138results about How to "Short rise time" patented technology

A vertically stacked DFH design in a read / write head is disclosed that allows independent control of write gap protrusion and read gap protrusion. A first heater is formed in an insulation layer proximate to a sensor in a read head. A second heater is formed in a second insulation layer proximate to the write pole tip in a main pole layer. The two heaters are connected in series or in parallel through leads to a power source that activates the heaters. In one embodiment, the heaters have a fixed resistance ratio. Preferably, there are two drivers in the power source so that a first power can be applied to the first heater and a second power can be applied to the second heater to enable an adjustment of reader protrusion / writer protrusion or gamma ratio. Fast reader and writer actuation is achieved and low power consumption is realized.

It is an object to suppress deterioration in characteristics of a transistor in a driver cricuit. A driver circuit includes a first transistor, a second transistor including a gate and one of a source and a drain to which a second signal is inputted, a third transistor whose gate is electrically connected to one of a source and a drain of the first transistor and which controls whether a voltage state of an output signal is set or not by being turned on / off, and a fourth transistor whose gate is electrically connected to the other of the source and the drain of the second transistor and which controls whether a voltage state of an output signal is set or not by being turned on / off.

An object is to provide a signal processing circuit which can be manufactured without a complex manufacturing process and suppress power consumption. A storage element includes two logic elements (referred to as a first phase-inversion element and a second phase-inversion element) which invert a phase of an input signal and output the signal, a first selection transistor, and a second selection transistor. In the storage element, two pairs each having a transistor in which a channel is formed in an oxide semiconductor layer and a capacitor (a pair of a first transistor and a first capacitor, and a pair of a second transistor and a second capacitor) are provided. The storage element is used in a storage device such as a register or a cache memory included in a signal processing circuit.

A power delivery system for computed tomography includes at least one transformer (e.g., an isolation transformer, a coupling transformer, an adaptation transformer), a rotary transformer, and at least two power inverters. The rotary transformer includes a stationary winding disposed on a stationary side and a rotational winding disposed on a rotating side. The isolation or adaptation transformer is coupled to the stationary winding or the rotating winding of the rotary transformer. At least two power inverters are constructed and arranged to provide power to the primary winding of the rotary transformer. The high-voltage unit is disposed on the rotating side and connected to receive power from the rotational winding and constructed to provide power to an X-ray source.

A reception apparatus for OFDM signals having a short initial rise time since start of reception until outputting the sound and / or a picture. An OFDM reception apparatus 1 of the ISDB-T standard presets the TMCC information at the outset in a memory 19 in association with each broadcasting station. This TMCC information contains the information on the RF frequency and the guard interval length, time interleaving pattern information, the information on the carrier modulation scheme and the information on the code rate of the convolutional code. When a user selects a broadcasting station, a control circuit 18 reads out the TMCC information associated with the broadcasting station from the memory 19. The control circuit 18 affords the read-out TMCC information to each circuit to set e.g., the guard interval or the carrier modulation scheme.

An insulation resistance drop detector 50 and a method of detecting a state of malfunction of the detector 50 are provided. When open of a coupling capacitor Co or malfunction of a lowpass filter 53 is occurred, a time constant of the low pass filter 53 is decreased and a rising time of an output of the lowpass filter 53 against an output of a pulse signal P1 becomes shorter than that in a state of normal. Thereby, malfunction of the detector 50 can be detected based on the output of the filter 53 corresponding to change of frequency of the pulse signal P1.

A write driver circuit capable of controlling the waveform of overshoot of a write current, more specifically, controlling a rise, amplitude, and duration of overshoot (OS) in the waveform of an output current independently of one another. The write driver circuit includes transistors for controlling the rise, amplitude, and duration of OS, an impedance matching unit between the write driver and the load, and a canceller of reflection waves from the head.

A driver circuit and a method drive an electronic component such as a laser diode with a variable electric current that is controlledly switched between at least two discrete current levels. The driver circuit includes circuit elements that damp ringing or initial transient oscillations that arise when switching the current between the current levels. The driver circuit includes a current mirror having a mirror amplification factor dependent on the frequency of the variable electric current. In order to counteract parasitic capacitances and / or inductances leading to the ringing, an inductance and / or a resistance are connected between the two series circuits making up the current mirror, a capacitance is connected parallel to a reference resistor of one of the series circuits, and / or a capacitance is connected across the voltage supply.

A vertically stacked DFH design in a read / write head is disclosed that allows independent control of write gap protrusion and read gap protrusion. A first heater is formed in an insulation layer proximate to a sensor in a read head. A second heater is formed in a second insulation layer proximate to the write pole tip in a main pole layer. The two heaters are connected in series or in parallel through leads to a power source that activates the heaters. In one embodiment, the heaters have a fixed resistance ratio. Preferably, there are two drivers in the power source so that a first power can be applied to the first heater and a second power can be applied to the second heater to enable an adjustment of reader protrusion / writer protrusion or gamma ratio. Fast reader and writer actuation is achieved and low power consumption is realized.

An object is to provide a signal processing circuit which can be manufactured without a complex manufacturing process and suppress power consumption. A storage element includes two logic elements (referred to as a first phase-inversion element and a second phase-inversion element) which invert a phase of an input signal and output the signal, a first selection transistor, and a second selection transistor. In the storage element, two pairs each having a transistor in which a channel is formed in an oxide semiconductor layer and a capacitor (a pair of a first transistor and a first capacitor, and a pair of a second transistor and a second capacitor) are provided. The storage element is used in a storage device such as a register or a cache memory included in a signal processing circuit.

The invention discloses a minimum-duty-ratio semiconductor laser peak value optical power testing device and method, and the method comprises the steps that a high-speed photovoltaic conversion and pre-amplification module carries out the photovoltaic conversion of an optical signal of a high-speed laser pulse and the pre-amplification of a signal, thereby generating a high-speed electric pulse signal; the electric pulse signal is transmitted to a high-speed pulse optical maintaining and sampling module and a high-speed pulse frequency and widening testing module; the high-speed pulse optical maintaining and sampling module carries out the maintaining and sampling of the high-speed electric pulse signal, generates an integral maintaining signal, solves a pulse mean power, and transmits the pulse mean power to an FPGA controller; and the high-speed pulse frequency and widening testing module achieves the accurate measurement of frequency and pulse width of the high-speed electric pulse signal, and enables the measurement data to be transmitted to the FPGA controller. The method can achieve the detection of the peak value of a narrow pulse width pulse signal with shorter rise time and minimum duty ratio, and can achieve the instrumentation.

A CMOS current mirror is provided that includes a current input, an input transistor, whose conductivity path is located between the current input and a reference potential terminal, a current output, an output transistor, whose conductivity path is connected to the reference potential terminal and which supplies the current output with an output current, a gate node common for both transistors, and a supply potential terminal. The current mirror further includes a first additional transistor, whose conductivity path is located between the supply potential terminal and the gate node and whose gate terminal is connected to the current input, and a second additional transistor, whose conductivity path is located between the gate node and the reference potential terminal and whose gate terminal is connected to the gate node.

A piezoelectric transformer high-voltage power source apparatus, in which a driving voltage determined by a value of a driving frequency is applied to a piezoelectric transformer, and thereby an output voltage output by the piezoelectric transformer is provided to a load, includes: an output voltage detection unit to compare an output voltage with a reference voltage for controlling the output voltage, in order to maintain the output voltage at a predetermined value, and based on the comparison result, detecting the change of the output voltage as a digital value; and a driving control unit to perform driving control of the piezoelectric transformer according to the detected digital value. The high-voltage power source apparatus performs stable frequency control without falling into an abnormal oscillation or uncontrollable state, and a high-voltage can be output within a short rise time.

The present invention aims at providing a powder toner transferring method which fluidizes a powder toner with a gas supplied from an air supply means, sucks the fluidized powder toner with a suction means and transfers the powder toner by discharging the powder toner in a toner storage container, where the suction of the powder toner by means of the suction means is performed with a reciprocating-motion pump. The present invention also aims at providing a powder toner filling method that comprises the powder toner transferring process.

A driver circuit and a method drive an electronic component such as a laser diode with a variable electric current that is controlledly switched between at least two discrete current levels. The driver circuit includes circuit elements that damp ringing or initial transient oscillations that arise when switching the current between the current levels. The driver circuit includes a current mirror having a mirror amplification factor dependent on the frequency of the variable electric current. In order to counteract parasitic capacitances and / or inductances leading to the ringing, an inductance and / or a resistance are connected between the two series circuits making up the current mirror, a capacitance is connected parallel to a reference resistor of one of the series circuits, and / or a capacitance is connected across the voltage supply.

A simple constitution together with an easy calibration of output by realizing a fast light intensity detection method is realized without using the carrier signal.An optical sensor, including: a sensor to which light from a light source is lead, and by which light intensity of the light is modulated based on a physical value; light receiving elements 61 and 62 receiving two elements of divided light PA and PB having polarized waves which are orthogonally crossing each other; a variable optical attenuator operating light which is received by the light receiving elements 61 and 62; and a variable amplifier operating output signals from the light receiving elements 61 and 62, wherein both a zero point of a sensor output and sensitivity are calibrated based on a light attenuation factor or an amplification factor which is adjusted when a physical value is detected by calculating a ratio between a sum and a difference of outputs of the light receiving elements 61 and 62.

The invention discloses a CO2 supercritical extraction temperature fraction order PID control method. In the method, internal model control and fractional-order control are combined; a disadvantage that there are many controller setting parameters is overcome and performance of a control system is improved. Simultaneously, based on an OPC technology, a WinCC is used as a bridge so that MATLAB / Simulink and S7-200PLC can realize real-time communication. On the Simulink, real-time control can be performed on kettle temperature extraction through using a fraction order PID control algorithm. By using the method in the invention, accurate control of the temperature can be effectively realized so that application of intelligent control in an actual industrial control system is realized.

An optical wavelength conversion element includes a cesium-lithium-borate crystal processed into a 10-mm long optical element cut in an orientation that allows a fourth harmonic of a Nd:YAG laser to be generated. A transmittance (Ta) at 3589 cm−1 in an infrared transmission spectrum of the optical element is used as an index that indicates a content of water impurities in the crystal and is independent of a polarization direction. An actual measurement of the transmittance Ta is at least 1%, without taking into account loss at an optically polished surface of the crystal. A wavelength conversion device, a ultraviolet laser irradiation apparatus, a laser processing system, and a method of manufacturing an optical wavelength conversion element are also described.

The invention discloses a quickly loading booster cylinder and a high-flow safety valve test device using the same, which relate to the field of hydraulic bracket safety valves for mines and are invented for providing a practical test device for a high-flow safety valve. The quickly loading booster cylinder comprises a hydraulic cylinder (5), wherein an upper plunger (8) is arranged in the hydraulic cylinder (5) in a sliding manner; a lower plunger (9) is arranged in the upper plunger (8); a tested safety valve (1) is arranged at one end of the lower plunger (9); a liquid inlet (51) is formed in the cylinder wall of the hydraulic cylinder (5); and a control port (71) is formed at the cylinder bottom (7) of the hydraulic cylinder (5). The invention also discloses the high-flow safety valve test device. The quickly loading booster cylinder and the high-flow safety valve test device have short raising time of the output pressure and low resistance loss, are quickly started and are applied to the flow and dynamic performance test of the high-flow safety valve.

The invention provides an insulated gate type bipolar transistor. The said IGBT comprises a 1st semiconductor region of a 1st conductivity type, a 2nd semiconductor region of a 2nd conductivity type formed in one principal surface side of the 1st semiconductor region, a 3rd semiconductor region of the 1st conductivity type formed in the surface of the 2nd semiconductor region, a 4th semiconductor region of the 1st conductivity type formed in the principal surface side of another side of said 1st semiconductor region with a predetermined distance, a 5th semiconductor region of the 2nd conductivity type formed in the surface in the 4th semiconductor region, a gate electrode formed in said 2nd semiconductor region via an insulator layer, a collector electrode formed in the principal surface side of another side of said 1st semiconductor. The 1st semiconductor region, the 4th semiconductor region, and said 5th semiconductor region are exposed to the principal surface of another side of said semiconductor substrate and each has joined to a collector electrode.

A plasma knock-on effect thruster is a propulsion motor without consuming propelling medium. Because of not requiring the consumption of too much fuel, the thruster can make the spacecraft have more spaces to load the payload suitable for the attitude control of the spacecraft or a long-distance, long-time space navigation. The principle of the invention is that: by the action of the induced electric field the plasma is made to accelerate and knock on the member fixed with the spacecraft together, so as to change the momentum of the spacecraft. The plasma as the propelling medium can be used cyclical and the needed energy is only the electric energy.

A plurality of subresonators (12, 14), having different design configurations, share a common resonator section (18) such that the lasing action can be substantially synchronized to provide coherent laser pulses that merge the different respective pulse energy profile and / or pulse width characteristics imparted by the configurations of the subresonators (12, 14). The subresonators (12, 14) may share a laser medium (42) in the common section, or each distinct subresonator section (28, 36) may have its own laser medium (42). Exemplary long and short subresonators (12, 14) generate specially tailored laser pulses having a short rise time and a long pulse width at one wavelength or two different wavelengths that may be beneficial for a variety of laser and micromachining applications including memory link processing.

The invention discloses a fractional order PID control method for an electrostatic dust collection power source. The phase angle and gain of an open-loop system are obtained in combination with a transfer function of the high-frequency electrostatic dust collection power source and a transfer function of the fractional order PID control method; a margin relation is used for obtaining a KP, a KI and a KD of a fractional order PID control system; furthermore, multiple sets of KPs, KI s and KDs are obtained according to different differential integral orders; according to a time domain expression, the output quantity of a fractional order PID controller is obtained through calculation; according to an ITAE measurement criterion, system output error values of different sets of data are obtained; one set of data is adopted as setting parameters when an ITAE value is minimum; in combination with the linear relation between the output quantity of the PID controller and IGBT driving frequency, driving frequency for reasonably controlling an IGBT is obtained. Fractional order PPID parameters can be accurately set, so that ideal control over the high-frequency electrostatic dust collection system is achieved; a floating-point type DSP is adopted for efficiently processing fractional order calculus calculation; the fractional order PID control method has the advantages of being short in rise time, small in steady-state error, high in robustness, wide in application range and the like.

A display device that is configured to include two independent shift registers and is capable of performing a monitoring process without causing the degradation of display quality or the occurrence of abnormal operation is implemented. In a display device including: a writing control shift register composed of a plurality of first unit circuits (30) each including a first boost circuit (320) and a first output node reset circuit (330); and a monitoring control shift register composed of a plurality of second unit circuits (40) each including a second boost circuit (420) and a second output node reset circuit (430), current drive capability of the first boost circuit (320) is higher than current drive capability of the second boost circuit (420), and current drive capability of the second output node reset circuit (430) is higher than current drive capability of the first output node reset circuit (330).

The invention relates to a compressive resistance high frequency dynamic low pressure sensor that is made up of compressive resistance sensitive component, sensor base, repeater circuit and leading out cable. The compressive resistance sensitive component includes silicon compressive resistance sensitive component and glass circle sheet. The compressive resistance sensitive component has force sensitive area C or E type flat silicon sheet that is covered Si3N4 and SiO2 layer on positive surface. The force sensitive positive area has electrode and the negative area has Si3N4 and SiO2 layer and jointing on glass circle sheet. The leading out cable is jointed to repeater circuit. High frequency bandwidth amplifying circuit is set between the repeater circuit and the leading out cable to realize high frequency amplifying.

An image forming apparatus (1) is disclosed, including: a fixing unit (5); a main power supply (6) that provides a portion of the heaters with voltage; and a secondary power supply (711, 712) that provides another portion of the heaters connected to the portion of the heaters in parallel with power provided by the main power supply. The secondary power supply is disposed below and in the neighborhood of the fixing unit. An electric double layer capacitor (711) of the secondary power supply may be disposed between a side face of a chassis of the image forming apparatus and a thermally insulting wall (713) towards the fixing unit, or at an exterior of the chassis of the image forming apparatus on the side face of the chassis. The secondary power supply thus will not be heated by the fixing unit.

The assembly of an electrodynamic fractionating unit, for the fragmentation, milling or suspension of a brittle, mineral process material is disclosed. The energy store including the output switch / spark gap thereof, the electrodes including the supply line and the reaction vessel are each arranged at least within the protection of the electrically necessary insulating separation of regions of differing electrical potential, completely enclosed in a volume of the encapsulation, having electrically-conducting walls. The wall thickness of the encapsulation is at least equivalent to the penetration depth, corresponding to the lowest components of the Fourier spectrum of the pulsed electromagnetic field. The electrode at reference potential is connected to the ground side of the energy store through the encapsulation wall. The electrode at high voltage is connected by the shortest path to the output switch on the energy store.

A magnetic recording and reading device having a transfer rate of not less than 50 MB / s includes a magnetic recording medium having an absolute value of normalized noise coefficient per recording density of not more than 2.5×10−8 (μVrms)(inch) (μm)0.5 / (μVpp), and magnetic head which is mounted on an integrated circuit suspension so that a total inductance is reduced to be not more than 65nH and having a magnetic core which is not more than 35 μm of length, wherein a part of the magnetic core being formed by a magnetic film having a resistivity exceeding at least 50 μΩcm or by a multilayer film consisting of a magnetic film and an insulating film. The device also includes a fast R / W-IC having a line width of not more than 0.35 μm which is installed in a position within 2 cm from a rear end of the magnetic head.