113results about How to "Limit amplitude" patented technology

The wireless earpiece comprises two bodies (1, 2) articulated one about the other, one of which bears a speaker for fitting into the ear of the user. The other body (2) wraps around the outer part of this ear to hold the earpiece in the use position. A metal return spring (7) is wound around the hinge pin (5) of the two bodies (1, 2) to return the latter toward one another, when at rest, while clamping the user's ear which allows the earpiece to be held in position. The earpiece allows quick fitting and effective hold in this position.

A latent or “invisible ink” security marking formulation is provided using a phosphor with distinct emissions characteristics including visible emission due to excitation at a particular invisible wavelength. An insoluble inorganic phosphor with this or a similarly distinct emission characteristic is milled to a small particle size, preferably less than one micron particle diameter, and is combined with a carrier at very low pigment concentration, for example one percent by weight of the ink formulation. Preferably the pigment is cropped to resin particles in a binder. This ink formulation is diluted by a volatile solvent and applied using a conventional inkjet printer of the type used to mark codes on packages and labels. To test for security purposes the printing is irradiated and a response according to the predetermined characteristic is noted (or not noted) to detect security information. The marking is not immediately apparent and without knowledge of the specific phosphor used is difficult for a counterfeiter to reproduce.

A magnetic circuit component having a plurality of claws arranged in a plurality of rows, with the base of each claw connected to a common yoke. A plurality of non-interlaced coils constituting a multi-phase winding are included, with the coils being wound around the bases of corresponding claws, and being distributed uniformly in the direction of motion.

The pulse modulated RF power control method includes an output amplitude control step for controlling amplitude of a pulse output, and a duty control step for controlling a duty ratio of the pulse output. The output amplitude control step performs a constant amplitude control to control an amplitude value of the pulse output so that the amplitude value becomes equal to a set amplitude value. The constant amplitude control according to the output amplitude control, for instance, gives a feedback of the amplitude value of the pulse output outputted by the power control, obtains a difference value between the feedback value and the set amplitude value, and controls the amplitude value of the pulse output so that the difference value becomes zero.

The invention provides a display panel 9; a gain variable liquid crystal driving circuit 10 for driving the display panel 9 with an amplified video signal that is obtained by multiplying an input video signal by a variable coefficient; a backlight operating circuit 6 for operating, based on a lamp control signal, a backlight 8 for illuminating the display panel 9; a level extension signal calculating circuit 11 for outputting an optical output level extension signal Lout by extending a predetermined output level used to operate the backlight 8, wherein the predetermined output level is extended based on an optical output gain obtained from the input video signal, and an output peak value of the backlight 8; and a white peak improving circuit 5 for receiving the optical output level extension signal, and for outputting a lamp control signal, whose white peak level has been adjusted according to a change in brightness of a scene, to the backlight operating circuit 6, and for calculating and outputting a video amplitude gain, which adjusts an amplitude of a video signal, as a coefficient to a gain variable driving amplifier circuit 3, wherein the lamp control signal is outputted when the brightness of a scene is above normal level, and the video amplitude gain is outputted when the brightness is at normal level. As a result, there is provided a display apparatus that improves peak luminance in a bright scene and suppresses pale black display in a dark scene and thereby provide a wide dynamic range without increasing power consumption.

A method and apparatus for heating fluids using the Earth's inner heat to generate power and desalinate water. Fluids include fresh water and sea water to be desalinized. The method involves passing a filtered fluid down a channel formed by two concentric tubes in a deep well defining inner and outer channels, to a depth at which the fluid reaches the needed temperature. Hot fluids pass into an inner channel and flow to surface with small heat loss, through an insulated pipe. The hot fluid may be vaporized to produce power, and returned to the system when condensed, forming a closed system, or it may be desalinize seawater in an integrated process that also produces electrical power.

A peak limiter for use in a system for amplifying a multi-carrier signal receives a baseband signal of each carrier of the multi-carrier signal. The multi-carrier signal is computationally estimated to have carriers combined in an RF band, and obtains power information of the multi-carrier signal to limit an amplitude of the baseband signal based on the power information of the estimated multi-carrier signal to thereby provide peak-limited baseband signals. Thus, the distortion generated by performing the unnecessary peak limitation can be effectively prevented to thereby improve the reliability of the entire system.

The semiconductor laser has a resonance cavity composed of a gain chip, a Mach-Zehnder wide tuning port, and a wavelength-selective mirror component formed either as a ring resonator or a reflective Fabry-Perot etalon. Optical signals generated by the gain chip propagate through the wide tuning port and into the wavelength-selective mirror component and are then reflected back to the gain chip. The wavelength-selective mirror component is configured to reflect only those optical signals having wavelengths within a set of sharp peaks so that the laser cavity resonates only within the sharp peaks. The wavelength-selective mirror component is heated to adjust internal dimensions to maintain one of the sharp peaks at a selected emission wavelength. As optical signals pass through the wide tuning port, the signals are split between two channels of differing lengths resulting in optical interference. The optical interference limits the ability of the laser cavity to resonate at wavelengths other than near the center of a single broad peak determined by the relative lengths of the two channels. The wide tuning port is heated to vary the relative lengths of the two channels to maintain the single broad peak at the selected transmission wavelength. In this manner, the laser cavity is controlled to resonate substantially only at the single selected wavelength. Resonance at any of the other wavelengths reflected by the wavelength-selective mirror component is greatly limited, thereby significantly reducing transmission sidebands generated by the laser. Specific implementations of the ring resonator mirror and the reflective etalon are described.

A system is described for improving engine and vehicle performance by considering the effects of exhaust conditions on catalyst particle growth. Specifically, engine operation is adjusted to reduce operating in such conditions, and a diagnostic routine is described for determining the effects of any operation that can cause such particle growth. Further, routines are described for controlling various vehicle conditions, such as deceleration fuel shut-off, to reduce effects of the particle growth on emission performance.

A level trasnforming circuit includes a first CMOS circuit, a first intermediate circuit, a second intermediate circuit, a second CMOS circuit, a seventh p-channel type MOS transistor, and an eighth p-channel type MOS transistor; wherein the first intermediate circuit and the second intermediate circuit form a latch circuit. To this latch circuit, writing of data is performed by way of the seventh p-channel type MOS transistor and the eighth p-channel type MOS transistor. Thus, the latch circuit is made up of a CMOS inverter. Therefore, fast operation can be obtained and drop of drivability can be restrained.

Modular garment comprising: a thick and relatively inflexible protective first garment, intended for optional wear; and an electronic garment having a flexible central part at the back and two side parts; the width of the central part is adjustable so that it can be made narrow or wide (depending on whether the electronic garment is worn on its own or over the first garment); several electrical and / or electronic devices are supported by the side parts; and at least one electrical cable runs across the inside face of the electronic garment between the electrical devices, this cable being attached to the side parts without being attached to the central part in front of which it runs freely along a curved path so as to be able to adapt to the modifications in the width of the central part.

A system for controlling distortion comprising a total harmonic distortion (THD) modeling system configured to apply a chirp signal to a system and to identify one or more frequency bands at which distortion is present, and to apply a ramping signal to identify for each of the one or more frequency bands an input signal level at which distortion is initiated, a signal processing system configured to receive an input signal, to determine whether frequency components are present in the input signal that are associated with the one or more frequency bands at which distortion is present, and to limit the amplitude of the input signal at the one or more frequency bands, such as by applying dynamic range compensation.

In a charge-pump booster circuit, the control clock is controlled on a small-step basis to thereby suppress the boost amplitude and the occurrence of various noises. Provided are a charge-pump booster circuit section for boosting an external power voltage in absolute value level, a boost-voltage feedback section for controlling the booster circuit section, and a clock buffer section. In the boost-voltage feedback section, an output level of the booster circuit section is detected by a voltage detecting section. This is compared with a reference level, and depending upon the comparison result, a count operation is made in an up / down counter section. Based on the count value, the control amount is shifted on a small-step basis from the D / A converter section, thereby controlling the power voltage of the clock buffer section 300 through the level shifter section.

The invention relates to an improved hitch coupling assembly which dampens the hunting movements of a road trailer being towed by a motor vehicle and which is intended for a vehicle combination comprising a motor vehicle and a trailer. More specifically, the inventive hitch coupling assembly (4) comprises: (i) a first pivot coupling (12) for the hunting movements, consisting of a pivoting device which dampens the hunting movements (40) of the trailer and which is housed in a closed space such that it is sheltered from the ingress of pollutant materials; and (ii) a second coupling (21) for the rolling and pitching movements, which is used for the play-free transmission of the hunting movements to the first coupling, the axis of the hunting movements being thus decoupled from the rolling and pitching movements. The damping device preferably comprises a stack of friction disks (41) which are alternately solidly connected to the vehicle or the trailer and which pivot in relation to one another under the effect of the hunting movements.

A system and method of generating electrode stimulation signals for electrode contacts in an electrode array associated with a hearing implant is presented. An input audio signal is processed to generate a plurality of band pass channel signals each representing an associated band of audio frequencies. A stationary noise reduction is applied so as to provide a stationary noise reduced channel envelope from each channel signal. A transient in one or more of the channel envelopes is detected. The channel envelopes are modified as a function of whether the transient is transient noise or transient speech, so as to form transient modified envelope. The transient modified envelopes are used to generate electrode stimulation signals to the electrode contacts.

The invention discloses an enhanced coupling non-linear control method with state restraining for a three-dimensional bridge crane. Firstly, two generalized signals combining trolley displacement and load title angle are introduced, the double targets of accurate trolley positioning and effective load titling elimination are converted into regulation control of the generalized signals, so that a new similar energy function is constructed based on the conversion; in order to control the trolley track error and the load title angle to be in the allowable range all the time, two potential functions and a new similar energy function are combined, so that a novel energy storage function is designed. The method has strong robustness on different rope lengths, load weight, target position and external disturbance; the displacement of a trolley in an X axis direction and a Y axis direction is limited in a proper range, so that the transient state control performance of a system is enhanced; in the whole conveying process, the displacement caused by load titling is limited within an allowable range, so that the amplitude value of the title angle is directly limited.

The invention provides a limiting locking device which is used for a wind tunnel test for an all moving airfoil flutter model. The limiting locking device comprises a support component, a clamping component and a brake component, wherein the support component is used for supporting; the clamping component is rotatably connected on the support component, is used for clamping a all moving airfoil to be tested, and can drive the all moving airfoil to rotate relative to the support component, wherein a rotating shaft is in the vertical direction; the brake component comprises a brake rod and a brake slider; the brake rod is fixed below the all moving airfoil; the brake slider is connected with the support component in a sliding way; an empty groove is formed in the brake slider; and the brake rod extends into the empty groove. With the adoption of the limiting locking device provided by the technical scheme, the amplitude of the all moving airfoil can be effectively limited, thus large amplitude can not suddenly occur on the all moving airfoil during test process, and the possibility that the all moving airfoil is damaged is reduced, and the testing safety is improved.

The invention provides a shortcircuit fault current limiter which comprises a circuit breaker CB1, a transfer current limiting unit and a current detecting unit. The current detecting unit is serially connected with the circuit breaker CB1. The circuit breaker CB1 is parallelly connected with the transfer current limiting unit, an assembly which is composed of the parallelly connected circuit breaker CB1 and the transfer current limiting unit. The output end of the current detecting unit is connected with the control end of the transfer current limiting unit. The current detecting unit detects fault current which flows over the branch circuit of the circuit breaker CB1 in a shortcircuit fault working condition. Furthermore a corresponding triggering switch in the transfer current limiting unit is triggered on, thereby switching off the circuit breaker CB1. A secondary winding of a coupling reactor is serially connected with a system line. Amplitude of the fault current can be quickly restricted, and system impact by the fault current is reduced.

Comparison circuits are provided, corresponding to a plurality of pull up transistors, each for comparing a voltage at an output node and each respective reference voltage different in voltage level from other, and for adjusting a drive current of a corresponding output pull up transistor, and further comparison circuits are provided, corresponding to a plurality of pull down transistors, each for comparing the voltage of the output node and each respective reference voltage different in voltage level from other, and each for adjusting an amount of a drive current of a corresponding pull down transistor in accordance with a result of comparison. The reference voltages each are set to a voltage level between a power supply voltage and a ground voltage. Without a dedicated power supply pin terminal, a signal of a small amplitude having the amplitude limited stably and precisely can be output at high speed.

A multifunctional rotary cutting head is provided for cutting devices as well as portable devices equipped with such a cutting head. The cutting head comprises a rotary housing that has at least a top part and a bottom part and accommodates a support for one or more cutting elements or tools. The support is penetrated by an axial drive shaft on which the support is mounted. The support for the cutting element(s)or tool(s) has two leads to selectively mounting the cutting element(s) or tool(s), i.e. a first level designed to mount strands of cutting wire and a second level designed to mount an interchangeable cutting blade.

The invention discloses an insulated gate bipolar transistor advanced active embedded circuit comprising a basic active embedded circuit, a switch circuit which enables the output of a drive amplification circuit to be in a high-impedance state, an isolation optical coupling circuit and the drive amplifying circuit. The basic active embedded circuit is used for suppressing transient overvoltage occurring between a collector and a transmitter of the insulated gate bipolar transistor; the switch circuit which enables the output of the drive amplification circuit to be in the high-impedance stateis used for enabling the output of the drive amplification circuit to be in the high-impedance state; the isolation optical coupling circuit is used for preliminarily amplifying a drive signal and achieving electric isolation of strong and weak electricity; and the drive amplifying circuit is used for amplifying the drive signal output by the optical coupling circuit. According to the technical scheme provided by the embodiment of the invention, the reliable work of the insulated gate bipolar transistor can be more effectively and safely ensured.

The invention provides an MEMS microphone, comprising a substrate and a capacitor system arranged on the substrate, wherein the capacitor system comprises a vibration film and a first back plate and a second back plate which are arranged at two sides of the vibration film respectively; the vibration film forms a first insulation interval and a second insulation interval with the first back plate and the second back plate respectively; the MEMS microphone also comprises a first insulation support part and a second insulation support part which are positioned in the first insulation interval and the second insulation interval respectively; the length of the first insulation support part in the direction pointing to the second back plate from the first back plate is 1 / 3-2 / 3 of the width of the first insulation interval in the same direction; the length of the second insulation support part in the direction pointing to the second back plate from the first back plate is 1 / 3-2 / 3 of the width of the second insulation interval in the same direction. The first insulation support part and the second insulation support part can achieve the functions of limiting the amplitude of the vibration film, so the damage of the vibration film is prevented under the high-sound pressure work state of the MEMS microphone.

A rectangular thin panel conveyance unit that prevents damage of a plurality of rectangular thin panels while conveying the plurality of rectangular thin panels that are stacked so as not to contact one another. A rectangular thin panel conveyance unit includes a plurality of sets of four corner modules, and vibration suppressing bodies for rectangular thin panels in a fixed shape. The corner module has a support surface to support each corner portion of the rectangular thin panel from a lower side. At each corner portion, stacking the corner modules in a columnar shape in the vertical direction stacks a plurality of rectangular thin panels in the vertical direction. At this time, the vibration suppressing body has the thickness that is equal to or less than the distance between the support surfaces of the corner modules adjacent to one another in the vertical direction. The vibration suppressing bodies are disposed on each of a top surface and an inferior surface of the rectangular thin panel such that the vibration suppressing body faces a planar portion of each rectangular thin panel to restrict amplitude of vibration of the rectangular thin panel in the vertical direction, which is caused by conveyance of the plurality of stacked rectangular thin panels, within a predetermined range. The vibration suppressing body has a contact portion for the planar portion of the rectangular thin panel.