140 results about "Capacitor" patented technology

A phase shift and duty cycle correction circuit is disclosed herein as comprising a programmable digital to analog converter (DAC), a storage device (e.g., a capacitor), a charge sub-circuit and dump sub-circuit for charging and discharging the storage device, respectively, a comparator, and a clock driver circuit. A linearly increasing (or ramped) voltage waveform is generated within the storage device by the charging and discharging actions of the charge and dump sub-circuits; a periodic process which is controlled by opposite phases of the input clock. By programming the DAC control input to change the slicing threshold of the ramped waveform, the circuit and method described herein provides a means for programmable phase shifting and duty cycle correction.

A polymer resin composition, a method for forming a pattern using the polymer resin composition, and a method for fabricating a capacitor using the polymer resin composition are disclosed. The polymer resin composition includes about 75 to 93 percent by weight of a copolymer prepared from benzyl methacrylate, methacrylic acid, and hydroxyethyl methacrylate; about 1 to 7 percent by weight of a cross-linking agent; about 0.01 to 0.5 percent by weight of a thermal acid generator; about 0.01 to 1 percent by weight of a photoacid generator; about 0.00001 to 0.001 percent by weight of an organic base; and a solvent.

The invention relates to an amorphous silicon image sensor with a storage capacitor structure, comprising a plurality of pixel units. Each pixel unit comprises a grid wiring, a first insulating layer, an active layer, a data wiring, a second insulating layer, a storage capacitor, a photosensitive diode, a passivation layer and a bias voltage wire, wherein the storage capacitor is arranged below the photosensitive diode; a lower electrode of the storage capacitor is formed on a glass substrate or the first insulating layer, and an upper electrode of the storage capacitor is formed on a dielectric layer and connected with a source electrode; a first electrode of the photosensitive diode is in co-electrode with the upper electrode of the storage capacitor; and a second electrode of the photosensitive diode is conductive with the lower electrode of the storage capacitor and the bias voltage wire. By means of the amorphous silicon image sensor disclosed by the invention, the charge storagecapacity of the pixel units is increased under the condition of not enlarging or reducing pixel dimensions by arranging the storage capacitor below the photosensitive diode, and therefore the purposeof enhancing the signal dynamic range of a thin film transistor matrix panel under the precondition of not losing the resolution ratio of the thin film transistor matrix panel is achieved.

A system and/or method for sensing the presence of moisture (e.g., rain) and/or other material(s) on a window such as a vehicle window (e.g., vehicle windshield, sunroof or backlite). In certain example embodiments of the invention, at least one sensing capacitor is supported by a window such as a vehicle windshield, the capacitor(s) having a field that is affected by moisture (e.g., rain) on a surface of the window. A sensing circuit outputs an analog signal that is based on and/or related to the capacitance(s) of the sensing capacitor(s). The analog output of the circuit may be converted to a digital signal via sigma-delta modulation, and subjected to processing (e.g., correlation) for determining whether moisture (e.g., rain, dew, fog, etc.) or the like is present on the surface of the window.

The invention discloses a pixel circuit, a driving method of the pixel circuit, a display panel, and a driving method of the display panel. The pixel circuit comprises a first transistor, a drive transistor, a second transistor, a threshold value compensation module, a first capacitor, a second capacitor, a light-emitting element and a fifth transistor, wherein the first transistor is used for transmitting a signal of a data signal end to a first node by responding to an enable signal of a scanning signal end; the threshold value compensation module is used for transmitting the signal of the first node to a second node through the drive transistor by responding to an enable signal of a second on-off control signal end; a first pole plate of the first capacitor is electrically connected tothe first node. For the pixel circuit provided by the invention, the data writing stage is carried out first, the initialization stage, the compensation stage and the light emitting stage are then carried out, the time of the compensation stage of the pixel circuit can be increased, and the compensation effect is promoted.

A sealed capacitive sensor includes a substrate having a diaphragm forming a first plate of a capacitor; a second fixed plate of the capacitor spaced from the diaphragm and defining a predetermined dielectric gap and a sealing medium connecting together the substrate and fixed plate in an integrated structure and hermetically sealing the gap.

A capacitive liquid level detector for detecting a liquid level of a liquid in a receptacle, the liquid being conductive, the detector comprising: a capacitor with a first plate having a fixed size and being insulated from the liquid, and a second plate being formed by the liquid itself, its size being variable depending on the liquid level inside said receptacle, wherein a thin film dielectric layer is formed on the surface of the first plate and located between the first plate and the second plate, the first plate with the thin film dielectric layer formed on its surface is arranged such that it covers an open part of the outer wall of the receptacle, the first plate with the thin film dielectric layer formed on its surface is attached to the receptacle by sealing means in order to seal the receptacle against liquid leakage.

The invention relates to the technical field of integrated circuits, in particular to a current mirror. The current mirror is characterized in that the current mirror is composed of a PMOS transistor MP1, a PMOS transistor MP2, an NMOS transistor MN1, a capacitor C1, a capacitor C2, a resistor R1, an input current source, an output end current source and a bias current source. The source electrode of the MP1 is connected with a power source VCC, the grid electrode of the MP1 is connected with the grid electrode of the MP2, and the drain electrode of the MP1 is connected with positive electrode of the input current source. The negative electrode of the input electrode source is grounded VSS. The drain electrode of the MN1 is connected with the power source VCC, the grid electrode of the MN1 is connected with the positive electrode of the input current source, the source electrode of the MN1 is connected with the positive electrode of the bias current source, and the substrate of the MN1 is connected with a connection point of the grid electrode of the MP1 and the grid electrode of the MP2 through the R1. A connection point of the source electrode of the MP1 and the drain electrode of the MN1 is connected with a connection point of the grid electrode of MN1 and the positive electrode of the input current source through the C1 and the C2 sequentially. The source electrode of the MP2 is connected with the power source VCC, and the drain electrode of the MP2 is connected with the positive electrode of an output current source. The current mirror has the advantages of being suitable for being used under low supply voltage, meanwhile improving the PSR of the current mirror, and being especially suitable for a current mirror circuit.

An orientation-insensitive ultra-wideband coupling capacitor. The orientation-insensitive ultra-wideband coupling capacitor includes a plurality of external surfaces, a low frequency portion, and a high frequency portion. The high frequency portion is so disposed on, and electrically connected to, the low frequency portion so as to allow the orientation-insensitive ultra-wideband coupling capacitor to work identically when mounted on any external longitudinal surface of the plurality of external surfaces thereof and thereby be readily SMT compatible without regard to special orienting procedures.

The invention discloses a sampling hold circuit which comprises a clock generation sub-circuit, a grid voltage bootstrap unit and a sampling hold sub-circuit, wherein the clock generation sub-circuit is provided with a first output end and a second output end, the first output end and the second output end are both connected with the grid voltage bootstrap unit, the sampling hold sub-circuit comprises a sampling switch and a holding capacitor, and the grid voltage bootstrap unit is further connected with an external power supply and the sampling switch. The sampling hold circuit further comprises a leak-proof sub-circuit which is connected between a bootstrap capacitor of the grid voltage bootstrap unit and the ground, and the leak-proof sub-circuit is further connected with the clock generation sub-circuit and the external power supply. When the sampling hold sub-circuit is switched from a hold mode to a sampling mode, the bootstrap capacitor and the ground are disconnected by the leak-proof sub-circuit. According to the sampling hold circuit, leakage of electric charge on the bootstrap capacitor in a hold and sampling switching process is effectively prevented, and reducing of bootstrap voltage is prevented, and the degree of linearity of the sampling switch is guaranteed.

The invention discloses a main circuit of a three-phase four-wire DC/AC convertor and a control method thereof. The main circuit comprises two power semiconductor switches G1 and G2, two diodes D1 and D2, a capacitance branch and an inductor L1, wherein the two power semiconductor switches G1 and G2 are connected with a bridge arm with midpoint drifting control in series from top to bottom; the two diodes D1 and D2 are connected with power semiconductor switches in parallel reversedly; the capacitance branch is connected with the bridge arm with the midpoint drifting control in parallel; the capacitance branch is formed by two series capacitors C1 and C2; and one end of the inductor L1 is connected with the point of common coupling (PCC) of the two semiconductor switches G1 and G2, and the other end of the inductor L1 is connected with the PCC of the two series capacitors C1 and C2, as well as a midcourt line in the three-phase four-wire convertor is led out, namely an N line. In the invention, the bridge arm in a midpoint control circuit and three bridges of a three-phase convertor can be controlled respectively and independently, thus realizing decoupling control of a three-phase four-bridge arm convertor. Under the condition of three phase imbalance, simple voltage current feedback control or proportional-integral (PI) control is used to control the midpoint, so that the midpoint drifting control can be finished.

A circuit for attenuating a surge is disclosed that might include a conductor for receiving the surge, a capacitor, positioned along the conductor, for blocking the surge, and a gas tube having a first end coupled to the conductor and a second end coupled to a ground. The circuit might also include a transformer having a first wire and a second wire, the transformer being coupled to the conductor, a resistor coupled to the first and second wires of the transformer, a varistor coupled to the first wire of the transformer, and a diode coupled to the second wire of the transformer.

The invention belongs to the technical field of ferroelectric memories and particularly relates to a non-volatile ferroelectric memory with high read current and an operation method thereof. Each storage unit of the non-volatile ferroelectric memory is of an in-plane capacitor structure or up-down capacitor structure; polarization directions of ferroelectric materials are respectively vertical to electrodes; when enough large write voltage opposite to an electric domain polarization direction of a ferroelectric is applied to the two electrodes, ferroelectric domains in the corresponding regions of the electrodes are inversed from the polarization direction along an electric field direction, the electric domain polarization direction between the electrodes is opposite to the peripheral ferroelectric domain polarization direction, a domain wall is formed between the two electric domains, and the domain wall is usually an electric channel; when information is read, the read current of the electric channel is directly proportional to the perimeter of the electric domain wall, the longer the perimeter of the electric domain wall is, the larger the read current is. According to the ferroelectric memory of the invention, the read current in the storage unit can be improved to be helpful for improving the read speed of data and the reliability.

The invention relates to the technology of a power source and an integrated circuit, in particular to a DC-DC converter with the output voltages capable of being adjusted quickly. The DC-DC converter comprises a driving circuit, a PMOS tube MP, an NMOS tube MN, a PWM comparator, an EA amplifier, an inductor L, a capacitor C, a resistor R and a power source Vin. The DC-DC converter is characterized in that a calculating amplifier is further included, the driving circuit, the PMOS tube MP, the NMOS tube MN, the PWM comparator, the EA amplifier, the inductor L, the capacitor C, the resistor R and the power source Vin form a traditional DC-DC converter, and the positive input end and the output end of the calculating amplifier are connected to be used as one end, connected to the capacitor C, of a bumper. The DC-DC converter has the advantages of being simple in structure, easy to achieve, low in power consumption, and capable of achieving quick adjusting of the output voltages of the DC-DC converter only by small domain area. The DC-DC converter is particularly suitable for DC-DC converters.

The invention discloses a module combined power quality conditioning system for a tractive power supply network, which belongs to the field of power quality improvement of a tractive power supply system. A power quality conditioner (101) is connected into a secondary output terminal of a traction transformer (66) and power supply arms of the traction power supply network in parallel, the energy of the two power supply arms is stored and exchanged through an energy storage capacitor at the direct current side of a power unit, and the balance of the three-phase current at the high-voltage side of the traction transformer (66) can be realized after the system is stabilized; and the power quality conditioner (101) can synchronously compensate the harmonic wave and the reactive power for each phase under the reasonable control strategy. The provided module combined power quality conditioning system for the tractive power supply network can directly run in the network without an industrial frequency transformer and an external reactor, realizes the high-voltage high-power input and the high-voltage high-power output by using the low-voltage power device and has the advantages of small occupied area, less loss and low cost.

A component assembly that can be easily built in a main substrate with high accuracy is formed such that a glass transition temperature of a built-in-component layer of an assembly substrate in which multiple capacitors are embedded is higher than a glass transition temperature of a built-in-component layer of a built-in-component substrate. Thus, thermal deformation of the component assembly is prevented when the built-in-component substrate in which the component assembly is built is heated during reflow, for example. The component assembly can thus be highly accurately built in the built-in-component substrate. Moreover, when the component assembly in which the multiple capacitors are embedded is built in the built-in-component substrate, electrode pads of the component assembly in which the multiple capacitors are embedded can be electrically connected to wiring layers of the built-in-component substrate by soldering despite the variation in height among the capacitors.

A driving apparatus for a plasma display panel with a pulse generator to supply an alternating pulse to an electrode, and an energy recovering unit to store charges from a discharge cell when the pulse voltage decreases or to output the stored charges to the discharge cell when the pulse voltage increases. The energy recovering unit has a magnetic switch, coupled with the discharge cell and an energy storage capacitor, with variable inductance to control transient time when the pulse transitions from a first voltage to a second voltage. The transient time is based on LC resonance of the magnetic switch inductance and panel capacitance, and can be reduced to improve resolution of the panel. Insulated gate bipolar transistors can be used with the magnetic switches to reduce power loss during switching and in the on-state, and can sustain high voltages necessary for high concentration Xe discharge gas.

Provided is a clock generator employed in a continuous-time sigma-delta modulator. The clock generator includes an oscillator configured to generate pulses in response to an enable signal, a counter configured to count the number of pulses generated by the oscillator and output the total pulse count, and an output circuit configured to output an inactivated output signal if the pulse count of the counter is equal to a pulse-width control bit. The oscillator includes an astable multi-vibrator. Since the astable multi-vibrator capable of generating a low-jitter pulse from a jittered clock is used as the oscillator, a signal-to-noise ratio is improved. A simple configuration using only digital circuits makes it easier to design a circuit and adjust pulse width. Moreover, according to the structure of the astable multi-vibrator, it is possible to design a circuit to optimally modulate pulse width in connection with process variations of resistors and capacitors used in the continuous-time sigma-delta modulator.

The invention relates to a charge pump which comprises a pump capacitor, a switch module, a first switch, a switching switch, an output capacitor and a wave interruption circuit, wherein the pump capacitor is used for generating pump voltage, the switch module and the first switch are respectively coupled with both ends of the pump capacitor, and the switching switch is coupled with the first switch and the pump capacitor to switch the pump capacitor to output the pump voltage. The output capacitor is coupled with the switching switch and the pump capacitor to output the pump voltage output bythe pump capacitor, and the wave interruption circuit is coupled between the pump capacitor and the output capacitor to avoid the conduction of a parasitic transistor of the switching switch so as toavoid charge loss, so that the power efficiency of the charge pump is improved, the ascending or descending time of the output voltage is reduced when started, and the reliability of a circuit underthe environment of high temperature is increased.

Provided is rolled supercapacitor comprising an anode, a cathode, a porous separator, and an electrolyte, wherein the anode contains a wound anode roll of an anode active material having an anode roll length, an anode roll width, and an anode roll thickness, wherein the anode active material contains isolated graphene sheets that are oriented substantially parallel to the plane defined by the anode roll length and the anode roll width; and/or the cathode contains a wound cathode roll of a cathode active material having a cathode roll length, a cathode roll width, and a cathode roll thickness, wherein the cathode active material contains isolated graphene sheets that are oriented substantially parallel to the plane defined by the cathode roll length and the cathode roll width; and wherein the anode roll width and/or the cathode roll width is substantially perpendicular to the separator.

An electric power generation system employs a thermoelectric generator placed between an aircraft inner skin and an aircraft outer skin. The thermoelectric generator is configured to utilize a thermal differential between the inner and outer skin to generate an electric current. An electrical interface is provided for access to the electric current generated by said thermoelectric generator.