153 results about "Balanced line" patented technology

A non-contacting rotary interface has a first core with a first pair of balanced transmission lines coupled to the first core and a second core moveable in relation to the first core with a second pair of balanced transmission lines coupled to the second core and configured to receive signals from the first pair of balanced transmission lines. The first pair of balanced transmission lines has a first transmit wire coupled to a first transceiver at a first end of the first transmit wire, a second transceiver coupled to the first transmit wire at a second end of the first transmit wire, a second transmit wire coupled to a third transceiver at a first end of the second transmit wire, and a fourth transceiver coupled to the second transmit wire at a second end of the second transmit wire. The balanced transmission lines may be electrical traces on a circuit board.

An RMS-to-DC converter implements the difference-of-squares function by utilizing two identical squaring cells operating in opposition to generate two signals. An error amplifier nulls the difference between the signals. When used in a measurement mode, one of the squaring cells receives the signal to be measured, and the output of the error amplifier, which provides a measure of the RMS value of the input signal, is connected to the input of the second squaring cell, thereby closing the feedback loop around the second squaring cell. When used in a control mode, a set-point signal is applied to the second squaring cell, and the output of the error amplifier is used to control a variable-gain device such as a power amplifier which provides the input to the first squaring cell, thereby closing the feedback loop around the first squaring cell. Accurate square law approximation at microwave frequencies can be achieved by implementing the squaring cells as series-connected three-transistor multi-tanh transconductance cells. By using carefully balanced squaring cells and a well-balanced error amplifier, approximation errors are cancelled and accurate RMS measurement is realized at high frequencies. A feedforward bootstrapping feature uses an op amp to balance the voltages at the common nodes of the transconductance squaring cells and also provides a balanced differential input drive to one of the squaring cells. A base current compensation circuit for providing accurate base compensation current to both of the squaring cells prevents errors due to DC offset voltages.

A loop antenna unit (2), a balanced line (3), and two perturbation elements (4) are formed on a dielectric board (1) by using manufacturing methods, such as printing and etching. The loop antenna unit (2) is formed along the circumference of a circle, and is connected to the balanced line (3). Each of the two perturbation elements (4) is a member in the shape of a tooth which is inclined 45 degrees against a direction of feeding of power via the balanced line (3) and which is projecting from the loop antenna unit (2) in an inward direction toward the center of the loop antenna unit (2). The two perturbation elements (4) are arranged at two opposite points in the loop antenna unit (2) so that they are opposite to each other.

A high speed transmission connector including several signal contact pairs arranged in a parallel array, each including a pair of signal contacts constituting a balanced transmission line; several ground contacts, each being arranged between two signal contact pairs arranged in the parallel array; and an electro-insulating body supporting the signal contact pairs and the ground contacts. Each signal contact is provided with a contacting section at one longitudinal end for conductive contact with a corresponding signal contact of a counterpart connector, a board connecting section at another longitudinal end for connection with a conductor on a circuit board, and an attaching section between the contacting section and the board connecting section for an attachment to the body. All of the board connecting sections of the signal contacts are disposed along a first lateral surface of the body. The signal contacts of the signal contact pairs are individually covered, at least partially, by materials having dielectric constants different from each other, in certain regions defined between board connecting sections and attaching sections.

A loop antenna unit (2), a balanced line (3), and two perturbation elements (4) are formed on a dielectric board (1) by using manufacturing methods, such as printing and etching. The loop antenna unit (2) is formed along the circumference of a circle, and is connected to the balanced line (3). Each of the two perturbation elements (4) is a member in the shape of a tooth which is inclined 45 degrees against a direction of feeding of power via the balanced line (3) and which is projecting from the loop antenna unit (2) in an inward direction toward the center of the loop antenna unit (2). The two perturbation elements (4) are arranged at two opposite points in the loop antenna unit (2) so that they are opposite to each other.

An ultra-broadband balun is provided. The balun comprises: a first unbalanced transmission line comprising a first ground trace and a signal trace; and a balanced transmission line comprising a first and second signal trace, wherein the first signal trace of the balanced transmission line is connected to the first ground trace of the first unbalanced transmission line and the second signal trace of the balanced transmission line is connected to the signal trace of the first unbalanced transmission line, wherein a first capacitor is disposed in series with one of the first ground trace of the first unbalanced transmission line and the first signal trace of the balanced transmission line.

Conductor segments are positioned within a transmission line structure in order to generate microwave pulses. The conductor segments are switchably coupled to one or the other of the transmission lines or to each other, in parallel with the transmission line structure. Microwave pulses will be induced in the transmission line by closing the switches in a controlled manner to discharge successive segments or successive groups of segments into the transmission lines. The induced waves travel uninterrupted along the transmission lines in a desired direction.

The invention discloses a free line Modem which is characterized by comprising one or any combination of a telephone line, a coaxial line, a network line, a twisted-pair and a balanced line. The free line Modem comprises a controlling and processing module (A), a power supply module (H), a standard Ethernet physical interface (B), an Ethernet protocol processing module (C), an any line protocol processing module (D), a line modulation / demodulation module (E), an any line simulation front end module (F) and an any line physical interface (G). A bus type multi-medium multi-point networking broadband network constructed by using the any line Modems comprises at least two any line Modems and multiple kinds of line passive branch networks (f) and is connected with an external device through the network line, wherein the external device is a user terminal device (g) or broadband access terminal (c), and topological structures of the line passive branch networks (f) are chain-shaped, star-shaped, tree-shaped topological structures or mixed topological structures.

An FBAR filter includes a wafer, a filter circuit unit and a balun circuit unit. The filter circuit unit includes a plurality of FBAR resonators formed on a predetermined region on a top of the wafer. The balun circuit unit includes a plurality of metal layers electrically connected to each other to implement a balun circuit and a plurality of dielectric layers each placed between the plurality of metal layers. The balun circuit unit is electrically connected to the filter circuit unit on a predetermined region of the wafer.