Dyson Technology Limited

Creative Technology Corporation

Siew Ling Loke

Yam Fei Lian

Li Niu

A computer sound card includes a power supply noise isolation circuit for reducing ground plane noise generated during application of heavy electrical loads to the power supply, such as loads presented by computer GPUs. The power supply isolation circuit isolates the output ground from the ground presented from the power supply to the isolation circuit input. The isolation circuit in one embodiment includes switching circuitry and a transformer to reduce the power supply ripple noise that might otherwise be introduced by the power supply into an amplifier such as a microphone preamp. In some embodiments a differential amplifier stage is added to the output of the microphone preamp stage to further reduce noise, such as common mode noise.

Method to reduce noise in microphone circuits

Disclosed herein is a method of controlling a haircare appliance including a heater. The method includes measuring a temperature of output air of the haircare appliance to obtain a measured output air temperature. The method includes comparing the measured output air temperature to a desired output air temperature. The method includes determining a desired heater temperature based on the comparison of the measured output air temperature to the desired output air temperature. The method includes predicting a predicted heater temperature. The method includes comparing the predicted heater temperature to the desired heater temperature. The method includes outputting a control signal based on the comparison of the predicted heater temperature to the desired heater temperature.

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Singapore, Singapore

Siew Ling Loke