69results about How to "Reduce noise output" patented technology

A pixel structure comprises a photo-sensitive element for generating charge in response to incident light. A first transfer gate is connected between the photo-sensitive element and a first charge conversion element. A second transfer gate is connected between the photo-sensitive element and a second charge conversion element. An output stage outputs a first value related to charge at the first charge conversion element and outputs a second value related to charge at the second charge conversion element. A controller controls operation of the pixel structures and causes a pixel structure. The controller causes the pixel structure to: acquire charges on the photo-sensitive element during an exposure period; transfer a first portion of the charges acquired during the exposure period from the photo-sensitive element to the first charge conversion element via the first transfer gate; and transfer a second portion of the charges acquired during the exposure period from the photo-sensitive element to the second charge conversion element via the second transfer gate.

A condenser microphone apparatus which is used for a radio apparatus in order to reduce noises generated due to radiation of a high frequency signal of a transmitting unit. A series resistor is provided between a bypass capacitor provided between a drain and a source of an FET and a microphone signal output transmission line in order to prevent a high frequency voltage from being increased due to a resonance of the bypass capacitor and microphone signal output transmission line. Thus, the noises due to the radiation of the high frequency signal can be reduced.

A feed gas drying system is described for a PSA or VPSA oxygen concentrator. A membrane dryer is inserted into the feed gas path to the concentrator absorbent beds, such that the moisture in the feed gas is directed to a part of the dryer exposed to the concentrator exhaust, thus achieving efficient operation of the membrane dryer with no loss of concentrator feed gas.

A personal audio device includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio. The noise is shaped by a noise shaping filter that has a response controlled in conformity with at least one parameter of the secondary path response.

A noise reduction circuit with high noise reduction effect and low power consumption for a high resolution charge coupled device (CCD) as well as for a usual resolution CCD is provided. A delay circuit delays an CCD output signal, and a pulse generator outputs a pulse signal having the same period that the CCD output signal has. A part of period during which the pulse signal is at a high level overlaps with a signal-level period oh the CCD output signal. A first non-additive mixing (NAM) circuit selects and output a lower level signal between the CCD output signal and the pulse signal. A second NAM circuit selects and outputs a lower level signal between the output signal from the delay circuit and the pulse signal. A difference circuit calculates difference between an output signal of the first NAM circuit and an output signal of the second NAM circuit. A delay time of the delay circuit is set so that a feedthrough-level period of an output signal of the delay circuit overlaps with a signal-level period of the CCD output signal.

A system for providing rechargeable energy onboard a marine vessel, the system including an energy storage device aboard a marine vessel, an interface device connected to the energy storage device configured to provide power to charge the energy storage device and / or provide power from the energy storage device to the marine vessel, a converter device connected to the interface device configured to convert power to alternating current and / or direct current, depending on an intended purpose of the system, and a conditioning device connected to the converter device, interface device, and / or energy storage device, and configured to establish an acceptable power level and / or an acceptable power waveform. The energy storage device is configured to provide power to the marine vessel to reduce fuel used, emission output, and / or mechanical noise output. A method for providing rechargeable energy onboard a marine vessel is further disclosed.

The present invention provides a method of measuring a physical quantity using a vibrator. The vibrator 14 has a plurality of driving vibration arms 16A, 16B, 16C and 16D, a plurality of detection vibration arms 20, films D1, D2, D3 and D4 for adjusting a weight provided on the driving vibration arms, respectively, and detecting means 8 and 9 provided on the detection vibration arms, respectively. A driving vibration is excited in the vibrator 14, and output signals are output from the detecting means based on a detection vibration excited in the vibrator responsive to the physical quantity. The weight of each of the films is adjusted based on a comparison of the output signals P1 and P2 from the detection vibration arms.

A pixel structure comprises a photo-sensitive element for generating charge in response to incident light. A first transfer gate is connected between the photo-sensitive element and a first charge conversion element. A second transfer gate is connected between the photo-sensitive element and a second charge conversion element. An output stage outputs a first value related to charge at the first charge conversion element and outputs a second value related to charge at the second charge conversion element. A controller controls operation of the pixel structures and causes a pixel structure. The controller causes the pixel structure to: acquire charges on the photo-sensitive element during an exposure period; transfer a first portion of the charges acquired during the exposure period from the photo-sensitive element to the first charge conversion element via the first transfer gate; and transfer a second portion of the charges acquired during the exposure period from the photo-sensitive element to the second charge conversion element via the second transfer gate.

A method and apparatus for reducing the acoustic output of a computer disk drive during a load or unload operation are provided. According to the invention, a pulse train having pulse widths that vary from one pulse to the next is provided to a voice coil motor while the transducer head is being loaded to or unloaded from the surface of the disk. According to one embodiment of the present invention, a proportional term equal to the inverse of the pulse width is supplied to the controller such that, with all other inputs to the controller being equal, a pulse train having pulses of equal total power are produced. By providing pulses of varying widths, the acoustic output of the disk drive is spread among multiple frequencies, and the amplitude at any one frequency is diminished as compared to a pulse train having pulses of equal width.

A rotary engine (1) is characterised by a driven output shaft (30) powered by internal combustion carried out in a cylinder (26) to drive a piston (50) and crankshafts (70, 80) carrying contra-rotating drive gears (10, 12) meshing with a fixed gear ring (88), rotation of the gears (10, 12) transmitting rotary motion to the piston (50) and the cylinder (26), the gear cage base (32), gears (10, 12) and to the output shaft (30). The contra-rotation of the gears (10, 12) on the respective crankshaft (70, 80) provides for a balanced power transmission.

In a force sensor chip, a base member, to which an external force is applied, includes: an operating part provided in a central portion of the base member and having an external-force acting area section; a supporting part provided, in an outer peripheral portion of the base member, for supporting the operating part; an intermediate part provided between the operating part and the supporting part; a first connecting arm section connecting the operating part and the intermediate section; a second connecting arm section connecting the intermediate part and the supporting part; and at least one strain resistance element provided on each of respective deformation-generating portions of the first and the second connecting arm sections.

The invention belongs to the field of environment monitoring, and provides a gas monitoring instrument and system. The gas monitoring instrument comprises a base, a front gas chamber and a main gas chamber are arranged on the base, a buffer plate is arranged between the front gas chamber and the main gas chamber, through holes are distributed in the buffer plate, the head end of the front gas chamber is provided with a funnel-shaped gas inlet, the tail end of the main gas chamber is provided with a gas outlet, a guiding gutter is arranged between the gas outlet and the buffer plate, and the main gas chamber is provided with a gas sensor. Joule-Thomson effect is utilized to cool the gas, thus the water in gas can be conveniently removed without any drying agent, and the phenomenon that water is condensed on the surface of the gas sensor is avoided. Moreover, the front gas chamber is arranged before the main gas chamber so as to provide a buffer, which can absorb the gas flow impact brought by the air pump and reduce the noise of the sensor. The gas sensor can be directly soaked in the gas to be detected, the contact route is the shortest, and the responding speed of the monitoring instrument is greatly improved.

This invention provides a common mode noise cancellation circuit for the unbalanced signals. The unbalanced signals come from a signal source with a first signal terminal and a second signal terminal having a first grounding potential. The common mode noise cancellation circuit comprises a grounding terminal and a subtractor. The grounding terminal with a second grounding potential is electrically coupled to the second signal terminal of the signal source through an impedance unit. The subtractor comprises a first receiving terminal, a second receiving terminal and a signal output terminal. The first receiving terminal and the second receiving terminal are electrically coupled to the first signal terminal and the second signal terminal respectively for receiving the unbalanced signals. The subtractor subtracts the noise coming from the first receiving terminal and the noise coming from the second receiving terminal to reduce the output noise of the signal output terminal.

Systems and methods are provided for a bladeless radiator cooling fan. In one example, a system may include a plurality of bladeless entrainment discs surrounded by a shroud, each bladeless entrainment disc including a hollow central opening that enables unrestricted ambient airflow through the cooling fan, and a source fan for providing airflow to the bladeless entrainment that is encased by a housing. In this way, airflow through the bladeless radiator cooling fan may be increased, decreasing powered fan usage and decreasing fan noise.

A fuel pump having a housing defining a pump chamber and an inlet and outlet fluidly connected to the pump chamber. A one way check valve is disposed fluidly in series between the pump chamber and the outlet and is oriented to allow fluid flow from the pump chamber and to the outlet when the check valve is open. A venturi tube is fluidly connected in series between the pump chamber and the outlet which effectively dampens noise pulsations. An inlet valve to the pump chamber has an anchor attached to a valve member and the stationary core. A conical surface on the core abuts against a complementary conical surface on the anchor when the valve is either in its fully open or fully closed position.

The present disclosure relates to a low noise, compact rotary compressor configured to damp noise and vibration generated from internal components. The compressor may include a stator holder coupled to the stator and the pump, providing physical separation between the stator and the casing. The compressor may also include a pump holder coupled to the pump and the casing, providing physical separation between the pump and the casing. Additional damping components may be placed at various coupling points within and around the stator holder and / or pump holder. The suction line connection may also be configured to reduce noise and vibration. Aspects of the present disclosure may be applicable for reducing the noise and vibration in a number of fluid displacement devices and BLDC motors.

An image distortion compensating apparatus controls a convergence yoke, and includes a compensation value generator for calculating a convergence compensation value for compensating a convergence distortion which occurs while an image signal is emitted onto a display apparatus, the compensation value generator outputting the convergence compensation value after compensating for a phase and a gain of the convergence yoke; an amplifier for D-class amplifying of the convergence compensation value; and a convergence yoke attached to the display apparatus for controlling a path of electron beams corresponding to the image signal, based on the convergence compensation value as amplified at the amplifier. In the image distortion compensating apparatus used for the image display apparatus such as projection television, there is provided a D-class amplifier with high power efficiency and low heat generation, while through the two-pole and one-zero controlling, the switching delay and noise of the D-class amplifier is greatly reduced.

A centrifugal fan assembly including a housing having a lower surface and a parallel inlet wall that defines an inlet opening. A shaft is supported by the housing for rotating about an axis. A plurality of fan blades are disposed about the shaft and extend radially from the axis for drawing air axially into the fan blades and blowing air radially outwardly. The housing defines a scroll wall that spirals about the axis and defines an outlet air passage that extends substantially tangentially to the axis. The fan blades include extensions that extend through the inlet opening and outside of the inlet wall.

A personal audio device includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio. The noise is shaped by a noise shaping filter that has a response controlled in conformity with at least one parameter of the secondary path response.

A system for generating electrical power for an individual property (10) comprises a wind powered electricity generator (16) mounted on that property and arranged so that the electrical power generated be used in that property in preference to or to supplement electrical power provided by the national grid or other general electrical energy source.

A system and method receive the output signal from a capacitance diaphragm gauge (CDG) and generate a noise reduced output signal. An input signal processing circuit receives an input signal from a signal source that drives the CDG. The input signal processing circuit generates a segment of N normalized digital samples of the input signal. An output signal processing circuit receives the output signal from the CDG and generates M segments of N digital samples of the CDG output signal and averages the corresponding samples in the M segments to generate a signal segment of N averaged samples. Each of the N averaged samples is multiplied by a corresponding one of the N normalized samples to generate N products. The N products are averaged to generate an average product, which is multiplied by a constant to generate a system output signal with reduced noise.

A pressure assisted toilet flush cartridge that reduces noise output by controlling water flow. One aspect of the noise reduction is to reduce the initial discharge increase in flow rate. Another aspect is to create a vortex in discharge water to reduce cavitation and quiet the discharged water flow through the bowl.

The invention discloses a large-rolling-moment small-lateral-force scale, belongs to the technical field of wind tunnel experiments and aims to solve the problem that existing scales are difficult inmeeting experiment requirements in high-speed wind tunnels when the scales are large in rolling moment and small in lateral force. The scale comprises a front transition section, a front measuring beam, an axial force measuring element, a rear measuring beam and a rear transition section, and the axial force measuring element comprises a middle first transition section, an axial force front supporting beam group, an axial force measuring beam, an axial force rear supporting beam group and a middle second transition section. Through brand-new design of scale elements, the scale meets requirements on experiment safety, lateral component has reasonable sensitivity, interference on output of the lateral component by rolling moment component Mx is reduced, and lateral component measuring accuracy of the scale is improved. The scale is ingenious in concept and reasonable in design and has high application value and good application prospect.

An optical device has a first medium that produces more photons that exit the first medium than enter the first medium, such as a gain material. A second medium that produces light of a different wavelength than the wavelength of light incident thereon, such as a second harmonic generator. The optical device defines a cavity including the first medium and the second medium. An energy source provides energy to at least one of the first medium and the second medium so that light exits the cavity, the energy source is modified in a number of different manners such that the optical device has decreased noise output.