Mobile wireless communications device with reduced interfering energy from the keyboard
US7243851B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2005 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Apr 4, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/03
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile wireless communications device includes a circuit board carried by a housing and having RF circuitry and a processor operative with the RF circuitry. A keyboard is carried by the housing and includes a keypad array circuit. A keypad connector is carried by the keypad and is operatively connected to the RF circuitry and processor. A plurality of Key_Out and Key_In connection lines connect the keypad connector and keypad array circuit. Filters carried by the keyboard are connected into each Key_Out and Key_In connection line for reducing RF energy picked up from either the antenna or external interference and interfering with normal processor operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.