Invention Grant
- Patent Title: Intrinsically safe audio circuit for a portable two-way radio
- Patent Title (中): 用于便携式双向无线电的本质安全音频电路
-
Application No.: US14037900Application Date: 2013-09-26
-
Publication No.: US09369800B2Publication Date: 2016-06-14
- Inventor: Cheah Heng Tan , Friedrich J Bollmann , Teik Seng Saw , Peter William Hilding Svendsen , Kheng Shiang Teh
- Applicant: MOTOROLA SOLUTIONS, INC
- Applicant Address: US IL Schaumburg
- Assignee: MOTOROLA SOLUTIONS, INC.
- Current Assignee: MOTOROLA SOLUTIONS, INC.
- Current Assignee Address: US IL Schaumburg
- Agent Scott M. Garrett; Barbara R. Doutre
- Main IPC: G03G11/00
- IPC: G03G11/00 ; H04R3/00 ; H04R9/02
Abstract:
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.
Public/Granted literature
- US20150086026A1 INTRINSICALLY SAFE AUDIO CIRCUIT FOR A PORTABLE TWO-WAY RADIO Public/Granted day:2015-03-26
Information query
