公开(公告)号：US11523198B2

公开(公告)日：2022-12-06

申请号：US16858662

申请日：2020-04-26

申请人： Knowles Electronics, LLC

发明人： Fabrizio Conso ,  Tore Sejr Jørgensen

IPC分类号： H04R1/04 ,  H03H1/00 ,  H02H7/20 ,  H03H7/06 ,  H03H1/02

摘要： The present disclosure relates to devices and methods for programming one-time programmable fuses of microphone assemblies. One microphone assembly includes a housing, a transducer, a filter circuit, and an integrated circuit. The integrated circuit has a fuse block having a one-time programmable (OTP) fuse configurable in a programming mode of operation during which a voltage applied to the supply voltage contact is increased relative to a voltage applied to a supply voltage contact in a normal mode of operation. The microphone assembly further includes a protection circuit configured to regulate a voltage at the voltage input terminal of the integrated circuit during the programming mode of operation based on a comparison of a voltage at the voltage input terminal with a reference voltage. The voltage on the voltage input terminal of the integrated circuit tracks the reference voltage during the programming mode of operation.

公开(公告)号：US20200344538A1

公开(公告)日：2020-10-29

申请号：US16858662

申请日：2020-04-26

申请人： Knowles Electronics, LLC

发明人： Fabrizio Conso ,  Tore Sejr Jørgensen

IPC分类号： H04R1/04 ,  H03H1/00 ,  H03H1/02 ,  H03H7/06 ,  H02H7/20

摘要： The present disclosure relates to devices and methods for programming one-time programmable fuses of microphone assemblies. One microphone assembly includes a housing, a transducer, a filter circuit, and an integrated circuit. The integrated circuit has a fuse block having a one-time programmable (OTP) fuse configurable in a programming mode of operation during which a voltage applied to the supply voltage contact is increased relative to a voltage applied to a supply voltage contact in a normal mode of operation. The microphone assembly further includes a protection circuit configured to regulate a voltage at the voltage input terminal of the integrated circuit during the programming mode of operation based on a comparison of a voltage at the voltage input terminal with a reference voltage. The voltage on the voltage input terminal of the integrated circuit tracks the reference voltage during the programming mode of operation.