Motorola Corporation

Motorola Solutions, Inc.

Andres I Lacambra

Javier Alfaro

James S Mitrosky

Carlos Camps

Peter J Bartels

A portable communication device is provided with a power arbitration module formed with hardware logic configured to detect attachment of a battery and determine whether the battery is one of: an intrinsically safe (IS) battery or a standard, non-intrinsically safe (non-IS) battery. The power arbitration module enables a converged platform mode of operation in response to determining that the battery is a standard, non-intrinsically safe battery. The power arbitration module enables a land mobile radio (LMR) mode of operation in response to determining that the battery is an intrinsically safe battery. The determination of the battery type and enablement of operating mode is handled by hardware logic of the power arbitration module without use of a software protocol.

Apparatus and method for intrinsically safe operation of a portable communication device

A method for determining the switching frequency of a DC-to-DC power supply for a portable radio transceiver () includes determining a first group of switching frequencies () and then determining the switching harmonics based on that group of switching frequencies (). These switching harmonics are then compared to a group of desired radio channels () where it is then determined if the switching frequencies interfere with the group of desired radio channels (). Based on these results, a second group of switching frequencies is selected if the first set of switching frequencies provides an undesired level of interference ().

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Weston, FL, United States of America

Andres I Lacambra