Analog Devices

The present disclosure provides a magnetic multi-turn sensor having a length of magnetoresistive film, wherein the magnetoresistive film comprises a free layer of ferromagnetic material. The free-layer of ferromagnetic material has at least one region of increased thickness, relative to a thickness of the free-layer along the rest of the length of magnetoresistive film. In particular, the free layer is provided with an increased thickness in regions where an increased operating window is required. For example, in closed loop sensors, the points in which two section of magnetoresistive film cross (e.g., to close the loop) may require a higher magnetic operating window to prevent domain wall nucleation in that region.

Magnetic sensors with magnetic field immunity are disclosed. In one aspect, a magnetic sensor includes an array of magnetic sensor cells. Each of the magnetic sensor cells includes a magnetic field source, and a plurality of magnetoresistive (MR) sensors arranged in a bridge circuit. The bridge circuit is configured to output a signal indicative of a force applied to the magnetic sensor based on movement of the magnetic field source relative to the MR sensors. The MR sensors are arranged such that the signal output by the bridge circuit is substantially unaffected by an external magnetic field.

The present disclosure relates to interleaved analog-to-digital converters (ADCs) that can provide an analog finite impulse response anti-alias filter. The analog finite impulse response anti-alias filter can have an impulse response duration that is longer than an interleaving time conversion window of an individual interleaved ADC of the interleaved ADC.

Techniques are described to control the quantizer clock edge to adjust a delay of the feedforward path, which includes the quantizer and the digital-to-analog converter (DAC), to sustain matching over varying clock frequencies as well as over process, voltage, and temperature (PVT). A digitally controlled phase/time delay generating block may be used to control the quantizer clock edge, in an open loop or within a feedback loop, to provide the required time delay or advancement. Calibrations may be performed in the foreground and/or background. Using various techniques, the delay element design may focus on accurate wideband matching without focusing on tunability over varying clock frequencies.

Apparatus and methods for compact transmission lines are disclosed herein. In certain embodiments, a transmission line includes a pair of coupled lines including a first conductive line that is electromagnetically coupled to a second conductive line. A first port is electrically connected to a first end of the first conductive line, while a second end of the first conductive line is electrically connected to a first end of the second conductive line. Additionally, a second port is electrically connected to a second end of the second conductive line such that the transmission line is provided between the first port and the second port.

The present disclosure provides a magnetic arrangement for use with a magnetic sensing device comprising an angle sensor and multi-turn sensor, the magnetic sensing device being arranged in off-shaft position. Specifically, the present disclosure provides a diametrically magnetized magnet in which the amount of magnetic material in the region of the magnetic poles is reduced relative to the regions between the magnet poles to thereby provide a more homogenous magnetic flux density. In doing so, this enables the magnet and the sensing device to be arranged more compactly. The present disclosure also provides a method of magnetising the magnetic arrangements described herein for improving the accuracy of the angle sensing measurements when the sensing device is placed in an off-shaft position, wherein the magnet is magnetised in a specific direction by applying a current to two sets of electrical conductors positioned on opposite sides of the magnet.

A power disconnect switch may include a first terminal configured to couple to a boost converter output and a second terminal configured to couple to a load. A comparator may include a first input terminal configured to couple to a source input, a second input terminal configured to couple to the boost converter output, and a first output terminal configured to output a signal indicating a condition of the boost converter output being less than or equal to the source input. A control circuit may include an input terminal coupled to the first output terminal of the comparator and a second output terminal coupled to the power disconnect switch. The control circuit may be configured to open the power disconnect switch in response to receiving the signal indicating the condition.

First node signal-separation circuitry obtains first node electrical transmit signal (TX1) from a full-duplex electrical communication signal. First node transmit components convert TX1 to a first node optical transmit signal (OTX1) and send OTX1 over an optical link. Second node receive components receive OTX1 and convert it to a first node electrical transmit signal (TX1) at the second node. Second node signal-separation circuitry obtains a second node electrical transmit signal (TX2) from a full-duplex electrical communication signal of the second node. Second node transmit components convert TX2 to a second node optical transmit signal (OTX2) and send OTX2 over the optical link. First node receive components receive OTX2 from the optical link and convert it to TX2 at the first node. At each node the full-duplex electrical signal comprises a superposition of a locally transmitted electrical transmit signal and a counterpart electrical transmit signal received from the optical link.

Described herein are isolator devices designed to reduce cracking and mechanical stress despite the use of wire bonds made of hard materials (e.g., copper-based). The isolators employ thin film dielectric materials with high dielectric strength and permittivity underneath the top coil (electrode) to enhance the isolation of the device. However, these materials are susceptible to cracking. Described herein are designs in which the dielectric material is partially removed from the isolator. A dielectric layer may be kept in the region(s) where its large dielectric permittivity is particularly beneficial (e.g., near the edge of a coil) but may be removed from the region immediately underneath the bonding pad, where a large amount of pressure is applied during the bonding process. Optionally, a cushion layer is employed to absorb some of the energy produced during the bonding process.

A method and circuit arrangement for a solid state switch device is disclosed. In certain embodiment, a solid state switch device comprising a controllable switch comprising a control terminal, a first channel terminal, and a second channel terminal, and arranged to be switched between an off-state and an on-state, wherein in the on-state the switch allows a current to flow between the first channel terminal and the second channel terminal. The solid state switch device further comprising: a first compensation circuit configured to: generate a first boost current based on a voltage difference between the first channel terminal and the second channel terminal; and apply the first boost current to the control terminal to charge a switch capacitance of the controllable switch.