Mobile wireless communications device with reduced interfering energy from the keyboard
AssigneeResearch In Motion Limited
InventorsLizhong Zhu, Michael Corrigan, Perry Jarmuszewski
Life of this patent
Estimating the term…
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.
Claims20
A mobile wireless communications device comprising:
- a housing;
- a circuit board carried by the housing and including radio frequency (RE) circuitry carried by the circuit board and forming a transmitter and receiver, and a processor carried by the circuit board and operative with the RF circuitry;
- an antenna mounted within the housing and operative with the RF circuitry;
- a keyboard carried by the housing and having a keypad array circuit, a keypad connector operatively connected to said RF circuitry and processor, and a plurality of Key_Out and Key_In connection lines carried by the keyboard and connecting the keypad connector and keypad array circuit;
- and
- filters carried by the keyboard and connected into each Key_Out and Key_In connection line for reducing RF energy picked up from either the antenna or external interference.
A mobile wireless communications device comprising:
- a housing;
- a circuit board carried by the housing and including radio frequency (RF) circuitry carried by the circuit board and forming a transmitter and receiver, and a processor carried by the circuit board and operative with the RF circuitry;
- a keyboard connector mounted on the circuit board;
- a plurality of Key_Out and Key_In connection lines carried by the circuit board and connecting the processor and keyboard connector;
- an antenna mounted within the housing and operative with the RE circuitry;
- a keyboard carried by the housing and having a keypad array circuit, a keypad connector engaging the keyboard connector, and a plurality of Key_Out and Key_In connection lines carried by the keyboard and connecting the keypad connector and keypad array circuit;
- and
- a plurality of resistors carried by the keyboard and connected into each Key_Out and Key_In connection line for reducing RF energy picked up from either the antenna or external interference.
A method of making a mobile wireless communications device, which comprises:
- providing a housing, a circuit board carried by the housing and including radio frequency (RF) circuitry carried by the circuit board and forming a transmitter and receiver, and a processor carried by the circuit board and operative with the RF circuitry, an antenna mounted within the housing and operative with the RF circuitry, a keyboard carried by the housing and having a keypad array circuit, a keypad connector operatively connected to RF circuitry and processor, and a plurality of Key_Out and Key_In connection lines carried by the keyboard and connecting the keypad connector and keypad array circuit;
- and
- reducing RF energy picked up from either the antenna or external interference by connecting a filter into each Key_Out and Key_In connection line.
Dependencies are inferred from the claim text.