10 results about "Fixed capacitor" patented technology

Fixed capacitor (10) for an electronic device of a motor vehicle, in particular a power converter (12) for the electric drive of the motor vehicle, with a case (24), a first electrode (16) provided inside the housing (24), a second electrode (18) separated from the first electrode (16) by an intermediate space (20) and cooperating with the first electrode (16) to generate an electric field inside the housing (24) and a dielectric provided in the space (20), the housing (24) has an inlet (32) communicating with the space (20) and an outlet (34) communicating with the space (20), and the dielectric is a coolant (28) of the motor vehicle, wherein at least one electrically non-conductive spacer is arranged in the space (20) to define a distance between the first electrode (16) and the second electrode (18), wherein within the space (20) a flow path for the coolant (28) leading from the inlet (32) to the outlet (34) is kept clear and in the space (20) an electrically non-conductive porous body (22) is provided to form the spacer, wherein the porous body (22) has a sponge-like structure.

In one embodiment, an RF impedance matching circuit is disclosed. The matching circuit includes at least one electronically variable capacitor (EVC). Each EVC includes fixed capacitors, each of the fixed capacitors having a corresponding switching circuit for switching in and out the fixed capacitor to alter a total capacitance of the EVC. Each switching circuit includes a switch operably coupled to the fixed capacitor to cause the switching in and out of the fixed capacitor. The switch includes at least one string of series-connected PIN or NIP diodes. For each string, at least one of the diodes of the string has a balancing capacitor parallel to the diode.

This invention provides a chip-type electrolytic capacitor that forms a sufficient resin layer between the capacitor body and the base plate. [Solution] A chip-type electrolytic capacitor comprising a bottomed cylindrical outer case in which a capacitor element is housed, a sealing body that seals the opening thereof, a capacitor body having lead terminals connected to the capacitor element and penetrating the sealing body, and a seat plate 3 positioned opposite the sealing body to hold the capacitor body, wherein the seat plate has a seat plate body portion 31 and a seat plate peripheral wall portion 32 formed around it, a pair of insertion holes 33 through which lead terminals are inserted are formed in the seat plate body portion, a plurality of radial grooves 341 extending radially from the center of the inner bottom surface toward the seat plate peripheral wall portion are formed on the inner bottom surface 34 of the seat plate body portion opposite the sealing body, resin is filled between the seat plate and the capacitor body, and the resin filled in each of the plurality of radial grooves can flow through the center of the inner bottom surface, thereby filling the space between the seat plate and the capacitor body with resin more uniformly.

The present invention provides a process chamber comprising: a chamber body having radio frequency electrodes disposed therein; a spray plate for supplying process gas to the chamber body; a fixed capacitor having a first end connected to the spray plate and a second end connected to the chamber body; and a plurality of grounding members arranged at circumferential intervals along the spray plate, wherein the first end of the plurality of grounding members is connected to the spray plate and the second end is grounded, so that the spray plate is uniformly grounded through the plurality of grounding members.

An antenna having a tuning circuit architecture and methods for using the same are described. In some embodiments, an antenna includes a metasurface having a plurality of radio-frequency (RF) radiating antenna elements. Each of the plurality of antenna elements includes a tuning circuit including a voltage-variable capacitor, a first fixed capacitor coupled in series with the voltage-variable capacitor, and a second fixed capacitor coupled in parallel with the voltage-variable capacitor.

An antenna having a tuning circuit architecture and methods for using the same are described. In some embodiments, an antenna includes a metasurface having a plurality of radio-frequency (RF) radiating antenna elements. Each of the plurality of antenna elements includes a tuning circuit including a voltage-variable capacitor, a first fixed capacitor coupled in series with the voltage-variable capacitor, and a second fixed capacitor coupled in parallel with the voltage-variable capacitor.

The invention discloses a 3T1C gas response internal characteristic controllable extraction structure, which belongs to the technical field of gas sensors, and specifically comprises an N-type gas sensitive field effect transistor, a P-type gas sensitive field effect transistor, an output modulation field effect transistor and a fixed capacitor, the N-type gas-sensitive field effect transistor is connected with the source electrode of the P-type gas-sensitive field effect transistor, and is connected to a signal output end through the fixed capacitor; the drain electrode of the N-type gas sensitive field effect transistor is connected with a driving voltage; the grid electrode of the output modulation field effect transistor is connected with modulation voltage, one of the source electrode and the drain electrode is connected with a signal output end, and the other one and the drain electrode of the P-type gas sensitive field effect transistor are jointly connected with a common ground end. Conversion and amplification of target gas concentration response are realized by utilizing the influence effect of target gas on channel resistance of different types of gas sensitive field-effect tubes, and ultrafast extraction and controllable modulation of gas concentration characteristics are realized by outputting a time constant of a modulation field-effect tube control differentiating circuit. The system has the advantages of easy integration, low power consumption and ultrafast response.

A method for manufacturing a potted capacitor, the potted capacitor comprising a plastic encapsulation shell, a capacitor body, and potting compound, wherein the capacitor body is disposed within the plastic encapsulation shell, and the potting compound is filled within the plastic encapsulation shell to fix the capacitor body, the capacitor body comprising a first frame, a second frame, and a plurality of capacitor chips; the first frame comprising a first frame body, two first extension plates disposed opposite to each other on the first frame body, and two first pin terminals spaced apart on the first frame body; the second frame comprising a second frame body disposed opposite to the first frame body, two second extension plates disposed opposite to each other on the second frame body, and two second pin terminals respectively disposed on the two second extension plates; the plurality of capacitor chips are sequentially arranged between the first frame and the second frame; by defining the structural composition of the first frame and the second frame, the two first extension plates or the two second extension plates can form a heat dissipation space, thereby improving the reliability and stability of the potted capacitor.

The application provides a T-type impedance matching network and a control method thereof, which are used for a low impedance load of an inductively coupled plasma device, and the impedance characteristics of the load under 13.56 MHz are resistance 0.1 Ω-2 Ω and inductive reactance 100 Ω-200 Ω. The network comprises a fixed capacitor, a first adjustable capacitor and a second adjustable capacitor; the slope of the control output impedance real part with the change is controlled, the real part change range is dominated, and the imaginary part is independently adjusted. The control method comprises the following steps: selecting the capacitance value according to the real part range, adjusting the matching real part, adjusting the matching imaginary part and not affecting the real part. The application realizes the fast and stable matching of the extremely low impedance load, the real part and the imaginary part are decoupled and controlled, and the matching range is wide.