and a second terminal connected to a second power supply line (22); and a suppression circuit (15) connected in parallel to the first switch (10). The first switch (10) is driven at a predetermined switching frequency (fsw). In the suppression circuit (15), a sub-resonance circuit (13) and a second switch (14) are connected in series. The resonance frequency of the sub-resonance circuit (13) is set to a value higher than the switching frequency (fsw). A first ground capacitor (C31) is provided between a first terminal (D) of the first switch (10) and a ground potential (GND), and a second ground capacitor (C32) is provided between the first terminal (D) of the second switch (14) and the ground potential (GND). The capacitances of the first ground capacitor (C31) and the second ground capacitor (C32) are substantially equal.

This invention relates to an IPD low-pass filter with a wide stopband, comprising inductors L1, L2, and L3. Inductor L1 is connected to the input terminal, and inductor L3 is connected to the output terminal. A grounding capacitor C1 is connected between inductors L1 and L2, a grounding capacitor C2 is connected between inductors L2 and L3, and a grounding capacitor C3 is connected between inductor L3 and the output terminal. This invention introduces a transmission zero through the mutual inductance between the two inductors on the main path, avoiding the increase in circuit complexity and losses caused by introducing more capacitors or inductors, and also avoiding the introduction of additional resonance near the passband. A pair of notch filter resonators is added at both the input and output terminals. The introduction of these notch filter resonators suppresses higher-frequency high-order modes, ultimately achieving a wide stopband.

The invention provides a grounding detection method and a power converter. The power converter comprises an inverter circuit; the direct-current side of the inverter circuit is connected with a positive direct-current bus and a negative direct-current bus, a first capacitor and a second capacitor are connected between the positive direct-current bus and the negative direct-current bus, and the connecting point of the first capacitor and the second capacitor is connected with the grounding end of the machine shell; an alternating current side phase line of the inverter circuit comprises a neutral line; the neutral line is connected with a grounding end of the casing through a grounding capacitor; the inverter circuit comprises a first bridge arm and a second bridge arm, the first bridge arm comprises a first upper bridge arm and a first lower bridge arm, and the second bridge arm comprises a second upper bridge arm and a second lower bridge arm; the detection method comprises the following steps: controlling a switching device of any bridge arm to act, and switching devices of other bridge arms to be switched off so as to generate potential disturbance between a grounding end of a machine shell and a neutral line; and when the voltage between the grounding end of the casing and the neutral line is greater than a preset threshold value, determining that the grounding end of the casing is abnormal in grounding. According to the scheme, the accuracy of power converter grounding state detection can be improved.

The utility model discloses a transformer winding deformation fault simulator, and belongs to the field of winding deformation fault simulation. The problem that an existing simulator cannot restore real winding characteristics and cannot achieve three-phase collaborative testing is solved. The simulator comprises an analog circuit module and a switch control module. The analog circuit module is constructed based on a transformer winding equivalent circuit and comprises an input end, an output end, inductor assemblies connected in series, ground capacitor assemblies connected in parallel and inter-cake capacitor assemblies. The switch control module comprises a plurality of single-pole double-throw switches, and movable contacts of the single-pole double-throw switches are respectively connected to adjusting nodes of the inductor assembly, the ground capacitor assembly and the inter-cake capacitor assembly; the single-pole double-throw switch is used for switching the contact to change the capacitance or inductance value of the access circuit so as to simulate the normal state or the deformation fault state of the transformer winding; the output interface of the analog circuit module is configured to be connected with a frequency response tester and used for generating a frequency response curve. The method is mainly used in the power system safety field.

The embodiment of the utility model provides a charging system and charging equipment. The charging system comprises a DC bus, an AC-DC conversion circuit, a DC-DC conversion circuit, a plurality of power supply circuits and an inductor group. Wherein the AC-DC conversion circuit is used for converting received alternating current into direct current and outputting the direct current to the DC-DC conversion circuit through a direct current bus. Each power supply circuit comprises a direct-current power supply and a ground capacitor, the direct-current power supply is connected with the direct-current bus through the ground capacitor, and the direct-current power supply is used for outputting direct current to the DC-DC conversion circuit through the direct-current bus. And the DC-DC conversion circuit is used for performing power conversion on the direct current obtained from the direct current bus and then outputting the direct current. In addition, the direct current bus is connected with the AC-DC conversion circuit through the inductor group, or the direct current bus is connected with each power supply circuit through the inductor group. According to the embodiment of the invention, the operation reliability of the charging system when the DC bus is connected with the plurality of power supply circuits can be improved.

This utility model relates to the field of communications, specifically to a low-frequency band filter with high rectangularity and low flatness. It includes a bandpass filter and an amplitude equalizer connected to the bandpass filter. The bandpass filter includes an input inductor, a multi-order quasi-elliptic circuit, and an output inductor connected in sequence. The multi-order quasi-elliptic circuit includes multiple sets of parallel-grounded resonant units connected in sequence, each set being an inductor and capacitor connected in parallel to ground; parallel resonant units connected between every two sets of parallel-grounded resonant units, each parallel resonant unit being an inductor and capacitor connected in parallel; and inter-stage grounding capacitors connected between the parallel resonant units for adjusting in-band flatness. The amplitude equalizer includes two sets of high-band equalizers and one set of low-band equalizers connected in sequence. This utility model solves the problem that existing elliptic function structure filters cannot simultaneously satisfy high rectangularity and low in-band flatness.

The invention relates to the technical field of circuits, in particular to a unidirectional signal amplification topological circuit heterojunction based on a non-Hermite skin effect, which is formed by connecting a topological non-trivial region and a topological trivial region at an interface, every two adjacent nodes are connected through a first coupling element, every two secondary adjacent nodes are connected through a negative impedance converter, and each node is connected with a grounding capacitor or a grounding inductor; the topological trivial area is a rectangular circuit lattice, and every two adjacent nodes are connected through a second coupling element; and the boundary nodes of the topological non-trivial region are connected with the boundary nodes of the topological trivial region through third coupling elements, so that the problems of complex circuit structure, poor stability and easy noise interference caused by introduction of additional gain or loss terms for realizing the non-Hermi topology phenomenon are solved; the device has the advantages of simple structure, high stability and low noise.

The application discloses a high-power frequency modulation low-pass filter and a detection method thereof, relates to the technical field of low-pass filtering, and the high-power frequency modulation low-pass filter comprises a filter circuit of an eight-order Chebyshev topology structure, a flat coil inductor group wound by a silver-plated flat copper strip, a multilayer porcelain dielectric capacitor group and a power detection module; the filter circuit realizes 87-108MHz frequency band signal filtering through four-stage series connection of parallel resonance units, and each stage of the parallel resonance units is composed of a series inductor and a parallel ground capacitor; the power detection module is integrated in an output port and is used for monitoring incident power and reflected power in real time. The high-power frequency modulation low-pass filter has the incident and reflected power real-time monitoring capability while maintaining the high-performance filtering function, so that the safety and reliability of system operation are improved.

The embodiment of the invention provides an equivalent circuit of a spiral coil, a construction method of the equivalent circuit and impedance characteristic calculation, and belongs to the technical field of spiral coils. The equivalent circuit comprises a plurality of wire turn modules connected in series, and each wire turn module in the plurality of wire turn modules connected in series can comprise a wire turn resistance-inductance branch module, a wire turn in-turn capacitor connected with the wire turn resistance-inductance branch module in parallel, and wire turn ground capacitors connected between the two ends of the wire turn resistance-inductance branch module and the ground. The wire turn resistance-inductance branch module can comprise an inductor and a resistor which are connected in series. And wire turn inter-turn capacitors are connected in parallel at two ends of two adjacent wire turn modules to form an equivalent circuit of the spiral coil. According to the equivalent circuit structure of the spiral coil provided by the embodiment of the invention, an equivalent circuit for calculating the impedance characteristic of the spiral coil can be provided based on an equivalent circuit method of the impedance characteristic, and the equivalent circuit structure is simpler by adopting the representation of the turn-to-turn capacitance and the turn-in capacitance.