668 results about "Differential transmission" patented technology

Over-terminating the differential mode impedance of a differential transmission line, such as an INFINIBAND™ cable, at the receiving end, improves the differential signal integrity for typical variations in termination network impedance component (e.g., resistor) and transmission line characteristics. Eye opening of the differential signal can be made larger with reduced attenuation but increased jitter compared to under-terminating the differential mode impedance. Because the differential signal quality (larger eye opening) is improved, data can be transmitted over a longer transmission line with the same transmitter and receiver.

Implementations of a discontinuous cable shield system and method include a shield having a multitude of separated shield segments dispersed along a length of a cable to reduce crosstalk between signals being transmitted on transmission lines, such as twisted wire pairs of a cable. The separated shield segments can serve as an incomplete, patch-worked, discontinuous, ‘granulated’ or otherwise perforated shield that can have effectiveness when applied as shielding for differential transmission lines such as with twisted wire pairs.

The invention relates to a method for measuring currents in a motor controller. Some current sensing devices placed on the motor wires or inside the motor controller provide low amplitude output signals thus complicating sampling and data processing. In order to improve the signal/noise ratio, an oversampling technique is disclosed which makes used of a differential transmission of the output signal. Further, by applying intelligent sorting techniques on the sampled data, a substantial improvement in the signal/noise ratio can be obtained. The invention also concerns a motor controller using this method, and discloses the use of a power card and a control card, where the current sensing device is placed on the power card and a differential amplifier is placed on the control card. The gain of the differential amplifier is controlled by components placed on the power card as well as on the control card.

The rotational position of an encoder magnet can be scanned over more than 360° by respective sensor elements in that magnets are disposed on different stages of a suitable transmission, in particular of a differential transmission, and the magnets are scanned by separate sensor elements, whose signals are computed with one another and yield a total number of revolutions.

In particular, when an assembly of this type shall be built very small, undesirable magnetic interferences for the sensor elements have to be avoided through flux conductor elements since the interferences distort the measurement results. Thus, a differentiation is made between active and passive flux conductor elements.

In the case where high speed differential signals are transmitted in differential transmission lines through via holes with open-stubs, signal waveforms are distorted due to impedance mismatch in the open-stubs of the via holes, thus causing jitter, which has become an issue of high speed signals. For differential transmission lines that pass through via holes with open-stubs, a degree of coupling of the lines is decreased while the differential characteristic impedance is made constant. Thereby, the effects of backward cross talk noise caused by the coupling can be minimized, and thus jitter can be suppressed.

A differential transmission connector unit is disclosed that includes a first differential transmission connector including a first electrically insulating block body; and first signal contact pairs and first ground contacts arranged alternately in a row in the first block body; and a second differential transmission connector including a second electrically insulating block body; and second signal contact pairs and second ground contacts arranged alternately in a row in the second block body. The first differential transmission connector is connected to the second differential transmission connector with the first signal contact pairs and the second signal contact pairs being in contact with each other and the first ground contacts and the second ground contacts being in contact with each other. One of the contact surface of each first ground contact and the contact surface of the corresponding second ground contact is a rolled surface, the contact surfaces contacting each other.

A wiring base board and a method of producing thereof relate to a wiring base board of a multilayer structure, and make it possible to perform various kinds of transmission modes such as differential transmission at via parts. For this wiring base board, an insulating substrate is used. The wiring base board has a first via hole part which is formed in the insulating substrate and provides a plurality of circumferential face parts, and a plurality of second via hole parts, forming concentric circles with the circumferential face parts, which are formed in the first via hole part through an insulator. By this, a differential wiring structure and coaxial structure parts are constituted.

The invention relates to a coil component used as a main component of a common mode choke coil or a transformer and a method of manufacturing the same, and the invention is aimed at providing a coil component with a small size and a low height having high differential transmission characteristics and a method of manufacturing the same. A common mode choke coil has a configuration in which an insulation film, a coil conductor, another insulation film, another coil conductor and another insulation film are stacked in the order listed between magnetic substrates provided opposite to each other. The coil conductors have a coil section which is in a trapezoidal general configuration. A top portion of the coil section is formed in a convex configuration such that it bulges in the form of a convex, and a bottom portion of the coil section is formed in a planar configuration.

Described is a planetary harmonic differential transmission, comprised of a rigid externally-toothed inner sprocket, a rigid internally-toothed outer sprocket, a deformable belt that is toothed on both its internal and external faces, and a set of free-rotating planetary sprockets that are mounted on a rotating carrier cage and cause the belt to progressively engage and disengage from successive portions of the rigid sprockets. The input to the transmission is the relative motion between the carrier cage and the inner sprocket, and the output is the relative motion between the outer sprocket and the inner sprocket, resulting in a differential transmission.

The four branch differential Transmission System, (“FBD”), comprises a first input shaft and a second output shaft. Furthermore there are third and fourth shafts which are respectively connected to first and second variators which control the speed (or torque) of the shaft, to which they are connected. Each variator can, for instance, be an electric motor which can adjust the speed of these shafts. The four shafts (branches) of the FBD are connected directly or indirectly via gears. The FBD comprises spur gear planetary gearsets. There is no requirement for a ring gear. The FBD includes two planetary gearsets using several spur gear suns and planets, which form a combination of a plus planetary gearset and a minus planetary gearset.

A differential transmission signal cable is provided. The differential transmission signal cable includes one pair of signal wires including a central conductor covered by an insulating layer, a drain wire arrayed along the signal wires, and an outer conductor for covering the signal wires and the drain wire. The drain wire is covered by a covering film made of a semi-conductive material having flexibility and containing an electrically conductive filler.

A digital interconnect system transmits pulses across a differential transmission line in response to transitions in an input data signal.

The present disclosure related to an apparatus for the adjustment of horizontal stabilizers for aircraft in relation to the aircraft axis with mechanical power transmission from two drives to the horizontal stabilizer. In accordance with the present disclosure, two differential transmissions coupled via a connection shaft drive the horizontal stabilizer via mechanical transmission means such as a respective spindle and a spindle nut.

A semiconductor optical modulator includes optical input and output portions; a plurality of Mach-Zehnder modulators including first and second waveguide arms having first and second modulation electrodes, respectively; an optical demultiplexer coupled between the optical input portion and the Mach-Zehnder modulator through an optical waveguide; an optical multiplexer coupled between the optical output portion and the Mach-Zehnder modulator; a plurality of electrical inputs including first, second, and common electrodes disposed between the first and second electrodes; and a plurality of differential transmission lines electrically connecting the electrical inputs to the Mach-Zehnder modulators. The Mach-Zehnder modulators, the optical demultiplexer, the optical multiplexer, the electrical inputs, and the differential transmission lines are disposed on a single substrate. In addition, the first and second modulation electrodes, the electrical inputs, and the differential transmission lines have a differential impedance in a range of 80Ω to 95Ω.

A lead frame package is disclosed where transmission signals are coupled into a die from a pair of lead frames through bonding wires that are separated by no more than three times a diameter of one of the bonding wires. In some embodiments, pairs of lead frames carrying differential transmission signals can be shielded by adjacent pairs of ground and power leads that are coupled into the die through bonding wires that are also separated by no more than three times a diameter of one of the bonding wires.

The invention discloses a novel planetary speed reducer and a speed reduction motor. The planetary speed reducer comprises a planetary wheel frame 2, a fixed ring gear 4, a moving ring gear 5, a coupling plate 6, an output shaft 7, a shell 9, an end cover 8 and an input shaft 11, wherein the planetary wheel frame 2 is fixed on the input shaft 11 and is provided with at least one planetary gear 3; the fixed ring gear 4 is fixed on the end cover 8; the moving ring gear 5 is fixed on the coupling plate 6; the output shaft 7 is fixed on the coupling plate 6; the shell 9 is positioned on the output shaft 7 through a bearing; the end cover 8 is positioned on the input shaft 11 through a bearing; the shell 9 and the end cover 8 are fastened tightly; the fixed ring gear 4 and the input shaft 11 are coaxial; the moving ring gear 5 and the output shaft 7 are coaxial; the fixed ring gear 4 and the moving ring gear 5 are same in size and different in gear quantity; and the fixed ring gear 4 and the moving ring gear 5 are parallel and coaxial, are meshed with at least one planetary gear 3 to form a novel planetary differential transmission mechanism. According to the invention, high-efficiency large speed ratio transmission can be realized, the structure is simple, the cost is low, and the application range is wide.

A differential transmission circuit includes a grounded conductive layer, a pair of transmission line conductors, a conductive film and a via hole which connects the grounded conductive layer to the conductive film. The differential transmission circuit further includes a straight-line region which is present in the differential transmission circuit through which a differential transmission signal output by a driving circuit is transmitted and in which the pair of transmission line conductors extends parallel so as to have a first width, and a band rejection filter region in which the pair of transmission line conductors planarly overlaps the conductive film and extends parallel so as to have a second width narrower than the first width and a common mode of the differential transmission signal is attenuated at one of the frequencies which are natural number multiples of a frequency corresponding to the predetermined bit rate.