45 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 application discloses a kind of hand-off detection method, system, controller and device of steering wheel, it is related to detection field, comprising: the first end and the second end of control sampling capacitor are connected with power supply first preset time, to be charged to ground capacitor and sampling capacitor, and obtain first voltage by acquisition end;The second end of control sampling capacitor is connected with ground first preset time, to be discharged to ground capacitor and sampling capacitor, and obtain second voltage by acquisition end;When the absolute value of the difference of first voltage and second voltage is greater than preset value, determine that the hand of user has not left steering wheel.By sampling capacitor and the detection of the capacitance of ground capacitor by controller, without integrated chip, can be changed by changing the capacitance of sampling capacitor to achieve change parameter, the degree of freedom of configuration is improved.At the same time, only by charging and discharging of the same time to determine the capacitance of ground capacitor and then determine whether the hand of user leaves steering wheel, the process of test is simpler.

A multi-feed antenna with a shared radiator comprises a ground capacitor, a first antenna module, a second antenna module, a first feed-in module, a second feed-in module and at least one sensing module. The first antenna module is grounded through the ground capacitor. The second antenna module is coupled with the first antenna module. The first feed-in module and the second feed-in module are connected with the second antenna module, and the first feed-in module and the second feed-in module are used to receive or send radio frequency signals through the first antenna module and the second antenna module. The at least one sensing module is connected with the first antenna module or the second antenna module, and the at least one sensing module is used to sense a capacitance value of a parasitic capacitance of the first antenna module or the second antenna module.

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.

In a π-type noise filter using a common-mode choke coil, a simple structure is used to suppress deterioration of electromagnetic interference caused by a grounded capacitor. A resistor (54) of a noise filter (50) is arranged between a first input terminal (51a) and a second input terminal (51b) of a common-mode choke coil (51) and a ground line (EC). The resistor (54) is arranged so that current flowing between the first input terminal (51a) and the second input terminal (51b) of the common-mode choke coil (51) and a first output terminal (51x) and a second output terminal (51y) via a first front-stage capacitor (52) or a second front-stage capacitor (53) flows through the resistor (54).

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.

A receiver front end amplifier capable of receiving and processing intraband non-contiguous carrier aggregate (CA) signals using multiple low noise amplifiers (LNAs) is disclosed herein. A cascode having a “common source” configured input FET and a “common gate” configured output FET can be turned on or off using the gate of the output FET. A first switch is provided that allows a connection to be either established or broken between the source terminal of the input FET of each LNA. Further switches used for switching degeneration inductors, gate capacitors, and gate to ground capacitors for each leg can be used to further improve the matching performance of the invention.

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.

This invention provides a single-band / dual-band switchable and dual-band bandwidth adjustable bandstop filter and its application method. The upper part includes a first microstrip transmission line, a second microstrip transmission line, and a first microstrip coupling line connected in sequence. The lower part includes a second microstrip coupling line, a third microstrip coupling line, a first switch, a second switch, and a grounding capacitor. The first, second, and third microstrip coupling lines connect to the first and second ports of the bandstop filter. The first switch connects to one end of the microstrip line in the second and third microstrip coupling lines, and the other end is connected to the grounding capacitor through the second switch. The second switch is connected in series with a bandstop adjustment capacitor. By changing the on / off state of the first and second switches, switching between a narrowband dual-band bandstop filter, an adjustable dual-band bandstop filter, and a wideband bandstop filter is achieved, ensuring more flexible performance in multi-band and complex environments, and effectively reducing the hardware burden of the system.

To provide a technique capable of suppressing radiation noise.SOLUTION: A power conversion device 1 includes: an inverter circuit 40 including a semiconductor switch SW; a DC line 30 including a positive line 30P and a negative line 30N and inputting DC to the invertor circuit 40; a pair of DC reactors 70P and 70N provided in the positive line 30P and the negative line 30N; an inter-line capacitor 80 provided so as to connect each end of an invertor circuit 40 side in each of the DC reactor 70P of the positive line 30P and the DC reactor 70N of the negative line 30N; and a ground capacitor 85 provided so as to connect between an end of the inverter circuit 40 side in the DC reactor 70N of the negative line 30N and a ground GND.SELECTED DRAWING: Figure 1

The invention discloses a light compact XOR-PUF composite circuit based on an NMOS (N-channel Metal Oxide Semiconductor) array. The light compact XOR-PUF composite circuit comprises an XOR-PUF gate level circuit and the NMOS array, the XOR-PUF gate level circuit comprises an exclusive-OR gate XOR1, an exclusive-OR gate XOR2, a first-level phase inverter INV1, a first-level phase inverter INV4, a second-level phase inverter INV2, a second-level phase inverter INV3, a grounding capacitor CAP1, a grounding capacitor CAP2, an AND gate AND1 and an AND gate AND2. According to the invention, the circuit architecture is reconstructed, and the NMOS tube is introduced into the XOR-PUF system, so that the challenge-response pair space is obviously expanded, and the complexity of the security mechanism is improved. Through the improvement, the design breaks through the limitation that a traditional weak PUF is only used for key generation, the advantages of a traditional XOR-PUF and the advantages of a traditional NMOS array are compatible, signal output has high randomness and safety, and the method can be widely applied to diversified safety scenes such as equipment authentication and safety protocols.

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.

The utility model discloses a digital selectable band-pass filter based on a loading type capacitor structure, which belongs to the field of filters, and comprises an input microstrip line, an output microstrip line and a direct current port which are arranged on a substrate and are sequentially connected, a first frequency path and a second frequency path are respectively connected between the input microstrip line and the output microstrip line, the first frequency path comprises a first switch, a loaded capacitor network and a second switch which are connected in sequence; the second frequency path comprises a third switch, a loaded capacitor network and a fourth switch; each of the first switch, the second switch, the third switch and the fourth switch is composed of a plurality of radio frequency switch tubes; the direct current port is connected with the first switch, the second switch, the third switch and the fourth switch respectively; wherein the first switch and the second switch form a first single-pole double-throw switch, the third switch and the fourth switch form a second single-pole double-throw switch, and the loading type capacitor network is composed of a microstrip line and a grounding capacitor and used for filtering input signals. Compared with an interdigital band-pass filter structure, the band-pass filter has the advantages of compact structure, low cost, simple design and the like by introducing the loaded capacitor network.

The present disclosure relates to a capacitor array mismatch correction method, circuit, device, equipment and medium in the field of communication technology. The method includes: performing capacitor array mismatch correction from the highest capacitor of the capacitor array to the low capacitor; judging whether the ratio of the capacitance value of the high capacitor connected to the reference voltage to the parallel value of the remaining grounded capacitors is greater than the design ratio; if it is greater than the design ratio, the high capacitor is suspended and replaced by the next capacitor of the high capacitor connected to the reference voltage, until the ratio of the parallel value of the capacitor connected to the reference voltage to the remaining grounded capacitors is not greater than the design ratio, selecting a suitable capacitor configuration and recording the register setting. The method replaces and configures capacitors on the basis of the existing capacitor array to achieve a pre-designed voltage divider effect, and can achieve good capacitor mismatch correction without adding additional circuits.

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.

The application discloses a slow charging CP wake-up circuit with a hardware self-locking function for an electric vehicle, wherein the source of a MOS tube Q1 is connected with a vehicle storage battery, the drain is connected with a BMS power supply, and the gate is connected with the collector of an NPN triode Q2; the base of the NPN triode Q2 is connected with a slow charging gun CP signal transmitting end, and the emitter is grounded; the emitter of a PNP triode Q3 is connected between a grounding capacitor C2 and a resistor R3, the collector is connected with a closed CP wake-up signal transmitting end, and the base is connected with the collector of an NPN triode Q4; the collector of the NPN triode Q4 is connected with the emitter of the PNP triode Q3, the emitter is grounded, and the base is connected with the collector of the PNP triode Q3. The application controls the conduction state between the storage battery and the BMS power supply through cooperation of the slow charging gun CP signal transmitting end and the MOS tube, the closed CP wake-up signal transmitting end of the BMS outputs a high-level signal to close the CP wake-up, and a self-locking circuit is formed by the PNP triode Q3 and the NPN triode Q4, so that the BMS system power-off function after slow charging is realized.

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 present disclosure discloses a voltage divider regulation circuit and an amplifier circuit for a stacked power amplifier. The stacked power amplifier includes a plurality of stacked transistors, wherein the output of the preceding transistor is connected to the input of the following transistor; the voltage divider regulation circuit includes: a voltage swing detection module connected to the output of each transistor, the voltage swing detection module including a voltage detection unit and a difference unit, for detecting and comparing the voltage swing between the input and output of the transistor, and outputting multiple voltage swings; a swing comparison module connected to the output of the voltage swing detection module, comparing the voltage swings of the two transistors, and outputting a calculation result; the swing comparison module connected to a control module, which outputs a control signal based on the calculation result; an adjustment module connected to the control end of the transistor, for controlling the bias voltage of the control end of the transistor and / or the capacitance value of the grounding capacitor of the control end of the transistor according to the control signal.

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.