公开(公告)号：US11657846B1

公开(公告)日：2023-05-23

申请号：US17710608

申请日：2022-03-31

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics, Inc.

Inventor： Enrico Mammei ,  Paolo Sanna ,  Dennis Hogg ,  Edoardo Contini

IPC: G11B20/10

CPC classification number: G11B20/10027

Abstract: A method to determine a relative delay between a current-overshoot signal and a write data signal for a hard disk drive preamplifier, the method including using a memory element to strobe a test current-overshoot signal with a test data signal; counting a number of strobed transitions of the test current-overshoot signal; adjusting the delay based on the number of strobed transitions; setting a phase difference between the current-overshoot signal and the write data signal according to the delay; and using the memory element to strobe the current-overshoot signal with the write data signal.

公开(公告)号：US11720128B2

公开(公告)日：2023-08-08

申请号：US17362532

申请日：2021-06-29

Applicant: STMicroelectronics S.r.l.

Inventor： Enrico Mammei ,  Francesco Ravelli ,  Edoardo Contini ,  Paolo Pulici

IPC: G05F1/565 ,  G11B5/012 ,  G05F1/575

CPC classification number: G05F1/565 ,  G05F1/575 ,  G11B5/012

Abstract: In an embodiment, a linear voltage regulator includes: an output transistor having a first current path terminal configured to be coupled to a load, and a second current path terminal coupled to a first supply terminal, where the output transistor is configured to provide, at the first current path terminal, a regulated output voltage; a voltage source circuit configured to provide, in an open loop manner, a first voltage to a control terminal of the output transistor; and a feedback loop coupled between the first current path terminal of the output transistor and the control terminal of the output transistor, the feedback loop including a sense transistor having a first current path terminal coupled to the first current path terminal of the output transistor.

公开(公告)号：US20220413531A1

公开(公告)日：2022-12-29

申请号：US17362532

申请日：2021-06-29

Applicant: STMicroelectronics S.r.l.

Inventor： Enrico Mammei ,  Francesco Ravelli ,  Edoardo Contini ,  Paolo Pulici

IPC: G05F1/565 ,  G05F1/575 ,  G11B5/012

Abstract: In an embodiment, a linear voltage regulator includes: an output transistor having a first current path terminal configured to be coupled to a load, and a second current path terminal coupled to a first supply terminal, where the output transistor is configured to provide, at the first current path terminal, a regulated output voltage; a voltage source circuit configured to provide, in an open loop manner, a first voltage to a control terminal of the output transistor; and a feedback loop coupled between the first current path terminal of the output transistor and the control terminal of the output transistor, the feedback loop including a sense transistor having a first current path terminal coupled to the first current path terminal of the output transistor.