Abstract: An electric circuit for driving a current through a load resistance in a first state and isolating the load resistance in a second state includes: a first switch configured to connect a first terminal of the load resistance and a first port of the electric circuit, the first switch having a first electric potential; a second switch configured to connect a second terminal of the load resistance and a second port of the electric circuit, the second switch having a second electric potential, different from the first electric potential; and at least one auxiliary resistance included within a bypass line configured to bypass the load resistance and the second switch. The first switch is configured to switch a current flowing through the first switch, and the second switch is configured to switch a current flowing through the second switch.

Abstract: A detection device includes an electrostatic capacitance sensor including an electrode pair and being configured to detect electrostatic capacitance of a medium brought into contact with the electrode pair, and a first ultrasonic wave sensor including a first transmission unit configured to transmit an ultrasonic wave and a first reception unit configured to receive an ultrasonic wave transmitted from the first transmission unit. The transmission unit and the reception unit are positioned to sandwich the medium.

Abstract: According to one example of the disclosure, a device comprises an antenna, a capacitor including a first plate having a first voltage, and the antenna having a second voltage, and sensing circuitry coupled to the first plate and configured to apply the first voltage to the first plate, determine a capacitance between the first plate and the antenna, and identify, based on the capacitance, a capacitive touch input.

Abstract: A circuit for performing a display driving function and a fingerprint and touch detecting function includes a unity gain buffer amplifier, an operational amplifier integrator, an ADC circuit, and a digital processing circuit coupled to the ADC circuit. An input terminal of the operational amplifier integrator is coupled to a touch sensor. When the circuit is operated under a display driving mode, an input terminal of the unity gain buffer amplifier receives a gray level voltage and an output terminal of the unity gain buffer amplifier is coupled to a display panel. When the circuit is operated under a fingerprint detecting mode, the input terminal and the output terminal of the unity gain buffer amplifier are respectively coupled to a fingerprint sensor and the ADC circuit. When the circuit is operated under a touch detecting mode, an output terminal of the operational amplifier integrator is coupled to the ADC circuit.

Abstract: A detecting device includes a plurality of first electrodes extending in a first direction and a plurality of second electrodes extending in a second direction intersecting the first direction, the first electrodes and the second electrodes being disposed facing each other with an insulating layer interposed therebetween, a first electrode selection circuit configured to supply a drive signal to the first electrodes, and a detection circuit configured to detect capacitance generated between the first electrodes and the second electrodes due to the drive signal.

Abstract: Provided is a pixel circuit. The pixel circuit includes a conversion element forming a voltage of an input level at a first node, a first transistor adjusting the voltage of the first node to a first level in response to a first signal received at a first time interval, a first capacitive element forming a voltage at a second node based on the voltage of the first node, a second transistor adjusting a level of the voltage of the second node to a second level in response to the first signal, a third transistor forming a voltage at a third node, a fourth transistor outputting a current in response to a second signal received in a second time interval, and a. fifth transistor adjusting the voltage of the third node to a third level in response to a third signal received in a third time interval.

Abstract: A method and apparatus of global coarse baseline correction (GCBC) for capacitive scanning. An input device may include a number (N) of sensor electrodes, a GCBC circuit, and detection circuitry. Each sensor electrode is associated with a respective channel. The GCBC circuit produces sensing signals in each of the N channels and the detection circuitry may detect changes in the capacitances of one or more sensor electrodes based on the sensing signals. In some implementations, the GCBC circuit may include a current source which outputs a first current, a transimpedance amplifier (TIA) which converts the first current to a sensing voltage, and a number (N) of resistors that can be coupled between the output of the TIA and the N sensor electrodes, respectively. The coupling of each resistor between the TIA and a respective sensor electrode produces a sensing signal in the channel associated with the sensor electrode.

Abstract: A method for validating a capacitance measurement device including, sending a first drive signal from a capacitance measurement device to a capacitor emulator, modifying the first drive signal by an four quadrant analog multiplier, directing the modified signal across a capacitor to produce a return signal, sending the return signal to the capacitance measurement device to validate the capacitor, and validating the return signal against an expected return signal by the capacitance measurement device.

Abstract: A touch display module includes a display panel and a touch sensing layer. The touch sensing layer is embedded in the display panel and includes a plurality of sensing electrode groups. The sensing electrode groups are sequentially arranged along a first axial direction. One of the sensing electrode groups includes a first electrode block, a second electrode block, and a third electrode block spaced apart from each other. The first electrode block is located at a same side of the second electrode block and the third electrode block in the first axial direction and is located between the second electrode block and the third electrode block in a second axial direction perpendicular to the first axial direction.

Abstract: A sensor device has: a sensor unit that outputs a sinusoidal detection signal having an amplitude matching a physical quantity to be detected; a reference signal creator that creates a first sinusoidal reference signal having the same frequency and phase as the detection signal; and a demodulator that multiplies the detection signal by the first reference signal and creates, as a first demodulation signal matching the physical quantity, a signal matching a direct-current component included in a signal resulting from the multiplication. The reference signal creator creates a sinusoidal second reference signal having the same frequency as the detection signal but being out of phase with the detection signal. The demodulator multiplies the detection signal by the second reference signal and creates, as a second demodulation signal matching a noise component superimposed on the detection signal, a signal matching a direct-current component included in a signal resulting from the multiplication.

Abstract: A touch sensitive processing method, comprising: generating modified codes of N orthogonal pseudo random number (PN) codes, each of PN code has M symbols, where M and N are positive integers larger than 1; transmitting driving signals modulated by the N modified codes via N first electrodes, respectively, and sensing via multiple second electrodes in a M symbols period to generate M one-dimensional sensing information arrays; calculating sums of corresponding elements of the M one-dimensional sensing information arrays corresponding to each of the second electrodes, respectively; determining whether each of the sums is in a range; and recording the M one-dimensional sensing information arrays and their corresponding N first electrodes and N PN codes in response to that at least one of the sums is determined out of the range.

Abstract: The present disclosure relates to integrated circuits, and more particularly, to an anti-tamper x-ray blocking package for secure integrated circuits and methods of manufacture and operation. In particular, the present disclosure relates to a structure including: one or more devices on a front side of a semiconductor material; a plurality of patterned metal layers under the one or more devices, located and structured to protect the one or more devices from an active intrusion; an insulator layer between the plurality of patterned metal layers; and at least one contact providing an electrical connection through the semiconductor material to a front side of the plurality of metals.

Abstract: Reducing a sensitivity of an electromechanical sensor is presented herein. The electromechanical sensor comprises a sensitivity with respect to a variation of a mechanical-to-electrical gain of a sense element of the electromechanical sensor; and a voltage-to-voltage converter component that minimizes the sensitivity by coupling, via a defined feedback capacitance, a positive feedback voltage to a sense electrode of the sense element—the sense element electrically coupled to an input of the voltage-to-voltage converter component. In one example, the voltage-to-voltage converter component minimizes the sensitivity by maintaining, via the defined feedback capacitance, a constant charge at the sense electrode. In another example, the electromechanical sensor comprises a capacitive sense element comprising a first node comprising the sense electrode. Further, a bias voltage component can apply a bias voltage to a second node of the electromechanical sensor.

Abstract: Embodiments disclosed herein include a sensor wafer. In an embodiment, the sensor wafer comprises a substrate, wherein the substrate comprises a first surface, a second surface opposite the first surface, and an edge surface between the first surface and the second surface. In an embodiment, the sensor wafer further comprises a plurality of sensor regions formed along the edge surface, wherein each sensor region comprises a self-referencing capacitive sensor.

Abstract: A touch panel, including a touch electrode layer having a plurality of touch units arranged in a matrix, each of the touch units includes one touch driving electrode and one touch sensing electrode, a shape of the touch driving electrode is complementary with a shape of the touch sensing electrode; touch sensing electrodes of adjacent two touch units are connected, touch driving electrodes of adjacent two touch units are connected; and an edge of the touch driving electrode and an edge of the touch sensing electrode of that are complementary with each other in each of the touch units each are changed in a curved line. A manufacturing method of the touch panel, a touch screen and a display device are also disclosed.

Abstract: Multi-driving in touch sensing allows for reduced errors of the touch sensing by grouping touch electrodes according to sizes of their coupling capacitances and multi-driving them by group.

Abstract: The present invention provides a display device and a terminal. The display device includes a display panel and a touch layer. The touch layer includes a plurality of first touch electrodes and a plurality of second touch electrodes disposed in a same layer and not in contact with each other. The first touch electrodes and the second touch electrodes are alternately arranged in a first direction. The second touch electrodes include a plurality of touch units arranged in a second direction and connected with each other. Surface areas of the plurality of touch units in the same second touch electrode are not equal. The invention reduces a width of a flexible circuit board.

Abstract: Methods and apparatus are described for implementing a coding scheme on ultrasound signals received by a plurality of ultrasonic transducers. The coding, and subsequent decoding, may allow for multiple ultrasonic transducers to be operated in a receive mode simultaneously while still differentiating the contribution of the individual ultrasonic transducers. Improved signal characteristics may result, including improved signal-to-noise ratio (SNR).

Abstract: The disclosure is provided with a touch panel and driving control method thereof, and a touch display device. The touch panel includes: a first electrode, a second electrode, and a third electrode. The first electrode, the second electrode, and the third electrode are insulated from each other. The first electrode and the second electrode are crosswise arranged to form a touch film layer, and the second electrode and the third electrode are crosswise arranged to form a fingerprint identification film layer.

Abstract: The invention provides testing of a chemically-sensitive transistor device, such as an ISFET device, without exposing the device to liquids. In one embodiment, the invention performs a first test to calculate a resistance of the transistor. Based on the resistance, the invention performs a second test to transition the testing transistor among a plurality of modes. Based on corresponding measurements, a floating gate voltage is then calculated with little or no circuitry overhead. In another embodiment, the parasitic capacitance of at least either the source or drain is used to bias the floating gate of an ISFET. A driving voltage and biasing current are applied to exploit the parasitic capacitance to test the functionality of the transistor.

Abstract: A pressure touch control display apparatus and a control method therefor. The pressure touch control display apparatus includes a backlight module, a piezoelectric component and a monitoring circuit, wherein the piezoelectric component is arranged on a reflection sheet of the backlight module, and the piezoelectric component is deformed under the action of a pressure and generates an electrical signal corresponding to the pressure; and the monitoring circuit is electrically connected to the piezoelectric component, and the monitoring circuit is used for monitoring the electrical signal generated by the piezoelectric component.

Abstract: The present invention relates to a method by which an electronic device including a biosensor obtains biometric information in a section in which image data is not transmitted to a display. An electronic device according to various embodiments of the present invention comprises: a display; a biosensor formed in at least a portion of the display; and a processor functionally connected with the display, and the biosensor, wherein the processor can extend a blank section of a reference signal, which is any one of a plurality of signals for driving the display in a state of sensing the biometric information of a user, and can drive the biosensor in the extended blank section of the reference signal so as to sense the biometric information of the user. The present invention can also include additional various embodiments.

Abstract: A touch panel and a manufacturing method thereof, and a touch display device are provided. The touch panel includes a touch region, the touch region includes: a plurality of conductive portions arranged at intervals, a region in which the plurality of conductive portions are located including an electrode region; a plurality of electrical connection portions electrically connecting the conductive portions located in the electrode region to form a plurality of first electrodes extending in a first direction and a plurality of second electrodes extending in a second direction, the plurality of first electrodes being insulated from the plurality of second electrodes. In the second direction, each of the plurality of first electrodes includes at least two of the plurality of conductive portions; in the first direction, each of the plurality of second electrodes includes at least two of the plurality of conductive portions.

Abstract: A semiconductor chip includes at least two insulated vias passing through the chip from the front face to the rear face in which, on the side of the rear face, the vias are connected to one and the same conducting strip and, on the side of the front face, each via is separated from a conducting pad by a layer of a dielectric.

Abstract: A dielectric elastomer sensor system A1 is provided with an oscillation circuit 1 including a dielectric elastomer sensor element 11 having a dielectric elastomer layer 111 and a pair of electrode layers 112 sandwiching the dielectric elastomer layer 111, and with a determination circuit 2 configured to determine a change in a capacitance of the dielectric elastomer sensor element 11, based on an output signal from the oscillation circuit 1. The dielectric elastomer sensor element 11 changes in capacitance due to deformation caused by external forces of at least two mutually different directions. Such a configuration enables provision of a multifunctional dielectric elastomer sensor system and dielectric elastomer sensor element.

Abstract: A detection apparatus is provided including a touch detection surface serving as a detection region having two dimensions; and first electrode components including divided electrodes arranged in the touch detection surface, first connection lines connected to one of the divided electrodes on a one-to-one basis, and a detection unit configured to output a detection signal to the divided electrodes via the first connection lines, wherein the first connection lines has a first switch between a corresponding one of the divided electrodes and the detection unit, in each of the first electrode components, the first connection lines are connected to each other between the first switches and the detection unit, and in each of the first electrode components, the divided electrodes function as one first electrode when all the first switches are closed.

Abstract: The embodiments disclosed herein relate to a method for the capacitive detection of at least a contact of a capacitive sensor by an operator. The method includes providing the capacitive sensor and providing an electronic evaluation system; applying a first constant electric potential to the counter electrode of the capacitive sensor; applying a second constant electric potential, which differs from the first potential, to the counter electrode of the capacitive sensor; calculating a first parameter from the first measured value and the second measured value; calculating a second parameter from the first measured value and the second measured value; and respectively comparing the first parameter and the second parameter with a predefined quantity.

Abstract: A steering device includes: a gripping detection unit that detects that a steering wheel of a vehicle is gripped, when a capacitance detection value detected using a sensor electrode provided in the steering wheel increases beyond a predetermined gripping detection threshold value; and a manipulation input detection unit that detects occurrence of a manipulation input to the steering wheel, when the capacitance detection value decreases below a manipulation input detection threshold value set to be higher than the gripping detection threshold value from a state in which the capacitance detection value is higher than the manipulation input detection threshold value, and then increases beyond the manipulation input detection threshold value again without decreasing below the gripping detection threshold value.

Abstract: A blade tip sensor may be provided that includes a bridge-network circuit embedded in a composite body such as a ceramic matrix composite body. The bridge-network circuit may include a first resistor-capacitor circuit on a first branch and a second resistor-capacitor circuit on a second branch. Each of the first resistor-capacitor circuit and the second resistor-capacitor circuit includes a corresponding capacitor having a capacitance that depends on a distance between the corresponding capacitor and a blade of a rotor.

Abstract: An electrostatic discharge protection circuit including: a first electrostatic discharge diode including a cathode to receive a first voltage, and an anode connected to a sensing line; a first switching element to determine the first voltage as a precharging voltage applied to a source terminal of the driving transistor when a sensing operation is performed, and to determine the first voltage as a maximum voltage used in a display panel when the sensing operation is not performed; a second electrostatic discharge diode including a cathode connected to the sensing line, and an anode configured to receive a second voltage; and a second switching element configured to determine the second voltage as the precharging voltage when the sensing operation is performed, and to determine the second voltage as a minimum voltage used in the display panel when the sensing operation is not performed.

Abstract: A medical pump device for delivering a medical fluid includes a base body and elastomeric hollow membrane secured to the base body and arranged in such a way that a pump volume for filling with medical fluid is formed between the base body and hollow membrane. The hollow membrane, in an at least partially filled state of the pump volume, is elastically extended and exerts a delivery pressure on the pump volume. The medical pump device has a sensor system set up to determine the extension of the hollow membrane such that, by using the extension that is thus determined, filling level information concerning the filling state of the pump volume is determined. The medical pump device can be used in infusion or transfusion arrangements.

Abstract: A display device includes an active display array, an optical sensor array, a first driving circuit, a second driving circuit, and a third driving circuit. The active display array includes a number of scan lines. The first driving circuit is coupled to a first portion of the scan lines through a first metal layer. The second driving circuit is coupled to a second portion of the scan lines through the first metal layer. The third driving circuit is disposed between the first driving circuit and the second driving circuit and is coupled to the optical sensor through a second metal layer. The second metal layer is different from the first metal layer.

Abstract: A touch display device includes a display panel and a touch recognition module. The touch recognition module includes a first electrode layer disposed on the display panel, an insulating layer disposed on both the first electrode layer and the display panel, and a second electrode layer disposed on the insulating layer. The first electrode layer includes a plurality of first touch electrodes spaced apart from each other, and the second electrode layer includes a touch area and a fingerprint recognition area adjacent to the touch area.

Abstract: A plurality of sensors for application to a steering wheel or other generally toroidal objects is disclosed. In an embodiment, the sensor comprises interleaving transmit and receive conductors. In an embodiment, the sensor comprises crossing transmit and receive conductors. In an embodiment, sensor conductors are first provided on a flat substrate, which sensors placed on the flat substrate in a configuration that will permit expansion application of the substrate to the steering wheel.

Abstract: A touch sensor is provided having a sensing area comprising at least one drive conductor and one sense conductor. The drive conductor and the sense conductor are each disposed on the substrate such that, for any two given points on the drive conductor within the sensing area, the nearest point to each on the sense conductor within the sensing area is a different distance away. Drive and sense circuitry are used to measure a touch delta resulting from a given touch on the sensor. For a given touch, the measured touch delta will vary with the location of that touch along the length of the conductors. A third conductor may be added that has the same relationship with a middle (drive or sense) conductor. Repeating use of the two or three conductor patterns can be used to cover wider areas.

Abstract: The present disclosure provides a sensor and a touch screen display. The sensor includes: a plurality of touch units, each of which including: a plurality of driving electrodes and a plurality of sensing electrodes. The driving electrodes in each touch unit are arranged in at least two different directions, and some of the driving electrodes in each touch unit are arranged in a first direction, while some of the driving electrodes in each touch unit are arranged in a second direction. The sensing electrodes in each touch unit are arranged in at least two different directions, and some of the sensing electrodes in each touch unit are arranged in the first direction, while some of the sensing electrodes in each touch unit are arranged in the second direction. The driving electrodes in each touch unit are electrically connected, and the sensing electrodes in each touch unit are electrically connected.

Abstract: The invention relates to a sensor device (100) for the n capacitive detection of a user action in a vehicle (1), with a sensor element (110), which is configured as an electric line element, wherein the sensor element (110) comprises: an electrically conducting outer conductor element (112), at least one insulator element (120) for the electric insulation of the outer conductor element (112), an evaluation connection adaptation (20) on the outer conductor element (112) for the electrically-conducting connection of the outer conductor element (112) to an evaluation device (210) of the vehicle (1), whereby the detection can be performed. A test connection adaptation (10) in provided on the outer conductor element (112), in order to test a functional test of the sensor device (100) based upon an electric circuit with the outer conductor element (112).

Abstract: A vehicle console includes a trim ring disposed over a periphery of a housing. The trim ring includes a polymeric material and is electrically conductive and grounded. A proximity switch assembly is retained in the housing. The proximity switch assembly includes a proximity sensor proximate a sensing pad for generating an activation field. The sensing pad is proximate the trim ring.

Abstract: A touch sensor panel is disclosed. In some examples, the touch sensor panel includes drive electrodes and sense electrodes, wherein the drive electrodes and sense electrodes form touch nodes. In some examples, touch nodes include differently-sized drive and/or sense electrodes, and changes to the size or quantity of reference or floating electrodes disposed within the drive and/or sense electrodes are used to substantially balance the areas of the drive and/or sense electrodes in a given touch node.

Abstract: A fingerprint detection circuit includes: a pixel region and a power grid. The pixel region includes a first pixel region and a second pixel region. The second pixel region is arranged on a periphery of the first pixel region, the first pixel region is provided with a plurality of first pixels, and the second pixel region is provided with a plurality of second pixels. The power grid is arranged below the pixel region, and configured to provide a driving electrical signal for pixel electrodes of the plurality of first pixels and pixel electrodes of the plurality of second pixels, to detect a coupling capacitance formed between the pixel electrodes of the plurality of first pixels and a biological tissue and to cause, via the plurality of second pixels, capacitances of the pixel electrodes of the plurality of first pixels to ground to be consistent.

Abstract: Embodiments of the present disclosure provide a circuit, touch chip, and electronic device for capacitance detection, the circuit for capacitance detection comprising: a control module, a charge transfer module, a processing module, a driving module, and an offsetting module, the control module being configured to charge a detection capacitor by controlling the driving module, the offsetting module being configured to charge an offset capacitor, and control the offset capacitor to perform charge offsetting on the detection capacitor; the charge transfer module being configured to convert charge of the detection capacitor after the charge offsetting to generate an output voltage; and the processing module being configured to determine, based on the output voltage, a capacitance variation of the detection capacitor before and after the detection capacitor is affected by an external electric field.

Abstract: A device for detecting an object with respect to a detection surface including at least one measurement electrode and at least one guard electrode separated by a distance (D) that is elastically modifiable locally by a load exerted by the object on the detection surface; and structure for electrical polarization of the electrodes (V, E) arranged in order to: (i) apply to the measurement and guard electrodes one and the same first alternating electrical potential (Vg) so as to measure a first signal relating to an electrode-object capacitance (Ceo); and (ii) apply between the measurement and guard electrodes an alternating electrical potential difference (V1), so as to measure a second electrical signal relating to an electrode-guard capacitance (Ceg). A detection method utilizing the present detection device is also provided.

Abstract: A touch sensor panel comprising a first touch node electrode of a plurality of touch node electrodes, the first touch node electrode coupled to a first sense connection comprising a first set of traces, the first sense connection configured to have a first resistance per unit length that varies along a length of the first sense connection, and a second touch node electrode of the plurality of touch node electrodes, the second touch node electrode coupled to a second sense connection comprising a second set of traces, the second sense connection configured to have a second resistance per unit length that varies along a length of the second sense connection differently than the first resistance per unit length varies along the length of the first sense connection. An effective resistance of the first sense connection and the second sense connection are equal.

Abstract: The present disclosure discloses a circuit, touch chip, and electronic device for capacitance detection. The circuit for capacitance detection comprises: a control module (112), a charge transfer module (142), a processing module (152), a driving module (122), and an offsetting module (132), the control module (112) being configured to charge a detection capacitor (Cx) by controlling the driving module (122), the offsetting module (132) being configured to charge an offset capacitor (Cc), and control the offset capacitor (Cc) to perform charge offsetting on the detection capacitor (Cx); the charge transfer module (142) being configured to convert charge of the detection capacitor after the charge offsetting to generate an output voltage (VOUT); and the processing module (152) being configured to determine, based on the output voltage (VOUT), a capacitance variation of the detection capacitor (Cx) before and after the detection capacitor is affected by an external electric field.

Abstract: A device for touch and fingerprint recognition includes a touch screen and a cover plate disposed on the touch screen. The cover plate is a plastic film. The touch screen includes at least one first touch electrode disposed outside a fingerprint recognition region and at least one second touch electrode disposed in the fingerprint recognition region, and a distance between at least two adjacent second touch electrodes ranges from 5 ?m to 50 ?m.

Abstract: A voltage regulator and a power supply are provided. The voltage regulator includes an operational amplifier and an offset voltage control module. The offset voltage control module includes one or more stages of regulation branches connected in parallel, and controls an offset voltage of the operational amplifier with the one or more stages of regulation branches to regulate the output voltage.

Abstract: A device is provided. The device comprises a conductive element comprising one or more grooves, a capacitive field measurement element coupled to the conductive element, and a controller coupled to the capacitive field measurement element. The grooves comprise material with conductivity lower than the conductivity of the conductive element. The capacitive field measurement element is configured to measure change in the capacitive field in proximity of the grooves caused by physical interaction or proximity between the grooves and an external object, and provide the measurement to the controller. The controller is configured to trigger at least one function assigned to the one or more grooves when a change in the capacitive field in proximity of the one or more grooves is measured. Methods of operation and manufacture are also presented.

Abstract: A touch substrate includes a common electrode, a piezoelectric material layer and a touch electrode sequentially disposed on the substrate. The touch electrode includes a plurality of touch driving electrodes and a plurality of touch sensing electrodes, which cross with each other and are insulated from one another. The touch driving electrode includes a plurality of first touch sub-electrodes that are electrically connected. An overlapping area of front projections of the common electrode and each of the first touch control sub-electrodes on the substrate is smaller than an area of a pattern enclosed by a peripheral boundary of the first touch sub-electrodes.

Abstract: A piezoelectric sensor with: (i) a capacitive element, comprising piezoelectric material; (ii) a pre-conditioning circuit, comprising circuitry for establishing a polarization of the capacitive element in a polarizing mode; and (iii) signal amplification circuitry for providing a piezoelectric-responsive output signal, in response to charge across the capacitive element in a sensing mode.

Abstract: A constructive system regarding a capacitance electric voltage sensor comprises a source electrode (110, 210), a shielding tubular body (120, 220), an electric field sensor (130, 230) and a mass of dielectric insulating material (140, 240). The electric field sensor (130, 230) comprises at least one first inner sheet (131, 231) and a second outer sheet (132, 232) superimposed and joined together, wherein said first inner sheet (131, 231) is made by means of a conductive metal material, wherein said second outer sheet (132, 232) is made by means of an electrically insulating material, and wherein said second outer sheet (132, 232) made of insulating material is constrained with respect to the inner face (124, 224) of the shielding tubular element (120, 220).