公开(公告)号：US20190245435A1

公开(公告)日：2019-08-08

申请号：US16269195

申请日：2019-02-06

申请人： STMicroelectronics S.r.l.

发明人： Edoardo Botti ,  Arunkumar Salimath ,  Edoardo Bonizzoni ,  Franco Maloberti ,  Paolo Cacciagrano ,  Davide Luigi Brambilla

IPC分类号： H02M3/07 ,  H03F3/217 ,  H04R3/00 ,  B60R16/033

摘要： A converter includes a first switch coupled between a first input terminal and a first terminal of an inductor, and a second switch coupled between a second terminal of the inductor and a second input terminal. A third switch is coupled between the second terminal of the inductor and a first output terminal, and a fourth switch is coupled between the first terminal of the inductor and a second output terminal. A capacitor is coupled between the first and second output terminals. A control circuit monitors a regulated voltage between the first and second output terminals. During a charge phase, the first and second switches are closed to charge the inductor. During a discharge phase, the third and fourth switches are closed to charge the capacitor and increase the regulated voltage.

公开(公告)号：US11804814B1

公开(公告)日：2023-10-31

申请号：US17719613

申请日：2022-04-13

申请人： STMicroelectronics S.r.l.

发明人： Francesco Stilgenbauer ,  Paolo Cacciagrano ,  Giovanni Gonano

IPC分类号： H03G3/34 ,  H04R3/00

CPC分类号： H03G3/344 ,  H04R3/00 ,  H03G2201/103 ,  H04R2430/01

摘要： A digital audio playback circuit includes a noise shaping circuit configured to receive an input digital audio signal, and a digital to analog converter (DAC) configured to convert the input digital audio signal to a pre-amplified output analog audio signal according to a gain ramp defined by a gain control signal. A muting circuit is configured to compare input digital audio signal to a threshold and assert a mute control signal when the input digital audio signal is below the threshold. An analog gain control ramp circuit is configured to generate the gain control signal in response to the mute control signal to cause the gain ramp to ramp down. An amplifier is configured to amplify the pre-amplified output analog audio signal for playback by an audio playback device.

公开(公告)号：US10804796B2

公开(公告)日：2020-10-13

申请号：US16269195

申请日：2019-02-06

申请人： STMicroelectronics S.r.l.

发明人： Edoardo Botti ,  Arunkumar Salimath ,  Edoardo Bonizzoni ,  Franco Maloberti ,  Paolo Cacciagrano ,  Davide Luigi Brambilla

IPC分类号： H02M3/07 ,  H03F3/217 ,  B60R16/033 ,  H04R3/00 ,  H02M3/00 ,  H02M3/158 ,  H03F1/02 ,  H03F3/187 ,  H02M1/00

摘要： A converter includes a first switch coupled between a first input terminal and a first terminal of an inductor, and a second switch coupled between a second terminal of the inductor and a second input terminal. A third switch is coupled between the second terminal of the inductor and a first output terminal, and a fourth switch is coupled between the first terminal of the inductor and a second output terminal. A capacitor is coupled between the first and second output terminals. A control circuit monitors a regulated voltage between the first and second output terminals. During a charge phase, the first and second switches are closed to charge the inductor. During a discharge phase, the third and fourth switches are closed to charge the capacitor and increase the regulated voltage.