218results about How to "Low noise" patented technology

High dynamic range brightness information is acquired by inputting detection current to a high (adjustable) gain resettable integrator whose output V(t) is compared to a Vth threshold by a comparator whose output is counted by a reset counter as V(t).gtoreq.Vth. When a desired count is attained, data acquisition ends, the counter is read, and the entire circuit is reset. A TOF data acquisition circuit includes first and second sequences of series-coupled delay units, and a like number of latch units coupled between respective delay units. A phase discriminator compares output from each chain and feedback a signal to one of the chains and to a comparator and can equalize delay through each chain. A control voltage is coupled to the remaining chain to affect through-propagation delay time. The latch units can capture the precise time when V(t).gtoreq.Vth. Successive measurement approximation can enhance TOF resolution.

A low noise solid state thermostat is provided which includes a thermostat input operatively configured to be coupled to a temperature sensor; a comparator for comparing an output of the temperature sensor to a predefined setpoint temperature; and solid-state switching circuitry operatively coupled to the comparator for selectively switching current to a thermostat output based on the comparison by the comparator, wherein the comparator comprises a microprocessor for comparing the output of the temperature sensor to the predefined setpoint temperature, the predefined setpoint temperature being programmed into a memory accessible by the microprocessor.

A system and method for converting a non-cognitive radio into a cognitive radio is presented. A cognitive radio system includes, a non-cognitive radio; an electronic device, a spectrum sensing logic and configuration and management logic. The electronic device is connected to the non-cognitive radio so that it receives and/or transmits messages to/from a wireless network. The configuration and management logic is connected between the non-cognitive radio and the spectrum sensing logic. The spectrum sensing logic and the configuration and management logic are removable from the non-cognitive radio allowing the cognitive radio to operate in a non-cognitive mode. The spectrum sensing logic senses a wireless environment to determine available frequencies and available channels. The configuration and management logic transmits available frequencies, available channels or other spectrum data to a remote spectrum manager that is managing access to the wireless network.

A solid-state image sensor of a charge sorting method used in a time-of-flight measurement method, in which noise derived from background light, which is caused by the reflection light from the subject derived from background light is eliminated, reflection light from the subject derived from a predetermined light source, which is previously set in the solid-state image sensor, is effectively extracted as a signal component to achieve high sensitivity and low noise, which is a solid-state image sensor that is equipped with a plurality of charge-storage sections, discriminates photoelectrons generated by incoming light on the incoming timing and sort to the above-described plurality of charge-storage sections, and measures the timing of the incoming light, in which the sensor has: a plurality of capacitors that capable of conducting to the plurality of charge-storage sections; and a control section that controls a conducted state between the above-described plurality of charge-storage sections and the above-described plurality of capacitors, in which by selectively conducting the above-described plurality of charge-storage sections and the above-described plurality of capacitors by the control of the above-described control section, the difference component of charge stored in the above-described plurality of charge-storage sections is extracted.

Within an antenna array 120, the magnitude and phase of a relationship resulting from propagation delay between a sample taken at a first antenna 1 to a sample taken at a second antenna 2 at a different time is employed to derive a data value for a virtual antenna 3. Sub-patch antennas 203 perturbed in elevation are employed to expand the elevation range of acceptable gain. Multiple arrays each providing a separate radio frequency output are employed with digital beamform steering to a single point, together with low noise amplification at the feed point, to achieve sufficient gain with an acceptable total array size. A modular implementation with fiber transport is preferably used.

A frequency agile voltage controlled oscillator is provided in which amplitude control is performed by digitally controlling the current supplied to the oscillator from a current source (10). The use of digital control means that phase noise performance of the oscillator is not degraded by the introduction of noise from the current source controller.

An automatic fire suppression system used to provide protection of window glass and other structural elements in aircraft terminals which are exposed to exterior fires caused by natural, accidental, or intentional events comprises a directional passive microwave receiver, a central processor for processing received microwave signals over time and comparing the received signals over time with thermal event signatures stored in memory to selectively actuate a sprinkler system for protecting the window glass in the vicinity of an identified fire event. The memory may further store a model of the aircraft terminal, and the processor utilizes a fire dynamics simulator to simulate a thermal event at the terminal. A related fire suppression process involves the detection of incipient fires through an array of exterior passive microwave heat sensor fire detectors connected to an electronic control processor which identify zones such as 30 to 100 linear foot zones of exterior glass surface and automatically initiates an array of quenching sprinkler heads applying water to the exposed surfaces of glass and other structural elements in response to detection of an identified fire event by its signature.

A dual mode radio frequency (RF) front end circuit includes a first transformer for conversion between a balanced and an unbalanced RF signal and a second transformer for conversion between a balanced and an unbalanced RF signal. A first switch is configured to selectively electrically connect to one of the first transformer, the second transformer and an RF transmit port. A second switch is configured to selectively electrically connect the first switch and a filter to one of the input and the output port of an amplifier. The first switch is connected to the input port of the amplifier when the filter is connected to the output port of the amplifier, and the first switch is connected to the output port of the amplifier when the filter is connected to the input Port of the amplifier. The first and the second switch cooperatively selectively connect one of the first transformer, the second transformer and the RF transmit port to the amplifier and the filter.

An amplifying circuit includes an n-type transistor having a source, a gate coupled to a first bias voltage, and a drain coupled to a first supply voltage through a first impedance circuit. A p-type transistor of the circuit has a source coupled to the source of the n-type transistor, a gate coupled to a second bias voltage, and a drain coupled to a second supply voltage through a second impedance circuit. A first differential input is coupled to the gate of the n-type transistor through a first capacitor and to the gate of the p-type transistor through a second capacitor. A second differential input is coupled to the sources of the n-type and the p-type transistors. A third capacitor has a first end coupled to the drain of the n-type transistor, and a fourth capacitor has a first end coupled to the drain of the p-type transistor and a second end coupled to a second end of the third capacitor. An output of the amplifier circuit is provided at the second ends of the third and the fourth capacitors. The n-type transistor and the first impedance circuit serve as a common-source amplifier for a signal at the first differential input and as a common-gate amplifier for the signal at the second differential input. Similarly, the p-type transistor and the second impedance circuit serve as a common-source amplifier for the signal at the first differential input and as a common-gate amplifier for the signal at the second differential input.

A system and method for encoding and/or decoding a signal, such as an audio signal, employing a reversible transform obtained via matrix lifting. This reversible transform not only converts integer input to integer output, but also reconstructs the exact input from the output. It is one of the key modules for lossless and progressive to lossless audio codecs. The system and method of the invention produces smaller quantization noise and better compression performance of lossless and progressive to lossless codecs previously known. A number of embodiments employing RMDCT solutions are described. Matrix lifting is used to implement a reversible fast Fourier transform (FFT) and a reversible fractional-shifted FFT, respectively, which are further combined with reversible rotations to form a RMDCT. A progressive-to-lossless embedded audio codec (PLEAC) employing RMDCT is implemented with superior results for both lossless and lossy audio compression.

A novel clothes dryer belongs to the technical field of textile drying equipment and comprises a casing, an inner drum, an air duct, a semiconductor refrigerator, a condenser and an evaporator, wherein the inner drum is communicated with the air duct through a communicating pipe assembly, both the condenser and the evaporator are disposed in the air duct, a hot end of the semiconductor refrigerator is connected with the condenser through a first heat exchange pipe, a cold end of the semiconductor refrigerator is connected with the evaporator through a second heat exchange pipe, a drive device which enables air to flow inside the communicating pipe assembly, the air duct and the inner drum is disposed on the communicating pipe assembly, and a dewatering pipe is disposed on the air duct in a communicated manner. Air in the novel clothes dryer is reusable, the clothes drying time is short, and energy consumption is low. Low operational temperature effectively protects clothes from damage. Exhausting the used air indoors is not needed, so that indoor environment is guaranteed effectively, noise and vibration are low, and control is convenient.

The invention belongs to the washing machine field, in particular to a wash bucket for a double-mode washing machine, comprising a water holding bucket, a rotary drum and a clutch, wherein, the rotary drum consists of an inner rotary drum and an outer rotary drum; horizontal rotary shafts of the inner rotary drum and the outer rotary drum are coaxial; a vertical rotary shaft is arranged on the bottom center of the inner rotary drum; a horizontal rotary shaft is arranged on a horizontal axis of rotation of the outer rotary drum; a bearing is arranged at the bottom of the outer rotary drum; the inner rotary drum is pivotally arranged inside the bearing at the bottom of the outer rotary drum through the vertical rotary shaft on the bottom center of the inner rotary drum and combined with the outer rotary drums; water-sealed bearings are arranged on the side face and the bottom part of the water holding bucket; the horizontal rotary shaft of the outer rotary drum is pivotally arranged inside the water-sealed bearing on the side face of the water holding bucket; the clutch passes through the water-sealed bearing at the bottom of the water holding bucket and connected with the vertical rotary shaft of the inner rotary drum which is arranged inside the inner rotary drum and extended out of the bottom part of the outer rotary drum. During the washing process, the inner rotary drum and the outer rotary drum simultaneously rotate along the horizontal rotary shaft on the outer rotary drum, thereby washing mode of a drum-type washing machine is realized; during the wringing process, the inner rotary drum rotates at high speed along a shaft which is perpendicular to the ground, thereby wringing of an impeller washing machine is realized.

A combustible gas detector which has low power consumption, low noise and high speed response and which enable miniaturization, a process for producing the combustible gas detector, and a fuel cell system equipped with a combustible gas detector are provided. The combustible gas detector for detecting a combustible gas includes a catalyst for reaction with the combustible gas, a first displacement unit including a flexible member which is displaced with catalytic combustion by the reaction of the catalyst with the combustible gas, and electrical contacts which are switched by the displacement of the flexible member in the first displacement unit.

The invention relates to a permanent magnet system used in rotary magnetic refrigerator, wherein, the stator comprises a hollow cylinder permanent magnet and a magnetic conductive polar shoe; the hollow cylinder magnet is assembled symmetry around the central axle of the section of magnet via even permanent magnets; the magnetic direction of permanent magnet is decided by Halbach rotation theory; the magnetic conductive polar shoes are formed by two metals with better magnetic conductivity, while one side face is engaged with the wall of the chamber of permanent magnet, while another side is arc; two magnetic conductive polar shoes are contacted on the wall of chamber at the center of N and S polarities, with 180 degree spatial difference. The rotor comprises a rotary axle, a magnetic conductive iron corn and a magnetic medium; the rotary is cylinder; the iron corn is made from magnetic conductive magnet, as the cylinder with central hole or with cut-off two edges, sheathing the rotary axle while the rotary axle is at the center; two magnetic mediums are mounted on two outer arc faces of magnetic conductive iron corn, while the spatial positions are 180 degree different. The invention can be used as rotational permanent magnetic device.

It is an object of the present invention to provide a photopolymer-based volume phase hologram recording material that can record/reproduce image information with excellent properties in terms of bit error rate (BER) or signal to noise ratio (SNR), which expresses the ratio of digital signal to noise, and that is suitable for application to holographic information recording, etc., and to provide a volume phase hologram recorded material employing the material. In accordance with the present invention, it is possible to record/reproduce a volume phase hologram with reduced noise, etc. in data hologram recording by a produced polymer that has been polymerized by means of interference fringes generated by interference between information light and reference light, the produced polymer having a weight-average molecular weight of 1,000 to 3,000,000. Furthermore, when a hologram is recorded using information light and reference light, the present invention provides a volume phase hologram recording material that comprises a chain transfer agent.

The invention discloses a flexible MEMS resistance-reducing skin and a manufacturing method thereof used for reducing skin friction resistance during the advancing of on-water or underwater vehicles, which employs micro-fine resident bubbles to reduce resistance and belongs to the fields of micro-machinery and fluid dynamics. The upper surface of the skin is a surface layer coated with micro-pit arrays and processed by surface soakage; electrolytic anodes and cathodes of comb-shaped micro-fine planar metal, which are attached on an insulating layer, are arranged at the bottom of the micro-pits; a flexible substrate is positioned below the insulating layer; wire leading terminals for electrodes are arranged on the lower surface of the skin; and both the surface layer and the substrate are made by flexible materials. The overall thickness of the resistance reducing skin is at sub-millimeter level, and the skin is in the status of flexible film. The manufacturing method is an MEMS micro machining technique compatible with the flexible MEMS technology. The flexible MEMS resistance-reducing skin is coated on the outer surfaces of the on-water or underwater vehicles, with power thereof supplied by the on-water or under-water vehicles. Micro-bubbles stably residing in the micro-pits are formed by water electrolysis reaction to coat most parts of the surfaces of the on-water or under-water vehicles, thus realizing the function of reducing skin friction resistance.

The invention discloses a numerical control precision micro-fine super-long deep hole drilling machine which comprises a workbench, a master control cabinet, a linear motor and a servo motor. An output shaft of the servo motor is provided with a drilling bit. The linear motor comprises a primary part installed on the master control cabinet and a secondary part where the servo motor is installed. The secondary part drives the servo motor to move so as to enable the drilling bit to stretch out or retract back above the workbench. The workbench comprises a lifting base and a workbench top arranged on the lifting base. A clamp for fixing a workpiece is installed on the workbench top. According to the numerical control precision micro-fine super-long deep hole drilling machine, the linear motor is used as a feeding power source of the drilling bit, intermediate transmission links such as a gear, a worm gear pair, a belt, a lead screw pair, a coupler and a clutch which are needed in an existing transmission chain from a motor used as a power source to a working component are abandoned, and rotational inertia, elastic deformation, a backlash, motion hysteresis, friction, vibration, noise and abrasion of the intermediate transmission links are avoided; the numerical control precision micro-fine super-long deep hole drilling machine is high in degree of automation, easy to operate, high in control precision, stable in motion, low in noise, long in service life, safe and reliable.

The invention relates to a constant-temperature constant-humidity box for electrostatic spinning and a method for realizing constant temperature and constant humidity. The box comprises a work chamber, a processing chamber, and a refrigeration and dehumidifying apparatus, wherein the work chamber, the processing chamber, and the refrigeration dehumidifying apparatus are arranged in the box body. A circulating air duct is arranged in the work chamber; and an inlet and an outlet of the circulating air duct are connected with the processing chamber. The refrigeration and dehumidifying apparatus includes semiconductor refrigeration plates; and a refrigeration end of each semiconductor refrigeration plate is arranged in the circulating air duct. And an exhaust fan is arranged at the inlet of the circulating air duct. According to the invention, the semiconductor refrigeration plates are used for carrying out cooling and dehumidification on recirculating air; and the recirculating air is recycled continuously in the processing chamber and the work chamber under active suction of the exhaust fan and the effect of the circulating air duct, thereby controlling the humidity and temperature in the processing chamber. Because vibration and noises of the exhaust fan and the semiconductor refrigeration plates are low, the provided constant-temperature constant-humidity box is especially suitable for precise electrostatic spinning. The box and method can be applied to temperature and humidity control of electrostatic spinning.

Disclosed are an auxiliary washing machine and a clothes treatment apparatus using the same. The clothe treatment apparatus includes a main washing machine configured to treat laundry and an auxiliary washing machine located at one side of the main washing machine. The auxiliary washing machine includes a frame defining an accommodation space, a drawer configured to be accommodated in the accommodation space, the drawer defining a space for storage of wash water, a rotating structure placed within the drawer, the rotating structure having a rotating shaft penetrating the drawer so as to treat laundry, a suspension assembly configured to support vertical load of the rotating structure such that the rotating structure is supported to float with respect to the drawer and to alleviate horizontal vibration of the rotating structure, and a front panel located in front of the drawer, the front panel defining a front external appearance of the auxiliary washing machine.

The invention relates to a household miniature oil press, which comprises an electric device and an oil pressing device, wherein the electric device is provided with a motor and a reduction box. The motor transmits power to the reduction box through a transmission belt and a transmission wheel, and then the power is transmitted to the oil pressing device after deceleration by the aid of the reduction box. The oil pressing device is provided with a feeding cylinder, a variable-section spiral propulsion shaft and an oil pressing cylinder, wherein the oil pressing cylinder is fastened onto the feeding cylinder, the variable-section spiral propulsion shaft is mounted in the feeding cylinder and the oil pressing cylinder, and a connecting shaft at the front end of the variable-section spiral propulsion shaft is connected with an output shaft of the reduction box. Compared with the prior art, the household miniature oil press has the advantages that materials do not need to be fried, the household miniature oil press is small in size, simple and convenient in operation, high in oil yield, stable and reliable in operation and low in noise and vibration, electricity is saved, the rotating thrust of the miniature high-speed motor is used for replacing partial pressing force, and torque force needed by pressing is easily realized.

A scroll-type spiral fluid displacement machine having at least one pair of interfitting scroll elements. The scroll vanes of the scroll elements are constructed upon a base line spiral defined by the equation:

L=K₀φ^K1e^{−φ/<sub2>K2 </sub2>}

where L is the distance from the spiral's origin to any point on the spiral curve, φ is the angular displacement of the spiral, K₀ is a constant greater than 1, K₁, is a constant greater than 1, and K₂ is a constant greater than 10.

A phototransistor (400) comprises an emitter (43) comprising antimony, a base (42) comprising antimony, and a collector (41) comprising antimony. Preferably, the emitter, the base and the collector each comprises at least one of AlInGaAsSb, AlGaAsSb, AlGaSb, GaSb and InGaAsSb. The base comprises an emitter-contacting portion (41b) with a base-contacting portion (43a) of the emitter. The collector comprises a base-contacting portion (41b) which is in contact with a collector-contacting portion (421a) of the base. The phototransistor produces an internal gain upon being contacted with light within a receivable wavelength range, preferably greater than 1.7 micrometers. Also, a method of detecting light using such a phototransistor.

This invention relates to a low noise amplifier, used in radio frequency integrated circuit design, especially low noise amplifiers for ultra broad-band wireless communication, comprising at least a transistor of the core circuit of a low noise amplifier structure, a transformer that is implemented on the chip, in order to form a dual feedback amplifier, that is, an amplifier structure comprising an inductive feedback and a capacitive feedback, wherein the capacitive feedback is used for the low and medium frequency range, while the inductive feedback is used for the high frequency range. By assembling an amplifier circuit with these two feedback paths, it is possible to provide a broadband and good impedance matching at the signal input end of the circuit. The low noise amplifier circuit structure of the present invention is able to provide optimal conditions for broadband input impedance matching and broadband noise optimum; besides significantly increasing the gain and gain flatness, there are also huge improvements to the noise performance and the cost-down on fabrication, and the energy consumption can also be maintained at a very low level.

The invention relates to the field of metal pressure moulding and provides an overlarge type ring rolling machine which has large rolling force, good rigidity, high processing precision, high processing efficiency and low processing cost and can be suitable for the manufacturing requirement on a large cylindrical section. A stand of the overlarge type ring rolling machine comprises a drive side stand and an operating side stand which are longitudinally and oppositely arranged, both ends of each roll are supported, and axes are horizontally arranged; a drive roll is arranged at the lower part of the stand, and a core roll is positioned on the drive roll; at least one of double axial directions of the core roll is set to be a drawing direction of the core roll, one end of the core roll points to the other end along the drawing direction, the starting point end is a suspending end, and the terminal point end is a drawing end; a drawing unit comprises the core roll and a drawing end core roll bearing seat thereof or the core roll and core roll bearing seats at both ends of the core roll; the overlarge type ring rolling machine is provided with a roll drawing mechanism for doing reciprocating motion along the drawing direction of the core roll; and the roll drawing mechanism is provided with a detachable type fixing structure of the drawing unit. The invention is suitable for producing a large cylindrical section with large axial size, weight and wall thickness in the fields of large nuclear power, petrochemical container, aerospace, and the like.

In a refrigerating cycle incorporating a second flow controller having a throttle section, which is composed of an inlet noise eliminating space 19, an inlet side porous permeable member 20 communicating in a refrigerant flow direction, an orifice 23, an outlet side foamed metal 25, and an outlet noise eliminating space 27, and a multi-directional valve, a gas/liquid two-phase refrigerant is caused to pass through the throttle section.

A solid state image pickup element includes a pixel unit having a plurality of pixels for photoelectric conversion disposed in a matrix shape and a pixel signal read circuit for reading pixel signals in the unit of a plurality of pixels from the pixel unit. The pixel signal read circuit includes a plurality of comparators disposed in correspondence with a pixel column layout for performing comparison judgment between a read signal potential and a reference voltage and outputting a judgment signal and a plurality of counters each for counting a comparison time of a corresponding one of the comparators, an operation being controlled by an output from a corresponding one of the comparators. The comparators include a first amplifier for performing a comparison operation between the reference voltage and the read signal potential and inverting an output at a predetermined comparison point, a second amplifier for forming a current path when an output of the first amplifier is inverted, to output an output of the first amplifier by gain up, and a current control circuit for shutting the current path of the second amplifier when an output level of the second amplifier exceeds a predetermined threshold level.

Charge pump circuitry (1) includes a master charge pump (2) including a voltage multiplier (5) and charge pump (30) which operate to produce a boosted, unregulated voltage (Vunreg), and also includes a slave charge pump (3) including a voltage multiplier (36) and charge pump (50) which operate to produce a boosted control voltage (Vctl) which then is filtered. The boosted, unregulated voltage (Vunreg) is regulated in response to the filtered, boosted control voltage (Vctl) to produce a boosted, regulated, low-noise voltage (Vreg). The boosted control voltage (Vctl), relative to a reference voltage (Vref_SH), is controlled by feedback circuitry (61,62,65) in response to the boosted, regulated, low-noise voltage (Vreg).

The invention discloses an overhead single-track train system, which is a single-track train running between an upper and a lower auxiliary main single tracks and an overhead single-track system in which an upper and a lower rows of multiple tracks formed by two pairs of main auxiliary single tracks arranged on both sides of the same I-shaped beam. The single-track train is a light main auxiliary single-track train which consists of narrow train body with small cross section, a plate-shaped shock absorber, a main track wheel motor directly driving a main track wheel, an auxiliary wheel in parallel with the train and a small single main track wheel for bearing; the main structure of the overhead single track is a main bearing beam with I-shaped cross section, which consists of an I-shaped upper flange of girder, a horizontal lower flange and a middle vertical wall; both the upper and the lower flanges are structures with thick root and thin flange edge; the middle vertical wall is provided with a structure hole; the I-shaped beam of the upper flange is formed by an auxiliary track support arm, in which the main body is a reversed T-shaped main beam; the T-shaped beam structure is the same with a corresponding part of the entire I-shaped beam; the main single tracks are paved at the edge of the lower flange; the auxiliary single tracks are arranged on the edge of the upper flange or the top of the single-track support arm; both ends of the I-shaped beam are supported by a T-shaped pier; the invention is characterized by low cost, low energy consumption and low noise.

A radio frequency (RF) switch includes a plurality of series-connected silicon-on-insulator (SOI) CMOS transistors fabricated using a 0.13 micron (or larger) process, wherein the SOI CMOS transistors include nickel silicide formed on the source/drain regions. Each of the series-connected SOI CMOS transistors has a gate length of about 0.13 microns or more, thereby enabling these SOI CMOS transistors to handle high power RF signals, and exhibit the high breakdown voltages required to implement an RF switch. The nickel silicide regions advantageously contribute to a relatively a low on-resistance (R_ON) of the SOI CMOS transistors, while consuming a relatively small amount of the underlying silicon regions during their fabrication. The SOI CMOS transistors can be fabricated on a relatively thin silicon layer, thereby contributing to a relatively low off capacitance (C_OFF) of the SOI CMOS transistors. As a result, an R_ON*C_OFF value of the RF switch is advantageously minimized.

The present invention is a test system and test method based on white light interferometry, characterized in that the test system includes a microscopic optical system, a digital CCD camera, an image acquisition card, an interference system, piezoelectric ceramics, piezoelectric ceramics Controller, air floating platform, white light halogen light source and PC. The test method of the present invention controls the piezoelectric ceramics to drive the sample to be tested to scan vertically through the PC to operate the piezoelectric ceramic controller, so that the interference fringes are swept across the measured area, and the image collected is recorded by a digital CCD camera; After the image is filtered, the white light interference signal of a single pixel is extracted, the background light intensity value of the white light interference fringes obtained is subtracted, the light intensity of each pixel is converted from the time domain to the frequency domain, and decomposed in the frequency domain to obtain the wave number and The phase relationship; the position of zero optical path difference is obtained by integrating the wavenumber and phase information in the frequency domain of the interference signal, and the extraction of surface height information is realized.