Knowles Electronics, Inc.

Tore Sejr Jørgensen

Fabrizio Conso

Allan Nielsen

The present disclosure relates in a first aspect to a method of detecting leakage current from a DC bias voltage circuit of an integrated circuit for a capacitive microelectro mechanical systems (MEMS) transducer. A test signal with a predetermined frequency and level is superimposed on a first DC bias voltage generated by the DC bias voltage circuit.

Leakage current detection from bias voltage supply of microphone assembly

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.

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Taastrup, Denmark

Tore Sejr Jørgensen