Nxp B.v.

Fabio Sebastiano

Robert Hendrikus Margaretha Van Veldhoven

Lucien Johannes Breems

Salvatore Drago

Dominicus Martinus Wilhelmus Leenaerts

Edwin Jan Schapendonk

Bram Nauta

Robert Van Veldhoven

Gerard Villar Piqué

Kofi Afolabi Anthony Makinwa

Raf Lodewijk Jan Roovers

Robert Henrikus Margaretha Van Veldhoven

Sander Derksen

Maël Demarets

Pieter Van Der Zee

Burak Gonen

Dominicus Martinues Wilhelmus Leenaerts

Robert Hendrikkus Margaretha Van Veldhoven

A controllable oscillator including an upper oscillator coupled between an upper supply voltage and an upper intermediate node that provides at least one upper oscillating signal on at least one upper oscillating node, a lower oscillator coupled between a lower intermediate node and a lower supply voltage that provides at least one lower oscillating signal on at least one lower oscillating node, an oscillation controller coupled between the upper and lower intermediate nodes, and amplification circuitry coupled between the upper and lower supply voltages, having at least one upper input coupled to the at least one upper oscillating node, having at least one lower input coupled to the at least one lower oscillating node, and having a primary output node for providing a primary rail-to-rail oscillation signal. A coupling circuit may be coupled between one or more upper and lower oscillating nodes for synchronization.

Low power voltage controllable oscillator with rail-to-rail output

A sensor system is disclosed. The sensor system includes a first sensor path comprising a first sensing element and a second sensing element being connected in series between a first supply terminal and a second supply terminal and an intermediate node connected in between the first supply terminal and the second supply terminal, a second sensor path comprising a third sensing element and a fourth sensing element connected in series between the first supply terminal and the second supply terminal, a first reference node connected in between the first supply terminal and the second supply terminal, and a second reference node connected in between the first supply terminal and the second supply terminal, and a processing unit to receive an input signal from the intermediate node, a first reference signal from the first reference node, and a second reference signal from the second reference node.

Sensor system with a full bridge configuration of four resistive sensing elements

A magnetic sensor arrangement for determining information indicative of characteristics of a mechanical component has a first magnetic sensor to sense a signal associated with a periodic changing magnetic field generated by relative movement of the mechanical component and the magnetic sensor arrangement, a second magnetic sensor to sense that signal, wherein the first sensor is arranged a fixed distance from the second sensor, and a determination unit coupled to the first and second sensors to receive output signals of the first and second sensors. The output signal of the first sensor is phase-shifted to the output signal of the second sensor, to compare the output signals for determining the absolute phase of the signal associated with the periodic changing magnetic field, and to determine information indicative of characteristics of the mechanical component based on the determined absolute phase of the signal associated with the periodic changing magnetic field.

Magnetic sensor arrangement

There is described a device for removing an offset from a signal, the device comprising (a) a frequency estimation unit () for estimating a frequency of the signal, (b) an offset estimation unit () for estimating the offset in the signal by applying an adaptive low pass filter to the signal, wherein a cut-off frequency of the adaptive low pass filter is determined based on the frequency of the signal estimated by the frequency estimation unit (), and (c) a subtraction unit () adapted to subtract the offset estimated by the offset estimation unit () from the signal. There is also described a filter unit comprising the device. Furthermore, there is described a corresponding method of removing an offset from a signal as well as a computer program and a computer program product for performing the method by means of a computer.

Offset compensation for zero-crossing detection

There is described a driver for a switched capacitor circuit (), the driver comprising (a) a voltage amplifier () comprising a signal input (), a feedback input () and an amplifier output (), and (b) a feedback network () coupled between the amplifier output () and the feedback input (). The feedback network comprises a track-and-hold circuit () adapted to mask a voltage dip occurring at the amplifier output () at the beginning of a switched capacitor circuit charging phase. There is also described a switched capacitor circuit comprising such a driver, a sensor device, and a method of driving a switched capacitor circuit.

Driver for switched capacitor circuits

An efficient analog to digital converter is disclosed. The efficient analog to digital converter includes a coarse analog to digital converter coupled to an input analog signal. The coarse analog to digital converter is configured to provide an approximate digital representation of the input analog signal. The efficient analog to digital converter also includes a fine analog to digital converter coupled to the input analog signal. The output of the coarse analog to digital converter is coupled to the fine analog to digital converter. The fine analog to digital converter is configured to set input range of the fine analog to digital converter as a function of the output of the coarse analog to digital converter.

Efficient analog to digital converter

A low power frequency synthesizer circuit for a radio transceiver, the synthesizer circuit comprising:

Frequency synthesiser

An input stage for an A/D converter includes a transconductance element adapted to receive, at a first input of the transconductance element, an analog input signal that is to be converted to a digital signal by the A/D converter, a feedback path for providing an analog feedback signal to a second input of the transconductance element, the analog feedback signal being based on a digital output signal of the A/D converter, and an integrator for integrating an output current of the transconductance element, wherein the integrating element is adapted to generate an integrator output signal representative of the integrated output current. The input stage may be included in an A/D converter. A plurality of such A/D converters may be included in a system.

A/D converter input stage providing high linearity and gain matching between multiple channels

A magnetic sensing system, including: a magnetic component proximate a movable mechanical component; and a magnetic sensor configured to determine a movement of the mechanical component based on a magnetic field produced by the magnetic component. The magnetic sensor includes: a low-offset magnetic sensing element; a high-sensitivity magnetic sensing element; and an offset compensation circuit configured to: determine a zero-crossing of a sensing field from an output of the low-offset magnetic sensing element; sample an offset value of the high-sensitivity magnetic sensing element at the zero-crossing; and subtract the offset value from an output of the high-sensitivity magnetic sensing element.

Magnetic sensor with low electric offset

Communication networks are implemented using a variety of devices and methods. In a particular embodiment for use in a communication network having RF-communication devices that communicate using a RF protocol, an RF-communication device is implemented with an RF transceiver () to communicate over the network using the RF protocol and being controllable in a reduced power-consumption mode in which the RF transceiver does not communicate over the network. The device also includes an RF receiver () including an envelope detector () and a pulse generator circuit (). The envelope detector circuit () providing an envelope-based signal to a pulse generator circuit () that, in response to the envelope-based signal and after generating a number of pulses that exceeds a predetermined number of pulses, prompts the RF transceiver () to transition out of the reduced power-consumption mode.

Method and system for impulse radio wakeup

The present invention relates to a circuit and a method for automatic common-mode rejection calibration in a differential conversion system and unbalance compensation for balancing the operation point of a circuit in the signal path and for enhancing the common-mode rejection. The circuit for automatic common-mode rejection calibration in a differential conversion system comprises an analog input stage for an analog input signal (), an analog-digital-converter () for converting an analog signal () into its digital representation (), a digital block () arranged to adapt said digital representation () of a portion of a DC offset of said analog input signal () in accordance with whether said analog input signal () is in a predetermined input range of said analog-digital-converter (), and a digital-analog-converter () arranged in a feedback path () from said digital block () to subtraction means () of said analog input stage for converting a digital signal () into an analog output signal (), wherein said analog output signal () is subtracted from said analog input signal () resulting in said analog signal ().

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Rotterdam, Netherlands

Fabio Sebastiano