72 results about "Body capacitance" patented technology

The invention discloses a touch screen panel, a touch display panel and a display device. An electromagnetic shielding layer is arranged above wires, and projections of the wires on a first substrate are at least partially positioned in the range of the electromagnetic shielding layer. Therefore, the embodiment of the invention has at least one of the advantages that the influence of body capacitance on the wires in the range where the electromagnetic shielding layer is located can be shielded by the electromagnetic shielding layer, so that noise produced by the wires in the range of the electromagnetic shielding layer is eliminated to reduce the influence of the noise on the wires on touch sensing signals on touch electrodes and further increase the touch signal-to-noise ratio of the touch screen panel.

In accordance with this invention the above and other problems are solved by a switching apparatus and method that uses a switching circuit having a pair of parallel solid-state diodes (e.g., PN diodes), one of which is connected to a transistor (e.g., power MOSFET or IGBT), to switch a capacitor in or out of a variable capacitance element of an impedance matching network. Charging a body capacitance of the transistor reverse biases one of the two diodes so as to isolate the transistor from the RF signal enabling a low-cost high capacitance transistor to be used. Multiple such switching circuits and capacitors are connected in parallel to provide variable impedance for the purpose of impedance matching.

According to an exemplary embodiment, a voltage controlled oscillator includes a PFET having a first gate terminal, a first source terminal, a first drain terminal, and a first body terminal, where the first source terminal is coupled to a bias voltage and the first body terminal is coupled to a first tuning voltage. The voltage controlled oscillator does not include a discrete varactor diode. The voltage controlled oscillator further includes an NFET having a second gate terminal, a second source terminal, a second drain terminal, and a second body terminal, where the second body terminal is coupled to a second tuning voltage. The first and second drain terminals drive an output of the voltage controlled oscillator, where a frequency of the output is responsive to a change in the first tuning voltage. The change in the first tuning voltage causes a change in source-to-body capacitance of the PFET.

In accordance with this invention the above and other problems are solved by a switching apparatus and method that uses a switching circuit having a pair of parallel solid-state diodes (e.g., PN or PIN diodes), one of which is connected to a transistor (e.g., power MOSFET or IGBT), to switch a capacitor (or reactance element) in or out of a variable capacitance element (or variable reactance element) of an impedance matching network. Charging a body capacitance of the transistor reverse biases one of the two diodes so as to isolate the transistor from the RF signal enabling a low-cost high capacitance transistor to be used. Multiple such switching circuits and capacitors (or reactance elements) are connected in parallel to provide variable impedance for the purpose of impedance matching.

The invention features a conducting system which when attached to an object, the system converts the object into input device used to input functions on a touch screen device. The system features a material having an active capacitive layer with an antenna design which stores an electrical charge that is substantially similar to a human's body capacitance. Additional layers may be provided for attaching the material and protecting the material.

The invention provides an anti-fatigue cushion intelligent control unit. The intelligent control unit comprises a one-chip microcomputer control module, a temperature sensor module, a human body capacitance sensor module, an alarm module, a massage module, a timer module, a heating physiotherapy module and a refrigeration and heat radiation module, and the one-chip microcomputer control module is respectively connected with a power supply module, a pressure sensor module, the temperature sensor module, the human body capacitance sensor module, the alarm module, the timer module, the heating physiotherapy module, the refrigeration and heat radiation module and a manual setting module. A temperature sensor collects temperature data of surrounding environment and a cushion and human body contact surface, the heating physiotherapy module and the refrigeration and heat radiation module provide a most comfortable temperature for a user, the timer module records the sitting time of the user, the alarm module regularly prompts the user to depart from the cushion and properly take a rest, and the massage module can provide basic massage, so the anti-fatigue cushion intelligent control unit has the advantages of convenient and safe use, and alleviation of fatigue induced by long-time sitting.

A voltage controlled oscillator (VCO), IC and CMOS IC including the VCO. The VCO includes an LC tank circuit, a pair of cross-coupled devices connected to the tank circuit and driving a pair of buffers. Each of the pair of cross-coupled devices includes a field effect transistor (FET) with an independently controllable body, e.g., the surface layer of a Silicon on Insulator (SOI) chip or the surface well of a multi-well chip. Diodes in the multi-well structure are biased off in each device. The tank circuit is coupled to the buffers solely through the FET drain to body capacitance.

The invention discloses an in cell touch panel and a display device. The in cell touch panel comprises a lower substrate, an upper substrate, a self-capacitance electrode, a ground electrode and a driving circuit, wherein the lower substrate and the upper substrate are arranged in a face-to-face mode, the self-capacitance electrode is arranged between the upper substrate and the lower substrate, the ground electrode corresponds to the self-capacitance electrode, and the driving circuit is used for applying signals to the self-capacitance electrode and the ground electrode. The driving circuit is used for applying the same touch control scanning signals to the self-capacitance electrode and the ground electrode at the same time in the touch control stage. In this way, when the signals on the to the self-capacitance electrode and the signals on the ground electrode are the same in the touch control stage, the voltage of the self-capacitance electrode and the voltage of the ground electrode are equal all the time theoretically, namely, the difference between the voltage of the self-capacitance electrode and the voltage of the ground electrode is equal to zero, and therefore the capacitance of the self-capacitance electrode relative to the ground electrode is equal to zero. Due to the fact that the Base capacitance of the self-capacitance electrode is relatively smaller, the body capacitance can be larger than the Base capacitance when a human body conducts touch control, the relative change quantity of the capacitance can be large, and the purposes of increasing the touch control signal-to-noise ratio and improving the touch control sensitivity of the touch panel are achieved.

Devices that couple to high voltage transmission lines obtain power themselves using the body capacitance of an element of the devices. The devices generate a comparatively lower voltage from the current flowing between the high voltage line and the element of the device that generates the body capacitance. The devices can be used to operate sensors that monitor the transmission lines or parameters of the power distribution system, such as current, line temperature, vibration, and the like. The devices can also be used as indicators, such as aircraft warning lights, information signs, etc. In addition, the devices can operate as RF transmission / reception or repeater devices, radar devices, mesh networking nodes, video / audio surveillance, sound emitting devices for scaring animals, drones that traverse the power line, etc. Because the devices operate in response to line voltage rather than current, the devices are reliable even in low current conditions.

The invention discloses an intelligentized body capacitance multi-point touch induction antitheft device which is composed of a master controller and a plurality of capacitance touch inductors. A single-chip microcomputer chip and a detection control circuit are arranged in the master controller, capacitive body induction chips with an automatic correction function are adopted in the touch inductors, the capacitive body induction chips are small in appearance and can be mounted at any position of the back face of nonmetal matter in a motor vehicle cab according to the type of a motor vehicle and the operation habits of a vehicle owner, and the elusive performance is strong. An oiling diagram of the motor vehicle can be disconnected in the antitheft state, a driver needs to carry out unlocking through the touch inductors, the touch inductors can be selected to be mounted, the unlocking mode of the combined touch and sequential touch of a single point and multiple points is formed, multiple unlocking combinations exist, and passwords are hard to crack. The device is suitable for fuel oil motor vehicles such as small vehicles and motorcycles, and has the advantages that the antitheft performance is high, and the unlocking operation is convenient, simple and intelligent. The invention further discloses an antitheft method.

The invention discloses a method for detecting comprehensive skin data. The method is that an oscillating circuit is used for acquiring data; a single-chip microcomputer is used for recording and calculating data and receiving the data through a mobile terminal; the capacitance value and the resistance value of human body capacitance and human body resistance are calculated by the frequency formula of F=1.44 / ((R1+2R2)*C1) based on the tested moisture data and then converted into water percent and oil percent; then the human body water data and the human body oil data can be obtained according to the set sheet; then the comprehensive skin indicators can be evaluated according to the set range, and the indicators can be used as the reference for skin care or treatment. The method is small in power consumption, fast, and stable and accurate in detection data.

A structure and method for reducing second-order harmonic distortion in FET devices used in applications that are sensitive to such distortion, such as switching RF signals. The asymmetry of the drain-to-body capacitance Cdb and source-to-body capacitance Csb of a FET device are equalized by adding offsetting capacitance or a compensating voltage source.

The invention discloses a capacitive MEMS sensor detection circuit. The circuit is used to detect the displacement change of a pole plate of a MEMS. The capacitive MEMS sensor detection circuit mainly comprises a high-frequency oscillation circuit generating sine waves, two C-1 / V detection circuits, a differential amplification circuit, a phase shift network, a multiplication circuit, a low-pass filter circuit, and an amplification output circuit. The high-frequency oscillation circuit generates three in-phase sine waves, two of which are supplied to the two C-1 / V detection circuits to detect C-1 change caused by the displacement of the pole plate of the MEMS. The differential amplification circuit is used to eliminate the influence of body capacitance and improve the precision of detection. The phase shift network is used to compensate phase shift through the C-1 / V circuits and ensure that the signals input to the multiplication circuit are of the same phase. The low-pass filter circuit filters high harmonics of signals output by a multiplier and extracts the signals reflecting the displacement change of the pole plate of the MEMS so as to complete detection of the displacement change of the pole plate of the MEMS.

A semiconductor structure having a body capacitance plate, which is formed with a process that assures that the body capacitance plate is self-aligned to both the source line (SL) diffusion and the bitline diffusion is provided. Thus the amount of overlap between the SL and the bitline diffusions and the body capacitance plate is precisely controlled. More specifically, the present invention forms the structure of a 1T-capacitorless SOI body charge storage cell having sidewall capacitor plates using a process that assures that there is 1) minimal overlap between plate and source / drain diffusions, and 2) that the minimal overlap obtained in the present invention is precisely controlled and is not subject to alignment tolerances. The inventive cell results in larger signal margin, improved performance, smaller chip size, and reduced dynamic power dissipation relative to the prior art.