Praveen Kumar Palacharla,Kanthimathinathan T,Neeraj Kumar Rai
申请号：
US13663010
公开号：
US09044625B2
申请日:
2012.10.29
申请国别(地区):
US
年份:
2015
代理人:
摘要：
Embodiments relate generally to personal alert safety systems (PASS) as well as the use of piezoelectric sound generators which may be located within a PASS device operable to alert others when user is in danger. Some embodiments further relate to the use of a PASS device in an SCBA. Embodiments may also relate to the design of piezoelectric driver circuits operable to sound one or more piezoelectric sound generators, wherein the driver circuit design may be low cost and energy efficient.
