40results about How to "Small offset" patented technology

A fast, accurate, low offset comparator may be configured with multiple gain stages. A low gain, low input impedance, and fully differential common-gate amplifier may be configured as a first stage in the multi-stage comparator, providing a wide bandwidth for small power consumption. The inputs of the comparator may comprise a pair of differential inputs at respective source terminals of gate-coupled metal oxide semiconductor (MOS) devices configured in the input stage of the common-gate amplifier. A pair of differential outputs of the first stage may be coupled to a pair of differential inputs of a second stage, which may be a differential input current-mirror amplifier that may perform differential to single-ended conversion. The single-ended output of the second stage may serve as the input into a latch, which may be a bistable set-reset (SR) latch configured to increase the gain and response time while protecting against multiple switching, with the single-ended output of the latch configured as the output of the comparator.

A method of determining at least one rotation parameter of a wind turbine rotor rotating with a rotation speed and a phase is provided. The method comprises the steps of: measuring an effective centrifugal force acting in a first pre-determined direction, which is defined in a co-ordinate system rotating synchronously with the rotor, on at least one reference object located in or at the rotor, establishing a first angular frequency representing the rotation speed of the rotor on the basis of variations in the measured effective centrifugal force due to gravitational force, establishing a second angular frequency representing the rotation speed of the rotor by use of at least one yaw rate gyro, and establishing the value of the rotation speed as the rotational parameter by correcting the second angular frequency by comparing it to the first angular frequency.

An optical bandpass separator and systems based thereon split target and continuum band signals. The separator includes a first optical path for selectively transmitting a target band signal. The first optical path includes a first prism and a first bandpass filter. The separator includes a second optical path non-overlapping with the first optical path for transmitting a continuum band signal. The second optical path includes a second prism and a second bandpass filter. The spacing of the first and second optical paths allows the simultaneous and separate imaging or detection of the target band signal and the continuum band signal using a single imager or detector.

The invention relates to a charging/discharging station (2) for charging or discharging an at least partly battery-operated vehicle (14) via an inductively coupled pair of coils. The charging/discharging station (2) comprises in particular a computer device (12), in which spatial coordinates of parking areas (4) are stored and which has means to navigate a vehicle (14) to the parking area (4) by means of communication units (8, 16) by using image data of the vehicle (14) recorded by means of a camera device (10) and by using physical coordinates of the parking areas (4). The invention further relates to a method for operating such a loading/discharging station (2).

In a conventional EA/DFB laser, since the temperature dependence of the operation wavelength of the EA portion is substantially different from that of the DFB portion, the temperature range over which a stable operation is possible is small. In the case of using the EA/DFB laser as a light emission device, an uncooled operation is not possible. An EA/DFB laser which does not require a temperature control mechanism is proposed. A quantum well structure in which a well layer made of any one of InGaAlAs, InGaAsP, and InGaAs, and a barrier layer made of either one of InGaAlAs or InAlAs is used for an optical absorption layer of an EA modulator. By properly determining detuning at a temperature of 25° C. and a composition wavelength of the barrier layer in the quantum well structure used for the optical absorption layer, it can be realized to suppress the insertion loss, maintain the extinction ratio, and reduce chirping simultaneously over a wide temperature range from −5° C. to 80° C.

An optical pickup includes a light source, an objective lens for condensing a light beam emitted from the light source on a disk, a hologram element for splitting the light beam reflected by the disk, a photo detector for receiving the split light beam, a holding element for holding the objective lens and the hologram element, and an actuator for driving the holding element, the objective lens and the hologram element as one unit to shift in a tracking direction.

The invention relates to a motor activation circuit (10) for a rail vehicle having a boost converter, which is disposed at the input of the motor activation circuit, and which converts a mains DC voltage (Udc), which is applied at the input of the motor activation circuit, into an intermediate circuit DC voltage (Uzk), a pulse rectifier, which is downstream from the boost converter, and which can be connected at the output to a drive motor of the rail vehicle and is capable of converting the intermediate circuit DC voltage of the boost converter into a motor drive voltage for driving the drive motor, and a control unit, which activates the boost converter and which activates the boost converter in operation such that said converter generates the predetermined rated intermediate circuit DC voltage for a mains DC voltage below a predetermined rated intermediate circuit DC voltage as the intermediate circuit DC voltage. According to the invention, the control unit is designed such that it activates the boost converter (20) for a mains DC voltage (Udc) above the rated intermediate circuit DC voltage (Unenn) such that said converter generates an intermediate circuit DC voltage (Uzk) identical to the mains DC voltage (Udc) or an intermediate circuit DC voltage, which is greater at most by a predetermined offset value (Uoffset), and feeds said intermediate circuit DC voltage into the pulse rectifier.

The present invention provides a dual-channel TIADC (time-interleaved A/D converter) frequency response mismatch real-time calibration method for narrowband signal sampling. According to the method, a frequency response function in a polynomial form is adopted to characterize the linear mismatch characteristic of a system; Gaussian white noises are artificially superimposed to narrowband input signals, so that obtained signals are adopted as the input signals of a TIADC; mismatch information is obtained by using slight oversampling; mismatch error is estimated when being corrected by using a variable step size least mean square error (VSSLMS) algorithm in real time; compared with a basic LMS algorithm, the VSSLMS algorithm has fast convergence performance in a large error range and low mismatch quantity in a small error range, thereby improving tracking performance; corrected output is obtained, a filter is designed to filter out the white noises, so that desired output can be obtained. With the method adopted, the problem that the narrowband input signals cannot avoid the problem of error energy on an oversampling tape can be solved; and it can be ensured that the parameters of the system can converge to be accurate values, so that effective correction can be realized. The method has the advantages of simplicity, easiness in implementation and excellent calibration effect.

A treatment instrument for coronary artery bypass operation, comprising a plurality of sucking members. Each of the sucking members comprises a flexible tube (102), a suction cup part (101) fitted to the tip side of the flexible tube (102), a three-way valve (103) installed in the flexible tube (102), and a holding member (104) holding the flexible tube (102). At least one sucking member further comprises a duck bill valve (111) installed in the flexible tube (102).

A brake disc has an outer friction path on one side and an inner friction path on the other side. Between the friction paths free spaces are provided, which on the outer friction path side have a different configuration than on the inner friction path side.

The invention provides a circuit for improving contactless card strong field modulation waveform and modulation length. Under the situation that other circuits are not changed, better modulation waveform and better modulation length can be obtained in a strong field.

An amplifier arrangement and also a control loop having the amplifier arrangement are specified, wherein the amplifier arrangement is based on a Gilbert multiplier. Connected in parallel in this case with one of the transistors of the differential amplifier cells is an additional transistor, at which it is possible to tap off a signal that is proportional to the gain factor. Processing this signal in a suitable manner, for example in a control loop, makes it possible to compensate for temperature and manufacturing fluctuations and also to obtain a highly linear characteristic curve having a gain factor which can be set in a stable manner. In addition, the structure shown is current-saving and can be used, in particular, for application in radio frequency technology as an amplifier having a variable gain factor (VGA).

To obtain a magnetic sensor unit in which the deviations or the inclinations of magnetic resistance elements and a permanent magnet are low and which has substantially equivalent electric resistance values of magnetic resistance elements, by imparting equivalent magnetic fields to both of a pair of two magnetic resistance elements; and to intend to reduce the changing amount of a mid-point voltage due ot a temperature change. Many magnetic resistance elements are formed on an unmagnetized permanent magnet material, and are cut together with the permanent magnet material accurately by a dicing machine or the like. The magnetic resistance elements divided into a plurality are individually taken out, and the permanent magnet material is magnetized to a permanent magnet. The center of the magnetized permanent magnet material substantially coincides with that of the pair of two magnetic resistance elements, and equivalent magnetic fluxes can be imparted to both of the pair of two magnetic resistance elements.

In special reproduction, pictures whose display timings are set in advance are sequentially transferred to a decoder side. When a decode start instruction is outputted during the first transfer of a picture, the second transfer of the picture is started at the transfer completion timing of the first transfer if a transfer completion timing of the second transfer comes before a transfer start timing corresponding to the display timing of a subsequent picture.

The invention relates to a grinding mill. The grinding mill comprises a cylindrical rotating cylinder, a motor and a base. The grinding mill is characterized in that a material door is formed in the rotating cylinder; the width of the material door is consistent with that of the rotating cylinder; the material door can be overturned outwards relative to the rotating cylinder around a rotating shaft; a locking mechanism is arranged at a corresponding position of the material door and the rotating cylinder; a transmission gear is arranged on the side wall of the rotating cylinder; the motor drives the transmission gear for rotation through a transmission belt; bearings are connected to two sides of the rotating shaft of the rotating cylinder, and are respectively mounted in each bearing mounting ring; a limiting ring and an elastic plate are arranged in each bearing mounting ring; each limiting ring is located in the corresponding bearing mounting ring; a plurality of elastic plates adopt a semi-moon-shaped structure; each limiting ring and the corresponding bearing mounting ring are concentrically arranged; the elastic plates are respectively arranged in an annular region limited byeach limiting ring and the corresponding bearing mounting ring; the arc top of the semi-moon-shaped structure of each elastic plate is in top connection with the outer periphery of the correspondinglimiting ring, and fixation is realized through a corresponding connecting piece; two ends of the semi-moon-shaped structure of each elastic plate are connected with the corresponding bearing mountingring through one corresponding fixing piece; the elastic plates are used for enabling a shaft axis of the rotating shaft to be in reciprocating motion along an elastic mechanism; and the bearing mounting rings are fixed relative to the base, and are supported by the base.

The invention discloses a single-cavity frameless laminated double-glass assembly. The assembly comprises a front glass layer, a first POE adhesive film layer, a solar cell string layer, a second POEadhesive film layer and a back glass layer which are arranged in sequence, a POE adhesive film cushion block is arranged between the back glass layer and the second POE adhesive film layer, and a hardadhesive tape is arranged between the second POE adhesive film layer and the solar cell string layer. The invention also discloses a laminating method. The method comprises the following steps: performing laying according to the structure to form the assembly, directly putting the assembly into laminating equipment without adhesive tape edge sealing after the assembly laying, and laminating the assembly through a two-section laminating method. No edge sealing adhesive tape is adopted, the material cost can be effectively reduced, no frame laminating tool is adopted, the production proceduresare reduced, the production efficiency is improved, and the problems of dissociation and subfissure of battery piece strings are effectively prevented.