64 results about "Grounded capacitor" patented technology

The invention provides a broadband low-noise amplifier based on a three-coil coupling transformer. The broadband low-noise amplifier comprises an input matching network, a common-source differential output driving stage amplifier, an inter-stage matching network, a common-source differential output power stage amplifier and an output matching network which are connected in sequence, broadband matching is realized by using the input matching network and the inter-stage matching network, and the effective transconductance of the transistor is improved; through the cross-coupled capacitors, the LNA gain and stability on a broadband are improved, better isolation is realized, and input and output are decoupled; due to the design of the grounding capacitor, the linearity of the LNA is improved; through the combination of the three-coil coupling transformer and the differential topology, output signals are superposed in the same direction at the output end, and noise is cancelled in the reverse direction at the output end, so that the thermal noise is greatly inhibited, the isolation is improved through the output matching network, the insertion loss is reduced, and the output matching performance is optimized.

The invention provides a power management and power consumption control device and method of a continuous blood glucose detection circuit. Relates to the technical field of continuous blood glucose detection, solves the problems of power consumption control and switching in the prior art, and is characterized in that a power input end of a charge pump is connected with an anode of an external power supply; the control input end of the charge pump is connected with a mode control signal end; the power output end of the charge pump is connected with the first control end of the power switch device; the switching signal control end of the charge pump is connected with the second control end of the power switching device through the delayer; the output end of the power switch device is connected with the working voltage input end, and the working voltage output end is connected with the grounding capacitor; the power output end of the charge pump is connected with the input end of the power-on reset module, the power switch switching signal end of the power-on reset module is connected with the power switch switching signal end of the charge pump, and different working modes can be achieved, so that power consumption control is achieved.

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.

A display device is provided, including a circuit board, a display panel, a plurality of clock signal lines, and a plurality of grounding capacitors. The display panel is connected to the circuit board. Each clock signal line extends from the circuit board to the display panel. The plurality of grounding capacitors are disposed on the circuit board. Each grounding capacitor is connected to a corresponding clock signal line.

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 present invention discloses a bonding and packaging impedance matching device for a superconducting quantum chip and a quantum processor, which relates to the field of superconducting quantum technology and includes a PCB board, bonding wires, and a chip. Pad-to-ground capacitors are provided in both the PCB board and the chip; the transmission line of the PCB board is connected to the transmission line of the chip through the bonding wires, and the bonding wires act as inductors to form a low-pass filter with the two pad-to-ground capacitors to reduce the reflectivity at the bonding wire; the two pad-to-ground capacitors are independently provided, and the capacitance size is adjusted by changing the pad shape; the bonding and packaging impedance matching device and the quantum processor solve the reflection problem at the chip packaging; at the same time, there is no need to introduce external chip capacitors and add additional matching circuits, so the space of the chip and the PCB board is greatly saved.

The invention relates to a filtering combination module which comprises a shielding cover, a common mode inductor group, overline capacitors and four grounding capacitors, an inductor base is arranged in the shielding cover, the common mode inductor group is arranged on the upper surface of the inductor base, the overline capacitors are arranged on the lower surface of the inductor base, and the grounding capacitors are arranged on the upper surface of the inductor base. The four grounding capacitors are arranged on the two sides of the overline capacitor in pairs, a lead of the common mode inductor set is connected with leads of the grounding capacitors and the overline capacitor, and an insulating plate is arranged at the bottom of the shielding cover. The grounding capacitors are arranged on the two sides of the overline capacitor, the common-mode inductor group is arranged on the upper sides of the overline capacitor and the grounding capacitors, through integrated packaging in the vertical direction, the size occupied by overall board arrangement can be reduced, the installation technology requirement is reduced, therefore, the welding procedure is reduced, the technology cost is reduced, and the structure is especially suitable for high-density and small-sized electronic equipment. And the structure is optimized, various safety problems are avoided, and the filtering function is met.

The utility model discloses a high-temperature film grounding capacitor, which relates to the technical field of capacitors and comprises a high-temperature-resistant film grounding capacitor body, two first pins are arranged on the front surface of the high-temperature-resistant film grounding capacitor body, and second pins are welded at the front ends of the first pins. After production, a second pin and a first pin are separated and accommodated in an accommodating mechanism, and the first pin is totally accommodated in an insulating plastic protective frame, so that the whole high-temperature film grounding capacitor is small in size, does not need a relatively large packaging box or packaging bag, and is convenient to use. Meanwhile, the two pins cannot be collided, mail and transportation of manufacturers are facilitated, during use, the second pin and the first pin can be accurately butted firstly and then welded, at the moment, welding is convenient, connection is firm, and subsequent normal use of the high-temperature film grounding capacitor cannot be affected.

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 circuit for Flyback switching power supply includes a transformer having a primary winding, a secondary winding and an auxiliary winding, a power switch coupled to a dotted terminal of the primary winding, and a switch. A first terminal of the switch is connected to a non-dotted terminal of the auxiliary winding through a capacitor, a second terminal of the switch and a dotted terminal of the auxiliary winding are connected, respectively, to a ground. A common node of the capacitor and the auxiliary winding is configured to connect to a non-dotted terminal of the primary winding. A control circuit is configured to generate, based on a voltage at the common node of the capacitor and the auxiliary winding, a control signal to control the switch in order to achieve zero voltage switch (ZVS) of the power switch.

The invention provides a high-pass filter and electronic equipment, and relates to the technical field of filters, the high-pass filter comprises a base body and a plurality of filtering assemblies arranged on the base body; an input electrode, an output electrode and a grounding electrode are arranged on the outer side of the base body; the filtering assembly comprises an inductor, a first capacitor plate, a second capacitor plate, a third capacitor plate and a fourth capacitor plate, at least one filtering capacitor is formed between the first capacitor plate and the second capacitor plate, a grounding capacitor is formed between the third capacitor plate and the fourth capacitor plate, and the fourth capacitor plate is connected with the grounding electrode; and the plurality of inductors, the plurality of filter capacitors and the plurality of grounding capacitors in the plurality of filter assemblies are mutually connected to form a high-pass filter circuit. The layout mode of each capacitor plate in the substrate is simpler and more compact, the preparation difficulty of the high-order high-pass filter is reduced, and the overall size of the high-order high-pass filter can be reduced.

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 utility model discloses a broadband low-noise amplifier, which adopts a GaAs (GaAs) process of a wafer factory in China, adopts a primary cascode structure, realizes matching design of a broadband through negative feedback, simultaneously adds a ground capacitor at a grid electrode of a cascode transistor, adds peaking inductors at drain electrodes of a cascode tube and the cascode tube, and realizes matching design of the broadband through negative feedback. The high-frequency gain is improved, the bandwidth is expanded, and the noise is improved.

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.

The present invention provides a motor control device and an insulation resistance detection method thereof. The motor control device includes: a second switch capable of grounding a negative busbar; a third switch having one end connected to a second power supply connected to the busbar and the other end capable of being grounded; a current detection unit for detecting the current value between a motor winding and the negative busbar; and an insulation resistance calculation unit for calculating the insulation resistance value of the motor based on the current values detected by the current detection unit when the third switch is opened and when the third switch is closed, respectively, in a state where the power supply is disconnected by the first switch unit and the charge of the grounding capacitor is discharged by turning on the second switch for a predetermined time, as well as the voltage values of the capacitor and the voltage values of the second power supply unit.

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.