Motorola Solutions, Inc.

Kevin Alonso

Peter J Bartels

Javier Alfaro

Stephen C Glass

Jeffrey Lee Cutcher

Hugo Garcia

David W Henry

Michael Hand

A battery operated portable communication device is provided with improved transmitter current limit stabilization via a current limit stabilization circuit operatively coupled to the battery and a DC-to-DC converter of the transmitter. The current limit stabilization circuit provides a variable stabilizing reference voltage which is directly proportional to the supply voltage. The current limit stabilization circuit generates a voltage limit output voltage that controls both the power to the transmitter () and limits current to the transmitter.

Apparatus and method for dynamically stabilizing current limiting in a portable communication device

A battery operated portable communication device provides converged functionality while avoiding resets to the device. Composite logic circuitry formed of at least one comparator and a logic interface controls current limiting to a primary load formed of high power land mobile radio (LMR) devices and programming to secondary loads formed of non-LMR peripherals. At least one current limit control signal is used to control current to the primary load under high current mode operations. Another control signal provides an interruption alert to a slave processor for controlled programming of the secondary loads during the high current operations of the primary load. Current to the primary load is restored while the secondary load is interrupted. Operation of secondary load processes is resumed when the primary load ceases high power operation.

Method and apparatus for rapidly and dynamically adjusting current limiting in a portable communication device

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Davie, FL, United States of America

Kevin Alonso