Motorola Solutions, Inc.

Geng Xiang Lee @ Titus Lee

Chen Kok Yeoh

Friedrich J Bollmann

Joo Yih See

An intrinsically safe audio power circuit includes redundant electronic fuses disposed between the power input of an audio power amplifier and the battery source of the portable two-way radio device. The electronic fuse circuits are connected in series with each other, and each electronic fuse circuit includes a series switch transistor that can shut off the flow of current between the battery and the audio power amplifier. Each electronic fuse circuit also includes a current sense portion, and when the current through the electronic fuse circuits reaches a current threshold, it will shut off its series switch transistor using an active bias circuit in order to ensure sufficiently rapid shut off.

Growing community of inventors

Pulau Pinang, Malaysia

Geng Xiang Lee @ Titus Lee