Nxp B.v.

Sebastien Robert

Fabian Rivière

Sebastien Amiot

Franck Bisson

Guy Le Moal

Nguyen Trieu Luan Le

Olivier Jamin

Luca Lococo

Samuel Becqué

Christophe Olivier Mertens

Jerome Brillant

Mohamed Bouhamame

Fabien Laurent Michel Deforeit

Walter Jaudard

Samuel Becque

A receiver includes at least a first amplifier configured to receive a received signal and provide a first amplified signal based thereon, a mixer configured to receive the first amplified signal and provide an intermediate frequency signal based thereon and a second amplifier configured to receive the intermediate frequency signal and provide a second amplified signal based thereon. An automatic gain controller for the receiver is configured to, based on a first overload signal indicative of a first frequency range of the first amplified signal having one or more frequency components exceeding a first maximum signal power threshold and a second overload signal indicative of a second frequency range, narrower than the first, of the second amplified signal having one or more frequency components exceeding a second maximum signal power threshold, provide for control of a respective gain of one or both of the first amplifier and the second amplifier.

Automatic gain controller

Wireless receivers and related methods with interferer immunity are disclosed. The receiver includes a receive (RX) front-end, a power level detector, and an automatic gain controller (AGC). The RX front-end includes circuit(s) having variable gains, and the power level detector outputs a power level indicator. The AGC receives the power level indicator and outputs the gain settings to the variable-gain circuits within the RX front-end. Further, the AGC is configured to adjust the gain settings within a first gain range when not receiving data frames and to adjust them within a second gain range when receiving data frames. The second gain range is a restricted version of the first gain range. Further, the AGC can be configured to detect and store gain settings within a sliding time window when data frames are not being received and to use these stored gain settings to determine the second gain range.

Wireless receivers and related methods with random interferer immunity

An integrated circuit comprising a transceiver including a transformer. The transformer includes an input coupled to one or more primary windings. The transformer also includes a first differential output coupled to a first set of one or more secondary windings. The transformer further includes a second differential output coupled to a second, different set of one or more secondary windings. A method of making an integrated circuit comprising a transceiver. The method includes forming a plurality of components on and/or in a semiconductor substrate. At least one of the components comprises a transformer. The method includes forming the transformer by forming one or more primary windings coupled to an input, forming a first set of one or more secondary windings coupled to a first differential output, and forming a second, different set of one or more secondary windings coupled to a second differential output.

Integrated circuit including a plurality of components including a transformer

An amplifier includes a supply voltage terminal and a reference voltage terminal and an input terminal. An amplifier arrangement includes a first and second branch coupled between the supply and reference voltage terminals, and one or more transistors configured to provide current flow through each of the branches based on the input signal at the input terminal. A first output terminal is coupled to the first branch to provide a first output signal based on the current flow therethrough. A second output terminal is coupled to the second branch to provide a second output signal based on the current flow therethrough. An impedance-modifying circuit is coupled to the second output terminal to provide a voltage variation in the second output signal in response to the input signal greater than a voltage variation in the first output signal in response to the input signal.

Amplifier and a wireless signal receiver comprising said amplifier

A multi-mode transceiver arrangement configured to provide for transmission and reception of signalling of a plurality of wireless sensor network protocols, the transceiver comprising;

Multi-mode transceiver arrangement

A single tone RF signal generator and a method of generating a single tone RF signal. The single tone RF signal generator includes an output and a power amplifier that has an input. The power amplifier is operable to receive an RF signal including a first harmonic corresponding to a single tone signal to be produced by the signal generator. The power amplifier is also operable to amplify the RF signal. The power amplifier is further operable to provide the amplified RF signal to the output of the signal generator. The single tone RF signal generator further includes a feedback circuit connected between the output of the signal generator and the input of the power amplifier. The feedback circuit is configured to add one or more predistortion harmonics to the RF signal received by the power amplifier for cancelling harmonics in the amplified RF signal provided by the power amplifier.

Single tone RF signal generator

A tunable RF filter, comprising: an emitter follower stage (); and a common emitter stage (); the common emitter stage () providing feedback to the emitter follower stage (). The common emitter stage () may comprise a first transistor (Ti) being the only transistor of the common emitter stage (); and the emitter follower stage () may comprise a second transistor (T) being the only transistor of the emitter follower stage (). A further tunable RF filter provides improved linearity, comprising: an emitter follower stage (); a joint common emitter and emitter follower stage (); and a gain stage (); a common emitter output of the joint common emitter and emitter follower stage () providing feedback to the emitter follower stage (), and an emitter follower output of the joint common emitter and emitter follower stage () providing an input to the gain stage ().

Tunable RF filter

An adaptive stepped gain amplifier, for example for use in broadband receivers, has a step size which is dynamically compensated (for each received frequency) to cope with step error caused by frequency dependence of the amplifier performance.

Adaptive stepped gain amplifier system and method

A receiver () comprising an amplifier () having an input () and an output (). The input () of the amplifier is configured to receive a signal. The receiver also comprises a feedback path () between the output () and the input () of the amplifier (), wherein the feedback path () includes a filter () and a buffer amplifier () in series. The input of the buffer amplifier () is connected to the output () of the amplifier (). The output of the buffer amplifier () is connected to the input of the filter (). The output of the filter () is connected to the input () of the amplifier (). The filter () is configured to pass signals having a desired frequency.

Receiver

The invention relates to a programmable filter for a radiofrequency receiver, embodiments disclosed including a filter () comprising an input () for receiving a radiofrequency signal, an output () for providing a filtered version of the input radiofrequency signal and a plurality of filter paths (-) connected in parallel between the input () and output (), each filter path comprising a buffer (-) connected between the input () and one or more polyphase filters (-), wherein each of the plurality of filter paths (-) is configured to be individually selectable by providing an enable signal to a corresponding one of the buffers (-).

Growing community of inventors

Emieville, France

Sebastien Robert