公开(公告)号：US20200076418A1

公开(公告)日：2020-03-05

申请号：US16117862

申请日：2018-08-30

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： David Corvino ,  Javier Alfaro ,  Carlos A. Garrafa

IPC: H03K17/16 ,  H03F3/187 ,  H04R3/00

Abstract: Systems and methods for an audio switching circuit. One system includes an audio switching circuit including a first P-channel transistor including a first source terminal, a first gate terminal, and a first drain, a second P-channel transistor including a second source terminal, a second gate terminal, and a second drain terminal, and a control circuit. The second drain terminal is coupled to the first drain terminal. The first P-channel transistor is configured to receive a first audio signal at the first drain terminal. The control circuit is configured to disconnect the first gate terminal from a ground reference, and in response to the presence of the first audio signal, cause a first voltage between the first gate terminal and the first source terminal to be approximately zero and prevent the first audio signal from passing through the first drain terminal.

公开(公告)号：US20200033932A1

公开(公告)日：2020-01-30

申请号：US16044271

申请日：2018-07-24

Applicant: Motorola Solutions, Inc.

Inventor： Daniel Grobe Sachs ,  Graeme Johnson ,  Stephen C. Glass ,  Peter J. Bartels ,  Javier Alfaro ,  Carlos Camps

IPC: G06F1/32 ,  G06F1/28 ,  H04W52/02

Abstract: A method and apparatus for mission critical standby of a portable communication device are disclosed. A portable communication device may include a primary processor for a first operating platform, a secondary processor for a second operating platform and communicatively coupled to the primary processor, and a power state manager that may have a first mode and a second mode. The power state manager may be configured to determine whether the primary processor is in a powered off state and sequence supply of power to the secondary processor. The first mode may allow the primary processor to monitor a power state of the secondary processor based on a determination that the primary processor is not in the powered off state and the second mode may enable the power state manager to monitor the power state based on a determination that the primary processor is in the powered off state.

公开(公告)号：US10468872B1

公开(公告)日：2019-11-05

申请号：US16289207

申请日：2019-02-28

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Peter J. Bartels ,  Javier Alfaro ,  Hugo Garcia ,  Kevin Alonso ,  Stephen C. Glass

IPC: H04B1/38 ,  H02H9/02 ,  H02H1/00 ,  H03F3/183 ,  H03F3/19 ,  H03F3/24

Abstract: 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.

公开(公告)号：US10015658B1

公开(公告)日：2018-07-03

申请号：US15599293

申请日：2017-05-18

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Javier Alfaro ,  Kurt S. Fienberg ,  Daniel Landron ,  Kevin D. Elliott ,  David Corvino ,  Hua Li

IPC: H04M3/00 ,  H04W4/90 ,  H04W4/22 ,  H04W4/10 ,  H04W24/04 ,  H04W52/02 ,  H04W36/00 ,  H04W40/02 ,  H04M1/725 ,  H04W40/36 ,  H04W88/06

CPC classification number: H04W4/90 ,  H04M1/72527 ,  H04M1/72536 ,  H04M1/72538 ,  H04W4/10 ,  H04W24/04 ,  H04W36/0022 ,  H04W40/02 ,  H04W40/36 ,  H04W52/0296 ,  H04W88/06 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/126 ,  Y02D70/1262 ,  Y02D70/26

Abstract: A portable communication system (100) maintains mission critical functionality. An accessory (120) and a handset (130) are tethered and interoperate such that the accessory operates as the primary controlling device and the handset operates as a secondary device. The accessory (120) contains a main applications processor (102) that handles non-mission critical functions. The accessory further contains a mission critical processor (104) for handling mission critical functions of transmit and receive audio as well as PTT and emergency. In response to a failure of the mission critical processor (104), the mission critical functions are maintained by handing over the mission critical functions to the non-controlling device in a manner transparent to the user. The handover is triggered in response to status changes of the mission critical processor or as a result of battery depletion. Audio paths are re-routed through backup paths (146b,148) negating reliance on processors of the accessory (120).