270 results about "Capacitive effect" patented technology

In one aspect, the present invention relates to a pressure sensing / force generating device comprising a non-planar substrate, a printed pressure sensitive element comprising (a) a piezoelectric material containing ink composition capable of producing a piezoelectric effect / piezoresistive effect and / or (b) a dielectric material containing ink composition capable of producing a capacitive effect. It also includes a first printed electrode comprising a conductive ink composition, and a second printed electrode comprising a conductive ink composition. The first and second electrodes are in electrical contact with the printed pressure sensitive element. The first and second printed electrodes and the printed pressure sensitive element collectively form a pressure sensitive junction, which is coupled to the non-planar substrate. The present invention further relates to medical devices comprising the pressure sensing / force generating device and methods of making such devices.

A pen or stylus for use with a finger activated computer touchpad uses capacitively coupled voltage signals to simulate the capacitive effect of a finger on the touchpad. In addition, the pen has buttons that can be utilized to capacitively couple control signals to the touchpad that are interpreted by application software as specific user-defined inputs. The pen has a conductive tip that is placed into contact with the touchpad. By biasing the touchpad electrodes with a properly timed voltage signal, the pen alters the charging time of the electrodes in the touchpad. This alteration in charging time is interpreted by the touchpad as a change in capacitance due to the presence of a user's finger. Thus, the pen can be used with touchpads that were designed to only detect finger movements.

Exemplary techniques for tuning the effective capacitance provided by an embedded capacitor are disclosed. The techniques may be realized by modifying one or more conductive features of one or more vias connected to the embedded capacitor to adjust the capacitance contributed by the one or more vias. One technique preferably includes altering the conductive surface area of a pad of one or more vias to which the embedded capacitor is electrically connected to increase or decrease the contributed capacitance. Another technique provides for bore drilling or tap drilling one or more vias connected to the embedded capacitor to increase the surface area of plated interior surfaces of the vias, thereby increasing their capacitive effect. An additional technique includes forming a number of vias having various capacitive effects and electrically connecting the embedded capacitor to one or more of these vias to increase the capacitance.

Integrated high frequency balanced-to-unbalanced transformers suitable for operation in high frequencies, such as radio frequencies. Embodiments disclosed give consideration to issues related to the layout of the primary and secondary inductors for the minimization of capacitive effects between layers while using a minimal number of metal layers. Two solutions are provided, one having embodiments with a symmetrical primary inductor in a 4-metal layer implementation and one having embodiments with a non-symmetrical primary inductor in a 3-metal layer implementation.

A dressing for promoting healing and pain relief of the body of a living organism having a pathologic condition has at least one layer of conductive material having a resistance no greater than 1000 Ω / cm2. When placed proximate a portion of the body of the living organism suffering from the pathologic condition, the dressing alters the electrodynamic processes occurring in conjunction with said pathologic condition to promote healing and pain relief in the living organism. When used as a wound dressing, the conductive material is placed in contact with tissue around the periphery of the wound and with the wound, lowering the electrical potential and resistance of the wound and increasing the wound current. In an exemplary embodiment, the conductive material is a multi-ply nylon fabric plated with silver by an autocatalytic electroless plating process and with the plies in electrical continuity. The dressing provides an antimicrobial and analgesic effect. The dressing may be provided for numerous applications and may include other layers such as an absorbent layer, a semi-permeable layer and additional layer of conductor material. Multilaminate embodiments of the present invention exhibit conductive material concentration gradients and, potentially, a capacitive effect when sequential conductor layers are insulated by intervening layers.

A protective arrangement for preventing parts of the body from being trapped between at least two mutually relatively moveable parts including at least one strip which is associated with at least one part. There are provided in the strip at least two mutually spaced conductive elements extending in the longitudinal direction of the strip. An electronic sensor system serves to produce an output signal for a capacitance that is adapted to vary as a result of external influences. Due to the fact that at least one first conductive element sends out a signal which is received by at least one second conductive element due to the capacitive effect of the first conductive element and that the second conductive element is at substantially the same electrical potential as the first conductive element and likewise sends out the received signal, there is provided a capacitive crush protection arrangement which does not react to splashes of water or the formation of dew or frost.

A gate isolation structure of a semiconductor device and method of making the same provides a trench in a silicon substrate, wherein a dielectric layer is formed on sidewalls and bottom of the trench, the dielectric layer having a first thickness on the sidewalls and a second thickness at the bottom that is greater than the first thickness. The thicker dielectric layer at the bottom substantially reduces gate charge to reduce the Miller Capacitance effect, thereby increasing the efficiency of the semiconductor device and prolonging its life.

A dressing for promoting healing and pain relief of the body of a living organism having a pathologic condition has at least one layer of conductive material having a resistance no greater than 1000 Ω / cm2. When placed proximate a portion of the body of the living organism suffering from the pathologic condition, the dressing alters the electrodynamic processes occurring in conjunction with said pathologic condition to promote healing and pain relief in the living organism. When used as a wound dressing, the conductive material is placed in contact with tissue around the periphery of the wound and with the wound, lowering the electrical potential and resistance of the wound and increasing the wound current. In an exemplary embodiment, the conductive material is a multi-ply nylon fabric plated with silver by an autocatalytic electroless plating process and with the plies in electrical continuity. The dressing provides an antimicrobial and analgesic effect. The dressing may be provided for numerous applications and may include other layers such as an absorbent layer, a semi-permeable layer and additional layer of conductor material. Multilaminate embodiments of the present invention exhibit conductive material concentration gradients and, potentially, a capacitive effect when sequential conductor layers are insulated by intervening layers.

A miniature multi-frequency antenna, comprising at least one dielectric substrate, at least one signal electrode and at least one ground electrode. The signal electrode and the ground electrode are disposed on a substrate. The signal electrode contains at least two branches and at least one branch is partially overlapped with the ground electrode. Each interlayer region between the partially overlapped electrodes forms a specific capacitance. By utilizing this interlayer capacitive effect, the resonant frequency of lower frequency band is achieved while the size of the antenna is effectively reduced. For obtaining the resonant frequency of the high frequency bands, the design concept of PIFA is applied on other branches of the signal electrode. A miniature antenna thus obtained is capable of transmitting / receiving multi-frequency signals having the benefits of easily adjusting impedance and resonant frequency.

The present invention disclosed a method for measuring electric conductivity of water. It is characterized by that said method includes the following steps: adopting a conductance tank with two electrodes; respectively applying sine signals whose frequencies are omega a and omega b, in which omega b=2 omega a; respectively measuring modulus of Za and Zb of impedance under the condition of two frequencies; and utilizing a formula to determine its conductivity value g. Said invention also provides said formula.

The invention discloses a fault location method based on a travelling wave when the signal / noise ratio is at a lower level. Because of the strengthening of capacitance effects of a high-voltage powertransmission line, the travelling wave decays comparatively large when is transmitted along the line, in particular when high resistance fault or low voltage inception angle ground fault occurs, the initial energy of the travelling wave is very low, and the energy is comparatively low after line capacitance decaying, and is mainly overwhelmed by noise. Therefore, as far as the present used travelling wave method is concerned, if a sampled signal is not preprocessed, wavelets transformation is directly used for carrying out fault location, but correct result can't be obtained. In the fault location method, a moving average filter is firstly used to preprocess the sampled signal, and then Bspline wavelet transformation is used to realize fault location. Because the moving average filter can effectively restrain the noise without decaying an abrupt signal, based on this, fault location at a low signal / noise ratio can be realized by utilizing the Bspline wavelet transformation.

A capacitor and capacitor-like device or any other device showing capacitive effects, including FETs, transmission lines, piezoelectric and ferroelectric devices, etc., with at least two electrodes, of which at least one electrode consists of or comprises a material or is generated as electron system, whose absolute value of the electronic charging energy as defined by the charging-induced change of Ekin+Eexc+Ecorr exceeds 10% of the charging-induced change of the Coulomb field energy of the capacitor according to E=Ecoul+Ekin+Eexc+Ecorr. Therein, E is the energy of a capacitor and Ecoul=Q2 / 2 Ccoul=Q2d / (2ε0 εx A), A is the area of the capacitor electrodes, d is the distance and ε0εx the dielectric constant between them. Ecorr describes the correlation energy, Ekin the electronic kinetic energy and Eexc the exchange energy of the electrode material. Particularly in miniaturized devices, Ecoul is becoming so small that, by using certain materials or material combinations for the capacitor, Ekin, Eexc, and / or Ecorr provide significant contributions to E. Preferred are materials with strongly correlated electron systems such as perovskites like La1-xSrxTiO3, YBa2Cu3O7-d, vanadates such as (V1-xAx)2O3 with A=Cr, Ti, materials with free electron gases of typically low densities such as Cs, Bi or Rb, or of materials the carrier density of which is reduced by diluting these materials in other materials with smaller carrier densities, metals like Fe, or Ni, materials with van-Hove singularities in the electronic density of states such as graphite or Bechgaard salts or even or 2D-electron gases generated by graphene or by heterostructures, such as the electron gases generated at LaAlO3 / SrTiO3 or ZnO / (MgxZn1-x)O multilayers and more.

A door release system including a capacitive circuit that includes a touch bar, a microprocessor within the touch bar programmed with noise-discrimination software to sense touching of the bar, and at least one micro-switch within the bar to function as a back-up that picks up movement of the bar to release the latch should the capacitive circuit fail. Optionally, a sign illuminated by LEDs and an antimicrobial coating / treatment may be applied to the bar. The system is intended for use on magnetically locked doors. The addition of the micro-switches that are actuatable by continued movement on the touch bar after the bar is initially touched provides a redundant access function initiated by other than the capacitive effect of human touch, which is expected to simplify use and ease accessibility for personnel with prosthetics or who may otherwise have their hands occupied.

The invention relates to a base station antenna and a dual polarized antenna oscillator thereof. The dual polarized antenna oscillator comprises a radiation piece and a loading branch, wherein the surface of the radiation piece is provided with a hollow part. The dual polarized antenna oscillator has the beneficial effects that: when a feeding network is adopted to feed the radiation piece, a capacitance effect is formed between a tail end of the loading branch and the feeding network, and the capacitance effect is focused on a low frequency end of an operating frequency band; in addition, a capacitance parameter is connected in parallel with an input impedance parameter of the radiation piece, thus the operating frequency band expands towards the lower frequency band; moreover, the hollowpart is beneficial to bandwidth expansion towards a high frequency band, in this way, under the function of the loading branch and the hollow part, the dual polarized antenna oscillator can achieve wide frequency band coverage with one layer of radiation piece, thus the dual polarized antenna oscillator is simple in structure and low in section, and therefore, when the dual polarized antenna oscillator is applied to the base station antenna, miniaturization of the base station antenna can be facilitated.

A semiconductor memory device having a multiport memory includes a plurality of memory cells MC arranged in columns and rows, a plurality of first word lines WLA0-WLAn connected to a first port 13a, and a plurality of second word lines WLB0-WLBn connected to a second port 13b. Each of a plurality of first word lines WLA0-WLAn and each of a plurality of second word lines WLB0-WLBn are arranged alternately in a planar layout. A semiconductor memory device is thus obtained that allows a coupling noise between interconnections to be reduced without an increase in memory cell area.

A humidity sensor is provided having humidity levels approaching 100% relative humidity can be measured, as well as condensation measurements which appear as RH values “above 100%”. The humidity sensor is a capacitance based sensor. The capacitor(s) of the sensor is dimensioned so that substantial electric fields of the capacitor extend to the sensor / ambient air interface so that the conditions at the ambient side of the interface provide data for the sensor. In particular, the capacitance effects of moisture formation on the ambient side of the sensor / ambient air interface are utilized as part of the measurements so that relative humidity levels below and above 100% can be detected. The capacitor(s) of the sensor is dimensioned so that substantial electric fields of the capacitor extend to the air interface so that the conditions at ambient side of the interface provide data for the sensor.

The invention provides an H-bridge driving circuit. The circuit is characterized by comprising the following steps that: a photoelectric isolating circuit converts a received first pulse width modulation (PWM) signal into a second PWM signal and transmits the second PWM signal to a dead zone control logic module; the dead zone control logic module sets dead zone information according to the second PWM signal, and generates an upper bridge arm control signal and a lower bridge arm control signal according to the dead zone information and the second PWM signal, and the dead zone control logic module transmits the upper bridge arm control signal to an upper bridge arm front driving circuit and transmits the lower bridge arm control signal to a lower bridge arm front driving circuit; and the upper bridge arm front driving circuit and the lower bridge arm front driving circuit control the operation state alternation of a load driving circuit according to the upper bridge arm control signal and the lower bridge arm control signal respectively. The circuit can avoid the capacity effect in the voltage change process of an H-bridge circuit load unit and the output frequency of the H-bridge driving circuit can be increased.

The invention discloses a multimode broadband antenna module and a wireless terminal, which belong to the field of wireless communication. The multimode broadband antenna module not only has a large-range work broadband, but also has quite a small size. The multimode broadband antenna module comprises a printing circuit board and an antenna body. The antenna body comprises a first radiation body and a second radiation body, which are electrically connected to the printing circuit board. The first radiation body comprises a connecting part, a low-frequency part and a high-frequency part. The second radiation body comprises a grounding part, a low-frequency part and a high-frequency part. A first preset distance is disposed between the low-frequency part of the first radiation body and the low-frequency part of the second radiation body. A second preset distance is disposed between the high-frequency part of the first radiation body and the high-frequency part of the second radiation body. Accordingly, a coupling capacitance effect can be formed between the first radiation body and the second radiation body.

The invention discloses a composite accelerometer based on a capacitance effect and a tunnel effect. The composite accelerometer comprises a bonding substrate, a cushion liner frame body, a supporting frame body, a cantilever beam and a mass block. A tunnel point is arranged at the center of the lower surface of the mass block. The composite accelerometer based on the capacitance effect and the tunnel effect has the advantages of adopting the manner of integrating capacitance detection and tunnel effect detection and detecting a capacitor and a tunnel. Detection of a low detection threshold value, a wide range and high sensitivity of an acceleration speed is achieved. Meanwhile, accurate measurement of the acceleration speed of a known acceleration speed value circumstance is carried out. The integrated design is adopted and the composite accelerometer is reasonable in structure, high in sensitivity, simple in detection circuit, convenient to use, good in reliability and suitable for microminiaturization.

The invention discloses a double-anti-fake fingerprint collecting device based on capacitance effect and pulse detection, which comprises a fingerprint collecting head and a control unit, and is characterized in that the fingerprint collecting head consists of a sensor for collecting information, a light source for producing and transmitting laser and a prism for reflecting the laser transmitted from the light source, wherein the sensor comprises a fingerprint collecting sensor (4), a pulse sensor (5) and a capacitor-type human body contact sensor (6); the light source comprises a fingerprint collecting light source (2) and a pulse detection light source (3); and the control unit consists of a microcontroller, a fingerprint collecting unit, a pulse detection unit and a contact detection unit. The capacitor-type human body contact detection is combined with the pulse detection, simulation products such as fingerprint sleeves or fingerprint films are not worn by a card puncher can be judged through the combination of the capacitor-type human body contact detection with the pulse detection, and the collection of the fingerprint can be successfully completed; the behavior for punching a time card for others can be effectively prevented, and the management work of enterprises and institutions can be favored; and the behavior for punching the time card for others can be effectively prevented, and the information and property security of users adopting the fingerprint as a password can be guaranteed.

A system and related method are provided to calibrate for wire capacitance during use to minimize error in conductivity measurement of the target fluid. The system includes a signal generator configured to drive the conductivity cell and the temperature element, with an alternative current (AC) drive signal having variable parameter. The system further includes a processor assembly electrically coupled to the conductivity cell and the temperature element to calculate a conductivity value of the fluid. The conductivity value is a function of the values of the temperature measurement, the compensation measurement, and the raw conductivity measurement, thereby compensating the conductivity value for capacitance effects. In this manner, the system effectively compensates for capacitance attributable to wiring extending between the electrode and other electronics of the sensor, usable with wiring of varied and unknown lengths.

A portable information handling system multi-purposes a near field communication (NFC) antenna to detect object proximity of objects by interfacing a capacitive proximity processor with the NFC antenna and isolating the capacitive effects at the NFC antenna with a capacitive matching circuit disposed between the NFC antenna and an NFC transceiver. Comparison of the objects detected proximate the NFC antenna and proximate a conductive antenna provides a distinction of different types of objects, such as human forms versus a desktop.

The invention discloses a two-dimensional semiconductor negative capacitance field-effect transistor and a preparation method thereof. The device structure sequentially comprises a substrate, a two-dimensional semiconductor, a metal source-drain electrode, a ferroelectric gate medium with a negative capacitance effect and a metal gate electrode from bottom to top. The preparation method comprises the steps of firstly, preparing the transition metal chalcogenide two-dimensional conductor on a substrate; secondly, preparing the metal source-drain electrode by employing an electron beam lithography technology and combining a stripping process; thirdly, preparing a ferroelectric thin film with the negative capacitance effect on the structure; and finally, preparing the metal gate electrode on the thin film to form ferroelectric-controlled two-dimensional semiconductor negative capacitance field-effect transistor. Different from other two-dimensional semiconductor negative capacitance field-effect device structures, the metal-ferroelectric-semiconductor structure has the advantages that a high-performance negative capacitance field-effect device can be achieved; and an electrical test result shows that the subthreshold swing of the device is far smaller than 60mV / dec, the Boltzmann limit is broken through, and the two-dimensional semiconductor negative capacitance field-effect device simultaneously has the characteristics of extremely low power consumption, high-speed turnover and the like.

The invention relates to a liquid crystal display device and a manufacture method thereof. The liquid crystal display device comprises a first basic board, a second basic board as well as a data signal line and a grid scanning line which are arranged on the second basic board; wherein, the first basic board is provided with a plurality of strip optical spacers. The liquid crystal display device can reduce the capacitance effect generated by the liquid crystal on the data signal line, improves the writing capacity of the signal data line, and can reduce the line width of the data signal line and improves the aperture opening ratio.