公开(公告)号：US11604267B2

公开(公告)日：2023-03-14

申请号：US17395016

申请日：2021-08-05

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro Parisi ,  Andrea Cavarra ,  Alessandro Finocchiaro ,  Giuseppe Papotto ,  Giuseppe Palmisano

IPC: G01S13/58 ,  G01S13/931 ,  H03B5/12 ,  H03L7/193 ,  H03L7/10 ,  G01S7/40 ,  H03L7/099

Abstract: An oscillator includes a tunable resonant circuit having an inductance and a variable capacitance coupled between first and second nodes, and a set of capacitances selectively coupleable between the first and second nodes. An input control node receiving an input control signal is coupled to the variable capacitance and set of capacitances. The tunable resonant circuit is tunable based on the input control signal. A biasing circuit biases the tunable resonant circuit to generate a variable-frequency output signal between the first and second nodes. A voltage divider generates a set of different voltage thresholds, and a set of comparator circuits with hysteresis compares the input control signal to the set of different voltage thresholds to generate a set of control signals. The capacitances in the set of capacitances are selectively coupleable between the first and second nodes as a function of control signals in the set of control signals.

公开(公告)号：US11128221B2

公开(公告)日：2021-09-21

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

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：US20180198372A1

公开(公告)日：2018-07-12

申请号：US15914257

申请日：2018-03-07

Applicant: STMicroelectronics S.r.l.

Inventor： Egidio Ragonese ,  Nunzio Spina ,  Pierpaolo Lombardo ,  Nunzio Greco ,  Alessandro Parisi ,  Giuseppe Palmisano

IPC: H02M3/335

CPC classification number: H02M3/33553 ,  H01L2224/48137 ,  H02M3/33523 ,  H02M3/33584 ,  H02M3/33592 ,  H02M2001/0012 ,  Y02B70/1475

Abstract: A galvanic isolation is provided between a first circuit and a second circuit. A first galvanically isolated link is configured to transfer power from a first circuit to a second circuit across the galvanic isolation. A second galvanically isolated link is configured to feed back an error signal from the second circuit to the first circuit across the galvanic isolation for use in regulating the power transfer and further configured to support bidirectional data communication between the first and second circuits across the galvanic isolation.

公开(公告)号：US20180062678A1

公开(公告)日：2018-03-01

申请号：US15468306

申请日：2017-03-24

Applicant: STMicroelectronics S.r.l.

Inventor： Egidio Ragonese ,  Nunzio Spina ,  Alessandro Parisi ,  Pierpaolo Lombardo ,  Nunzio Greco ,  Giuseppe Palmisano

IPC: H04B1/10 ,  H01F19/04

CPC classification number: H04B1/10 ,  H01F19/04 ,  H01F2019/085 ,  H03F3/45183 ,  H03F3/45632 ,  H03F2203/45084 ,  H03F2203/45621 ,  H03F2203/45642 ,  H03F2203/45704 ,  H04L25/02 ,  H04L25/0266 ,  H04L25/0272

Abstract: A galvanic isolation circuit is formed by a differential transformer having primary and secondary windings for transmission of signals over a carrier between the primary and the secondary windings of the transformer. A galvanic isolation oxide layer is provide between the primary and secondary windings. Each winding includes include a center tap providing a low-impedance paths for dc and low frequency components of common-mode currents through the differential transformer. A pass-band stage is coupled to the secondary winding of the transformer and configured to permit propagation of signals over said carrier through the pass-band amplifier stage while providing for a rejection of common-mode noise.

公开(公告)号：US20170358993A1

公开(公告)日：2017-12-14

申请号：US15178822

申请日：2016-06-10

Applicant: STMicroelectronics S.r.l.

Inventor： Egidio Ragonese ,  Nunzio Spina ,  Pierpaolo Lombardo ,  Nunzio Greco ,  Alessandro Parisi ,  Giuseppe Palmisano

IPC: H02M3/335

CPC classification number: H02M3/33553 ,  H01L2224/48137 ,  H02M3/33523 ,  H02M3/33584 ,  H02M2001/0012

Abstract: A galvanic isolation is provided between a first circuit and a second circuit. A first galvanically isolated link is configured to transfer power from a first circuit to a second circuit across the galvanic isolation. A second galvanically isolated link is configured to feed back an error signal from the second circuit to the first circuit across the galvanic isolation for use in regulating the power transfer and further configured to support bidirectional data communication between the first and second circuits across the galvanic isolation.