Stmicroelectronics S.r.l.

Andrea Pallotta

Andrea Mazzanti

Mahmoud Mahdipour Pirbazari

Ubaldo Mastromatteo

Pietro Montanini

Francesco Martini

Francesco Svelto

Luca Larcher

Lorenzo Iotti

Alessandro Franceschin

A embodiment method, for linearizing a transmission signal resulting from a quadrature amplitude modulation of an analog baseband signal and a radiofrequency amplification, comprises a demodulation of a feedback signal taken from the transmission signal, a comparison between the demodulated feedback signal and the baseband signal, a digital calculation of a predistortion control signal based on the comparison, and an analog predistortion of the analog baseband signal controlled by the predistortion control signal.

Apparatus and method for linearizing a transmission signal

A voltage controlled oscillator includes a series resonant circuit having a resonance frequency and an active voltage driving device coupled to the series resonant circuit. The active voltage driving device provides a driving voltage and has an output negative resistance in an operative voltage range at the resonance frequency. The active voltage driving device includes a cross-coupled differential pair having voltage supply terminals providing the driving voltage. The series resonant circuit is coupled between the voltage supply terminals of the cross-coupled differential pair.

Voltage controlled oscillator with series resonant circuit

In an embodiment, a circuit for tripling frequency is configured to receive an input voltage (V) having a sinusoidal shape and a base frequency. The circuit has a first and a second transistor pair that are cross-coupled, and a trans-characteristics f(V) approximating a polynomial nominal trans-characteristic given by where A represents an amplitude of the input voltage and gis a transconductance of transistors of the first and second transistor pairs.

Electronic circuit for tripling frequency

The present disclosure relates to a voltage controlled oscillator comprising a plurality of oscillator cores magnetically coupled in series.

Device and method for voltage controlled oscillator comprising distributed active transformer cores

A photovoltaic power generation plant includes a plurality of photovoltaic generators cooperative in producing photovoltaic power. Coupled with the photovoltaic generators in the plurality of photovoltaic generators are respective sensor devices, the sensor devices including sensor circuits of the individual current-to-voltage characteristics of the photovoltaic generators. The sensor circuits in the sensor devices can be activated to sense the individual current-to-voltage characteristics of the photovoltaic generators, with the individual current-to-voltage characteristic being indicative of the functionality of each photovoltaic generator.

Method of operating photovoltaic generators, corresponding circuit, device and system

A distributed active transformer includes an input transformer set and an output transformer set. Active stages are coupled between a transformer in the input transformer set and a transformer in the output transformer set. The input and output transformer sets are each configured as a slab transformer. The input slab transformer includes a single primary slab and many secondary slabs. The output slab transformer includes many primary slabs and a single secondary slab.

Active transformer, corresponding apparatus and method

A push-pull amplifier includes a pair of active devices driving the primary side of a double distributed active transformer (DDAT). The primary side of the DDAT includes a cascaded arrangement of primary windings of a first set of transformers with the active devices coupled ends of cascaded arrangement of primary windings. The secondary side of the DDAT includes a cascaded arrangement of secondary windings of a second set of transformers coupled to a load. Secondary windings of the first set of transformers drive inputs of respective active stages. Outputs of the active stages drive respective primary windings of the second set of transformers.

Push-pull amplifier, corresponding apparatus and method

An oscillator has an oscillator output emitting an oscillating signal. The oscillator includes oscillator cores which each have a same circuit topology. A set of configuration switches couple a selected number of oscillator cores in parallel to generate the oscillating signal. The oscillator cores are arranged with a symmetry around a central axis. The planar inductors of the oscillator cores are arranged in a petal-like pattern with the planar inductors forming the petals of the petal-like pattern. The selected coupling of the oscillator cores in made in response to a selected phase noise threshold of a modulation device which receives the oscillating signal.

Oscillator circuit, corresponding apparatus and method

A power amplifier formed by a plurality of pairs of transistors, each pair including a first transistor and a second transistor having each a respective input terminal and a respective output terminal. The output terminals of the first and second transistors of each pair are connected to an output distributed active transformer connected to a differential output of the power amplifier. The input terminals of the first and second transistors of each pair are connected to an input distributed active transformer connected to an input of the power amplifier.

Distributed active transformer amplifier with differential power combiner

A packaging structure for optoelectronic components is formed by a first body, of semiconductor material, and a second body, of semiconductor material, fixed to a first face of said first body. A through window is formed in the second body and exposes a portion of the first face of the first body, whereon at least one optoelectronic component is fixed. Through connection regions extend through the first body and are in electrical contact with the optoelectronic component. The through connection regions are insulated from the rest of the first body via through insulation regions. Contact regions are arranged on the bottom face of the first body and are connected to said optoelectronic component via the through connection regions.

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Rho, Italy

Andrea Pallotta