904results about How to "Simple circuit configuration" patented technology

An LC parallel resonance circuit is connected in series with the power supply side of the antenna conductor portion. The antenna conductor portion is configured so as to resonate at a frequency slightly lower than the center frequency in the higher frequency band of two frequency bands for transmitting and receiving radio waves. The LC parallel resonance circuit is configured so as to resonate substantially at the center frequency in the lower frequency band for transmitting and receiving a radio wave and be capable of providing to the antenna conductor portion a capacitance for causing the antenna conductor portion to resonate at the center frequency in the higher frequency band. Thus, a circuit for changing the upper and lower frequency bands is not needed. Such a change-over circuit, which is complicated, causes problems in that the conduction loss increases, and the antenna sensitivity deteriorates. Without need of the change-over circuit, the conduction loss can be reduced, the antenna sensitivity can be enhanced and costs can be reduced.

PCT No. PCT / JP96 / 01775 Sec. 371 Date Jan. 31, 1997 Sec. 102(e) Date Jan. 31, 1997 PCT Filed Jun. 26, 1996 PCT Pub. No. WO97 / 01863 PCT Pub. Date Jan. 16, 1997A crystalline semiconductor layer can be formed by forming a semiconductor film on an inexpensive conventional substrate. Next, perform a first annealing process in which nearly the entire surface of the semiconductor film is exposed to laser irradiation or other forms of irradiation, and then perform a second annealing process consisting of rapid thermal annealing. This enables the formation of a high quality crystalline semiconductor film with high throughput but without subjecting the substrate to undue thermal stress. When this invention is applied to thin film transistors, good transistors having high performance are easily fabricated. When this invention is applied to solar cells, energy conversion efficiency is increased.

A switching power supply device may include a switching element for switching an input direct-current power, a smoothing section for smoothing and then outputting the direct-current power switched by the switching element, a square wave generating section for generating a square wave with a constant duty cycle to control switching by the switching element, and a control section for watching an output voltage of the smoothing section to control a period of generating the square wave generated by the square wave generating section so that the output voltage may be organized within a certain range.

A semiconductor switch is provided with a main element having reverse conductivity and serving as a voltage-driven switching element having a high withstand voltage, an auxiliary element serving as a voltage-driven switching element having a withstand voltage lower than that of the main element, and a high-speed freewheel diode having a withstand voltage equal to that of the main element, wherein a negative pole of the main element is connected to a negative pole of the auxiliary element to define the positive pole of the main element as a positive pole terminal and the positive pole of the auxiliary element as a negative pole terminal, and the high-speed freewheel diode is parallel-connected between the positive pole terminal and the negative pole terminal so that a direction from the negative pole terminal toward the positive pole terminal constitutes a forward direction.

An electrically insulated type of switching element drive circuit supplies an AC voltage via a transformer to a control electrode drive circuit that controls a switching element, with the frequency or amplitude of the AC voltage being modulated in accordance with required on / off operation of the switching element, and with the output AC voltage from the transformer being rectified to obtain a DC supply voltage that is continuously supplied to the control electrode drive circuit. The control electrode drive circuit detects a condition of the AC voltage and controls the switching element accordingly.

The present invention is intended to attain simplified circuit configuration and low current consumption in a discrete time amplifier circuit and an AD converter, to improve the convergence from the transient response state to the steady state of the amplifier circuit and to reduce noise and distortion owing to the variation in the output common-mode voltage. The discrete time amplifier circuit and the AD converter are provided with a switched-capacitor common-mode feedback (CMFB) circuit capable of detecting and feeding back the output common-mode voltage at every sampling timing in the case that the circuit operates at double sampling timing (every ½ cycle).

The present invention provides a multi-input A / D converter circuit capable of shorting a conversion time without increasing its layout area and current consumption. When a most significant bit of a binary counter is “L”, individual input signals are sampled by a sample and hold unit, and digital signals held in respective data holders are sequentially selected by a selector. When the most significant bit is brought to “H”, the respective input signals are held as analog signals and compared with each of reference voltages produced corresponding to a digital signal by a DAC. When decision signals outputted from comparators are changed from “L” to “H”, the digital signal at that time is held in the individual data holders as digital signals.

The present invention relates to an optical identification tag, a reader, and a system, and more particularly, to an optical identification tag which transmits its identification information using energy input in an optical form, and an optical identification system and reader using the optical identification tag. The present invention provides an optical identification tag and an optical identification reader. The optical identification tag includes a solar cell for converting incident light into an electrical energy, a circuit for providing a transmitted electrical signal corresponding to identification information, and a light emitter for providing a transmitted optical signal corresponding to the transmitted electrical signal, and the optical identification reader provides the incident light to the optical identification tag, and receives the transmitted optical signal from the optical identification tag.

Relative comparison is made between a voltage applied to the whole of the first through eighth LEDs and a voltage applied to the first LED by a comparator. When the voltage applied to the whole of the LEDs has relatively dropped with respect to the voltage applied to part of the LEDs, the comparator outputs a Low Level signal, assumes an abnormality that accompanies a short-circuit fault in any one of the LEDs and causes a ninth LED to illuminate. Meanwhile, relative comparison is made between a voltage applied to the whole of the first through eighth LEDs and a voltage applied to the first LED by another comparator. When the voltage applied to the whole of the LEDs has relatively dropped with respect to the voltage applied to part of the LEDs, the comparator outputs a Low Level signal, assumes an abnormality that accompanies a short-circuit fault in the first LED and causes a ninth LED to illuminate.

Methods and devices for fabricating AlGaN / GaN normally-off high electron mobility transistors (HEMTs). A fluorine-based (electronegative ions-based) plasma treatment or low-energy ion implantation is used to modify the drain-side surface field distribution without the use of a field plate electrode. The off-state breakdown voltage can be improved and current collapse can be completely suppressed in LDD-HEMTs with no significant degradation in gains and cutoff frequencies.

A logic gate is constructed of an insulated gate field effect transistor (MIS transistor) having a thin gate insulation film. An operation power supply line to the logic gate is provided with an MIS transistor having a thick gate insulation film for switching the supply and stop of an operation power source voltage. A voltage of the gate of the power source switching transistor is made changing in an amplitude greater than an amplitude of an input and an output signal to the logic gate. Current consumption in a semiconductor device configured of MIS transistor of a thin gate insulation film can be reduced and an power source voltage thereof can be stabilized.

The present invention provides a multi-input A / D converter circuit capable of shorting a conversion time without increasing its layout area and current consumption. When a most significant bit of a binary counter is “L”, individual input signals are sampled by a sample and hold unit, and digital signals held in respective data holders are sequentially selected by a selector. When the most significant bit is brought to “H”, the respective input signals are held as analog signals and compared with each of reference voltages produced corresponding to a digital signal by a DAC. When decision signals outputted from comparators are changed from “L” to “H”, the digital signal at that time is held in the individual data holders as digital signals.

The force or pressure sensor array of the present invention effectively has both flexibility and elasticity. Since the substrate itself is a kind of a polymer material, the substrate can be bent or expanded. Although silicon, which is a material of the semiconductor strain gauge, is easily broken and solid, mechanical flexibility can be secured if it is fabricated extremely thin. To this end, particularly, disclosed is a flexible force or pressure sensor array using semiconductor strain gauges 110, the sensor array comprising: a substrate 10 including: the semiconductor strain gauges 110 in which a plurality of elements formed in a certain array pattern is deformed by force or pressure, a pair of polymer film layers 120 and 130 having film surfaces contacted facing each other and containing the semiconductor strain gauge 110 between the film surfaces contacted with each other, and a pair of signal line layers formed on top and bottom surfaces of an insulating layer using either of the pair of polymer film layers 120 and 130 as the insulating layer and connected to the elements 111 of the array pattern to form electrodes, for fetching deformation signals outputted due to deformation of the elements 111 to outside; and a pair of elastomer layers 20 and 30 formed on both sides of the substrate 10 to contain the substrate 10 inside.

A sensor comprises a semiconductor pellet (10) including a working portion (11) adapted to undergo action of a force, a fixed portion (13) fixed on the sensor body, and a flexible portion (13) having flexibility formed therebetween, a working body (20) for transmitting an exterted force to the working portion, and detector means (60-63) for transforming a mechanical deformation produced in the semiconductor pellet to an electric signal to thereby detect a force exerted on the working body as an electric signal. A signal processing circuit is applied to the sensor. This circuit uses analog multipliers (101-109) and analog adders / subtracters (111-113), and has a function to cancel interference produced in different directions. Within the sensor, two portions (E3, E4-E8) located at positions opposite to each other and producing a displacement therebetween by action of a force are determined. By exerting a coulomb force between both the portions, the test of the sensor is carried out. Further, a pedestal (21, 22) is provided around the working body (20). The working body and the pedestal are located with a predetermined gap or spacing therebetween. A displacement of the working body is caused to limitatively fall within a predetermined range corresponding to the spacing. The working body and the pedestal are provided by cutting a same common substrate (350, 350')

The invention provides a display device including: a light source that emits a plurality of light-source lights having intensities different from one another at points in time different from one another from a back side opposite a display surface that is pointed by pointing means toward the display surface; a detecting unit that is provided at the back side and functions to detect a plurality of reflected lights, which are obtained as a result of reflection of the plurality of light-source lights by the pointing means; and an identifying unit that identifies the position of the pointing means on the basis of each of a plurality of third images by calculating a finite difference value between brightness data of a first image that is generated on the basis of one reflected light among the plurality of reflected lights and brightness data of each of a plurality of second images that is generated on the basis of a plurality of other reflected lights among the plurality of reflected lights, the above-mentioned plurality of other reflected lights having an intensity that differs from that of the above-mentioned one reflected light, and then by generating each of the plurality of third images on the basis of the corresponding one of the plurality of calculated finite difference values.

In a sampling and holding, a control logic circuit connects another end of each capacitor of a DA converter to a ground potential, and outputs a sampled input analog signal from a switched amplifier to one end of a hold capacitor to hold. In a successive approximation, it controls a switched amplifier to set an output terminal thereof to a high-impedance state and the hold capacitor to connect the one end thereof to the ground potential. Then, it switches over connection of another end of each capacitor from the ground potential to a power supply voltage based on a digital value held by a successive approximation register to output an output voltage from another end of the hold capacitor to a comparator, and compares the output voltage from another end thereof with an intermediate reference voltage to obtain a digital value from the successive approximation register.

A circuit board device includes a circuit board comprising a mounting area, and first and second power lines and a ground pad formed on the mounting area, and a vertical multilayer chip capacitor (MLCC) comprising a capacitor body, a plurality of first and second polarity inner electrodes, first and second outer electrodes, and a third outer electrode, wherein the first and second power lines are separately disposed on the mounting area, connected to the first and second outer electrodes, and electrically connected to each other only by the vertical MLCC, and the ground pad is disposed between the first and second power lines and connected to the third outer electrode.

In a data multiplexing device which multiplexes and transmits the transport stream packets of program data consisting of a plurality of data elements constructed in the form of transport stream packets, a program distribution system, a program transmission system, a pay broadcast system, a program transmission method, a conditional access system, and a data reception device according to the present invention, by generating a scramble key Ks corresponding to one or more data elements among the plurality of data elements constituting a program and by scrambling each data element, an audience can subscribe for each data element.

A high frequency switch device has SPDT(A), SPDT(B), and SPDT(C) switches, each having one pole and a first port and a second port, wherein the second port of the SPDT(A) is grounded via a terminating resistor and the second port of the SPDT(B) is grounded via a terminating resistor, respectively, and the first port of the SPDT(A) and the first port of the SPDT(B) are respectively connected to the first port and the second port of the SPDT(C).

An active matrix liquid crystal display apparatus that is adaptive for eliminating a flicker and a residual image as well as simplifying the circuit configuration thereof. In the apparatus, a plurality of pixels each includes a switching transistor having a second electrode connected to a gate electrode, a first electrode and a pixel electrode. Each of pluralities of data signal lines is connected to the second electrode associated with any one of the transistors, and each of pluralities of gate signal lines is connected to the gate electrode associated with any one of the transistors. A gate driver is connected to the plurality of gate signal lines, and it receives first and second voltages and outputs any one of the first and second voltages to drive the gate signal lines sequentially. The first voltage changes prior to exciting of successive gate signal lines.

A wireless transmission system includes: a communication unit for transmission; and a communication unit for reception. The communication units for transmission and reception are housed in a housing of the same electronic apparatus, or the communication unit for transmission is housed in a housing of first electronic apparatus and the communication unit for reception is housed in a housing of second electronic apparatus and a wireless signal transmission path enabling wireless information transmission between the communication units is formed between the communication units when the first and the second electronic apparatus are disposed at given positions to be integrated with each other. The communication unit for transmission includes a first carrier signal generating unit and a first frequency converter, and the communication unit for reception includes a second carrier signal generating unit, and a second frequency converter.

A system and method for powering a light-emitting element in an illumination device includes a DC power supply with the light-emitting element coupled across a positive output terminal and a negative output terminal of the DC power supply. A switching element is coupled between the light-emitting element and the negative output terminal. An average current value across the light-emitting element is measured each time the switching element is turned on. A control circuit generates a PWM signal having a pulse width determined based on the calculated average current value and a predetermined target value, and applies the PWM signal to drive the switching element on and off in accordance with the determined pulse width, and a current is generated across the light-emitting element.

A cylinder driving system capable of reducing the number of hydraulic devices and the amount of energy loss and an energy regenerating method thereof are provided. To this end, the system includes i) a hydraulic cylinder, ii) a hydraulic pump having three suction / discharge ports of a first port for supplying oil to a bottom chamber of the hydraulic cylinder or draining oil from the bottom chamber, a second port for draining oil from a head chamber of the hydraulic cylinder or supplying oil to the head chamber, and a third port for draining oil from a tank or supplying oil to the tank, the suction rate or the discharge rate in the first port being the sum of the respective discharge rates or suction rates in the second port and the third port, and iii) a driving source for driving the hydraulic pump.

A switching power supply circuit is disclosed which can achieve a high power conversion efficiency and besides achieve reduction of the circuit scale and the cost by simplification in circuit configuration. The switching power supply circuit includes a synchronous rectification circuit of the winding voltage detection system on the secondary side of a resonance converter. The coupling coefficient of an insulating converter transformer or the induced voltage level per one turn of the secondary winding is set so that the magnetic flux density of the insulating converter transformer may be lower than a fixed level thereby to maintain the secondary side rectification current in a continuous mode even in a heavy load condition. An inductor is inserted in series in a path along which rectification current is to be supplied to a secondary side smoothing capacitor so that reverse current appearing on the rectification current is suppressed by counter electromotive force generated in the inductor to further reduce the reactive power. A dc superposition characteristic of the inductor is set so that abnormal oscillation in a very light load condition (for example, 12.5 W or less) is prevented.

A battery protective device that protects against battery damage and semiconductor destruction from overdischarge and overcharge of the battery. Resistance across switching elements is controllable to prevent current leakage through parasitic dipole elements in the integrated circuit. Current is detected with an overdischarge detecting circuit and an overcharge detecting circuit. Direction of the current to / from the battery is detected by discharge overcurrent and charge overcurrent detecting circuits. Switching discharge FETs and charge FETs are enabled as independently controlled, ON-OFF parallel switching elements, interposed in series in the charge / discharge current path of the battery. Only a part of the discharge or charge switching FETs can be turned ON and OFF for accurate current control in accordance with the detected current and its direction.

A pulse modulated signal (ei) output from a pulse modulator (1) and a feedback signal (ef) containing distortion caused by a power switch (3) are integrated in a first integrator (21) and a second integrator (24), respectively, and are input to input terminals of a comparator (25 or 29), respectively, so that a correction signal (Vc) is generated.

A semiconductor circuit including: an A / D converter circuit which converts an inputted first signal into a second signal. The A / D converter circuit includes a comparator circuit which compares a voltage of the first signal and a reference voltage; an A / D conversion controller circuit which outputs a digital signal in accordance with comparison results given by the comparator circuit, as a fourth signal and which outputs, in accordance with the third signal, a digital signal corresponding to the first signal, as the second signal; and a D / A converter which converts an inputted fourth signal into an analog signal and which outputs the analog signal as the reference signal. The comparator circuit includes a transistor having a first gate and a second gate. The first signal is inputted to the first gate, the reference signal is inputted to the second gate.

A copy-protected-state indicating MPEG-TS data output unit (3) holds a bit stream obtained by previously compressing and encoding image and / or audio data representing that recording desired by the user has ended in failure because the contents is copy-protected. When copy control information (V2) outputted from an IEEE 1394 interface (1) indicates a copy-protected state, a selecting unit (20) selects copy-protected-state indicating MPEG-TS data (V3) outputted from the copy-protected-state indicating MPEG-TS data output unit (3) and outputs it as to-be-recorded MPEG-TS data (V4). Thereby, the data (V3) is recorded.

A display device includes a display panel having pixels arranged in a matrix form, a driving circuit for outputting an analog voltage according to a video signal to the pixels through signal lines, a plurality of measuring circuits each for detecting the amount of transmitted light, a single totalizing circuit for totalizing the results of measurements made by the measuring circuits, and a control circuit for adjusting a potential on a common electrode of the display panel in accordance with the result of the totalization from the totalizing circuit. The results of measurements made by the plurality of measuring circuits are totalized by the single totalizing circuit.