64results about How to "Shorten the current path" patented technology

In a semiconductor device, the conventional monolithic dual MOSFET has a structure in which two MOSFET chips sharing a common drain region are arranged side by side, so the resistance value of the drain region is high, and the reduction of the on-resistance of the device is limited. In the semiconductor device of the present invention, the first MOS transistors connected to the first source electrode and the second MOS transistors connected to the second source electrode are alternately arranged adjacent to each other on one chip. Different potentials are respectively applied to the first source electrode and the second source electrode, and the switching control of the two MOS transistors is performed through one gate terminal. On-resistance can be reduced because current flows around the trench.

An electrical contact for connecting a chip module to a print circuit board, the electrical contact comprises a main body, an upper elastic arm and a lower mounting arm extending upwardly from the main body, and a lower elastic arm and a lower mounting arm extending downwardly from the main body. The upper mounting arm is disposed at the downside of the upper elastic arm and forms a space therebetween; the lower mounting arm is disposed at the downside of the lower elastic arm and forms a space therebetween. The upper elastic arm and the lower elastic arm are respectively deformed by the chip module and print circuit board to resist to the upper mounting arm and lower mounting arm, thereby shortening the current path between the chip module and the print circuit board for improving the high frequency performance of an electrical connector.

The invention relates to a miniaturization method of an antenna. The antenna comprises a radiating body. The miniaturization method of the antenna comprises the following steps: decreasing the size of the radiating body of the antenna to shorten a current path of the antenna; setting up a through hole on the radiating body to increase the current path of the antenna, wherein the shortened size for the current path of the antenna is same as the increased size for the current path of the antenna; and forming an miniaturized antenna. By using the miniaturization method of the antenna, the volume of the antenna can be reduced under the condition of keeping the current path of the antenna unchanged, thus the miniaturized antenna can keep frequency unchanged. The invention also relates to an antenna with smaller volume.

The present disclosure provides an assembly structure for providing power for a chip and an electronic device using the same. The assembly structure includes: a circuit board, configured to provide a first electrical energy; a chip; a power converting module, configured to electrically connect the circuit board and the chip, convert the first electrical energy to a second electrical energy, and supply the second electrical energy to the chip, wherein the chip, the circuit board and the power converting module are stacked; and a connection component, configured to electrically connect the circuit board and the power converting module. The present disclosure assembles a power converting module with a circuit board and a chip in a stacking manner, which may shorten a current path between the power converting module and the chip, reduce current transmission losses, improve efficiency of a system, reduce space occupancy and save system resource.

The invention discloses an electrical connector, which is used for being mounted on a circuit board to electrically connect a chip module. The electrical connector comprises an insulating body with a plurality of terminal holes and a plurality of correspondingly accommodated in the The conductive terminal in the terminal hole, the insulating body has opposite upper and lower surfaces, the terminal hole penetrates the upper and lower surfaces, and the conductive terminal includes a docking arm for contacting the chip module and a soldering arm for soldering to the circuit board and extending up and down, the butt arm includes a first main body portion fixed in the terminal hole and the first main body portion is bent upwardly and extends out of the The elastic arm on the upper surface, the docking arm and the welding arm are independent and spaced apart from each other, the elastic arm moves when the chip module is pressed down and presses the welding arm downward to form electrical conduction, thereby shortening the The current path between the chip module and the circuit board improves the high-frequency performance of the electrical connector.

The invention discloses an electromagnetic compatibility device for a spark light source of a photoelectric direct-reading spectrometer.The electromagnetic compatibility device comprises a low voltage controlling module, a high voltage generating module, a power module and a voltage isolating module; both the low voltage controlling module and the power module are arranged in a spark light source box; both the high voltage generating module and the voltage isolating module are arranged in a Faraday cage; the Faraday cage is integrated with an exciting platform; a connecting wire for the low voltage controlling module and the high pressure generating module between the Faraday cage and the spark light source box and a connecting wire for the voltage isolating module and the power module are arranged in a shielding mechanism; the exciting platform is connected with the power module through a return cable; the spark light source box and the return cable are grounded; the power module, the low voltage controlling module, the high voltage generating module and the exciting platform are connected with a reference ground in a power supply. According to the electromagnetic compatibility device for a spark light source of a photoelectric direct-reading spectrometer, a current path of a high voltage loop is reduced and electromagnetic interference amplitude is reduced, thereby foundationally solving electromagnetic interference.

The invention discloses a double-edge lead correction strengthening comparator and an active full-bridge rectifier of the double-edge lead correction strengthening comparator. A pre-amplifier of the double-edge lead correction strengthening comparator comprises a bias current circuit and a common gate amplifying circuit; the bias current circuit is used for providing current polarization for the common gate amplifying circuit; the common gate amplifying circuit is used for amplifying an input voltage and generating quasi digital output; an imbalance generation circuit is used for generating different imbalance voltages in an imbalance current mode, and lead comparison is carried out on a rising edge and a falling edge of the comparator; a double-edge digital latch is used for latching output results of the comparator; a driving stage is used for amplifying output signals of the double-edge digital latch; a feedback control circuit is used for reducing a direct current bias current to improve the efficiency of the rectifier. By means of the double-edge lead correction strengthening comparator and the active full-bridge rectifier, the stability of the double-edge correction comparator is achieved through the double-edge digital latch and feedback control method, quiescent dissipation of the double-edge correction comparator is optimized, and the aim of improving the efficiency of the active rectifier is achieved.

The present invention relates to a cross-band frequency-conversion antenna based on an intelligent paper folding structure, belonging to the field of frequency reconfigurable antennas. The antenna comprises a substrate, an antenna arms, a coaxial feeder, a radio frequency coaxial connector and a RF signal emitter; the substrate employs a self-locking square-twist folding structure; the middle portion of the substrate is provided with a cross-line hole, the two antenna arms are symmetrically glued and fixed at the upper side plate surface of the substrate, the initiating terminal of each antenna arm is extended outwards from the cross-line hole, each antenna arm is located the panel overlapping position for ducking in a folding state; the initiating terminals of the antenna arms are respectively connected with two output ports of the RF signal emitter through the coaxial feeder via the radio frequency coaxial connector, and output signal phase difference of two ends of the RF signal emitter is 180 degrees. The antenna can be subjected to self unfolding through heating to change working frequency, the influence of frequency modulation on performances of the antenna is little, the frequency tuning amplitude is large, and cross of different wave bands can be achieved.

The invention provides a portable electronic device, comprising a demountable first shell, an antenna and a first coupling element, wherein the antenna is arranged in the demountable first shell; the first coupling element is arranged on the inner wall of the demountable first shell; and the first coupling element is separated from the antenna and overlapped with a part of the antenna on a vertically projective plane.