公开(公告)号：US10341839B2

公开(公告)日：2019-07-02

申请号：US15996837

申请日：2018-06-04

Applicant: MOTOROLA SOLUTIONS, INC.

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

IPC: H04M11/04 ,  H04W4/90 ,  H04M1/725 ,  H04W4/10 ,  H04W40/36 ,  H04W40/02 ,  H04W36/00 ,  H04W24/04 ,  H04W52/02 ,  H04W88/06

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).

公开(公告)号：US10659037B2

公开(公告)日：2020-05-19

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 ,  H04R3/00 ,  H03F3/187

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：US20190141508A1

公开(公告)日：2019-05-09

申请号：US15996837

申请日：2018-06-04

Applicant: MOTOROLA SOLUTIONS, INC.

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

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

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).

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：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).