Motorola Solutions, Inc.

Friedrich J Bollmann

Melanie King

Chen Kok Yeoh

Clarence Coffee

Divya Ramamoorthy

David Weygandt

Kow Chee Chong

Macwien Krishnamurthi

Cheah Heng Tan

Weng Kong Hor

Muhamad Ridzuan Azizan

Kheng Shiang Teh

Joo Yih See

Sih Hau Tan

Peter William Hilding Svendsen

Seng Huan Chuah

Khai Jin Choo

Teik Seng Saw

Abdul Rashid Abdul Halim

Jeevan Kanesalingam

Geng Xiang Lee @ Titus Lee

Wireless communication device and methods for operating the same. One wireless communication device includes an electronic processor configured to operate the wireless communication device in a first security mode of a plurality of available security modes. The electronic processor is also configured to evaluate one or more environmental context parameters associated with the wireless communication device, determine, based on the environmental context parameters, whether communications of the wireless communication device are susceptible to a potential cyber-security threat, and, in response to determining the communications of the wireless communication device are susceptible to the potential cyber-security threat, transition the wireless communication device to a second security mode of the plurality of available security modes to determine whether the potential cyber-security threat is present, wherein at least one selected from a group consisting of the frequency scanning feature and the frequency hopping feature is enabled in the second security mode.

Dynamically enabling a security feature of a wireless communication device based on environmental context

A communication system and method are provided for authenticating a portable radio from a plurality of shared portable radios. The authentication controls access to user personal profiles and public safety service applications associated with a public safety agency. A firearm having a firearm user ID stored therein, communicates the firearm user ID over short range communications to the portable radio. The firearm user ID may be used for single factor authentication or combined with a PIN entry for multi-factor authentication.

Communication system and method for controlling access to portable radio public safety service applications

A battery module includes a first load terminal, a second load terminal, a first charger terminal, a charger enable terminal, and a battery having a first battery terminal coupled to the first load terminal and a second terminal coupled to the second load terminal. A first isolation device is coupled between the first load terminal and the first charger terminal and has an enable terminal coupled to the charger enable terminal. A first protection circuit includes a second isolation device coupled between the second battery terminal and the second load terminal and a first sensing circuit configured to enable the second isolation device responsive to detecting a failure of the first isolation device.

Battery protection circuit with isolation device failure detection

A method and circuit board arrangement for an intrinsically safe portable device includes two or more circuit boards having a frame structure that forms a contiguous boundary around a space between the circuit boards. In the space there are circuit components mounted on both circuit boards, and a connector that connect the two circuit boards. An encapsulant material fills the space bounded by the frame structure between the circuit boards to exclude airborne material from coming into contact with the encapsulated circuit components.

Method and apparatus for intrinsically safe circuit board arrangement for portable electronic devices

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.

Intrinsically safe audio power current circuit and device using same

An intrinsically safe audio circuit and intrinsically safe portable two-way radio device meet conventional audio output requirements and intrinsically safe design limitations by separating the speaker coil of the device's speaker into separate coils to limit the energy storage possible in any one of the coils. Each separate coil is driven by one of several different audio power amplifiers that each output a substantially identical signal, and each of which are current limited.

Intrinsically safe audio circuit for a portable two-way radio

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Birkenwerder, Germany

Friedrich J Bollmann