Portable wireless terminal having separated vibration embodying circuit for alerting a user of an incoming call
US6469460B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/047
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless terminal including a custom integrated circuit for adjusting and applying the voltage of a particular pulse and a power supply for supplying power to operate an internal vibration embodying circuit, the terminal includes: a switching circuit unit for controlling the motor action in the vibration embodying circuit: a current amplification unit for supplying a great current necessary for the driving of the motor; a driving motor unit for performing vibration by driving the vibration embodying circuit; an overcurrent protecting unit for maintaining a stable voltage in the motor when overvoltage is applied to an input and protecting the motor by interrupting said driving motor unit; and a battery pack, connected externally to the power supply, for supplying charges to the power supply unit by mounting the vibration embodying circuit therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.