公开(公告)号：US20200266781A1

公开(公告)日：2020-08-20

申请号：US16793144

申请日：2020-02-18

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro FINOCCHIARO ,  Giuseppe PAPOTTO ,  Egidio RAGONESE ,  Giuseppe PALMISANO

IPC: H03F3/45 ,  H03F1/34 ,  H04B1/40 ,  B60R11/02 ,  B60R11/04 ,  B60R16/023

Abstract: A cascade of amplifier stages has a differential input and a differential output. The cascade of amplifier stages includes at least one differential amplifier circuit including first and second transistors, at least one of the first and second transistors having a control terminal and a body terminal. A mismatch between the first and second transistors generates an input offset. A feedback network couples the differential output to the body terminal in order to cancel the input offset. The feedback network includes a low-pass filter and a differential amplifier stage.

公开(公告)号：US20200161980A1

公开(公告)日：2020-05-21

申请号：US16748328

申请日：2020-01-21

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro PARISI ,  Nunzio GRECO ,  Nunzio SPINA ,  Egidio RAGONESE ,  Giuseppe PALMISANO

IPC: H02M3/335 ,  H02M3/337 ,  H02M3/338 ,  H03B5/12 ,  H01F27/28 ,  H01F19/08 ,  H04L27/08 ,  H02M1/08

Abstract: A DC-DC converter includes a transformer having primary and secondary windings, a power oscillator applying an oscillating signal to the primary winding to transmit a power signal to the secondary winding, a rectifier obtaining an output DC voltage by rectifying the power signal at the secondary winding, and comparison circuitry generating an error signal representing a difference between the output DC voltage and a reference voltage value. A transmitter connected to the secondary winding performs an amplitude modulation of the power signal at the secondary winding to transmit an amplitude modulated power signal to the primary winding, the amplitude modulation based upon the error signal and modulating a stream of data to the primary winding. A receiver coupled to the primary winding demodulates the amplitude modulated power signal to recover the error signal and the stream of data. An amplitude of the oscillating signal is controlled by the error signal.

公开(公告)号：US20190305775A1

公开(公告)日：2019-10-03

申请号：US16371919

申请日：2019-04-01

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro PARISI ,  Nunzio GRECO ,  Nunzio SPINA ,  Egidio RAGONESE ,  Giuseppe PALMISANO

IPC: H03K17/722 ,  H03B5/06

Abstract: An oscillator is coupled to a first side of a galvanic barrier for supplying thereto an electric supply signal. The oscillator is configured to be alternatively turned on and off as a function of a PWM drive signal applied thereto. A receiver circuit coupled to the galvanic barrier receives therefrom a PWM power control signal. A signal reconstruction circuit coupled between the receiver circuit block and the oscillator provides to the oscillator a PWM drive signal reconstructed from the PWM power control signal. The signal reconstruction circuit includes a PLL circuit coupled to the receiver circuit block and configured to lock to the PWM control signal from the receiver circuit block. A PLL loop within the PLL circuit is sensitive to the PWM drive signal applied to the oscillator. The PLL loop is configured to be opened as a result of the power supply oscillator being turned off.

公开(公告)号：US20220329207A1

公开(公告)日：2022-10-13

申请号：US17704919

申请日：2022-03-25

Applicant: STMicroelectronics S.r.l.

Inventor： Nunzio SPINA ,  Egidio RAGONESE ,  Giuseppe PALMISANO

IPC: H03F1/02 ,  H03F3/19 ,  H04B1/40

Abstract: A rectifier stage includes a differential input transistor pair coupled between a reference voltage node and an intermediate node, and a load circuit coupled between the intermediate node and a supply voltage node. The differential input transistor pair receives a radio-frequency amplitude modulated signal. A rectified signal indicative of an envelope of the radio-frequency amplitude modulated signal is produced at the intermediate node. An amplifier stage coupled to the intermediate node produces an amplified rectified signal at an output node that is indicative of the envelope of the radio-frequency amplitude modulated signal. The rectifier stage includes a resistive element coupled between the intermediate node and the supply voltage node in parallel to the load circuit.

公开(公告)号：US20200278420A1

公开(公告)日：2020-09-03

申请号：US16795977

申请日：2020-02-20

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe PAPOTTO ,  Egidio RAGONESE ,  Claudio NOCERA ,  Alessandro FINOCCHIARO ,  Giuseppe PALMISANO

IPC: G01S7/03 ,  H03F3/19 ,  H03F1/56 ,  H03D7/14

Abstract: An input receives a radio frequency (RF) signal having an interfering component superimposed thereon. The RF signal is mixed with a local oscillator (LO) signal and down-converted to an intermediate frequency (IF) to generate a mixed signal which includes a frequency down-converted interfering component. The mixed signal is amplified by an amplifier to generate an output signal. A feedback loop processes the output signal to generate a correction signal for cancelling the frequency down-converted interfering component at the input of the amplifier. The feedback loop includes a low-pass filter and a amplification circuit which outputs the correction signal.

公开(公告)号：US20210376735A1

公开(公告)日：2021-12-02

申请号：US17404382

申请日：2021-08-17

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro PARISI ,  Nunzio GRECO ,  Nunzio SPINA ,  Egidio RAGONESE ,  Giuseppe PALMISANO

IPC: H02M3/335 ,  H02M1/08 ,  H04L27/08 ,  H01F19/08 ,  H01F27/28 ,  H03B5/12 ,  H02M3/338 ,  H02M3/337

Abstract: A DC-DC converter includes: an transformer having a primary winding and a secondary winding magnetically coupled to the primary winding; a power oscillator applying an oscillating signal to the primary to transmit a power signal to the secondary winding; a rectifier connected to the secondary winding of the transformer to obtain an output DC voltage by rectification of the power signal; comparison circuitry to generate an error signal representing a difference between the output DC voltage and a reference voltage; a transmitter connected to the secondary winding of the transformer to apply an amplitude modulation to the power signal at the secondary winding of the transformer in response to the error signal to thereby produce an amplitude modulated signal at the primary winding; and a receiver and control circuit connected to the primary winding to control an amplitude of the oscillating signal as a function of the amplitude modulated signal.