Patent ID: 7363063
Filing Date: 2008-04-22
Classification: H04B,H04M

Abstract:
1. A mobile wireless communications device comprising: a housing; a circuit board carried by the housing and including radio frequency (RF) circuitry 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 parallel Key_Out and Key_In connection lines formed as uninterrupted and planar signal traces on the circuit board and connecting the keyboard connector and processor; a keypad carried by the housing and operatively connected to the keyboard connector for communicating with the processor through the keyboard connector and Key_Out and Key_In connection lines; and a resistor connected serially within each connection line and forming an electromagnetic interference (EMI) filter array and each resistor having a value selected based on the parasitic inductance of the Key_Out and Key_In lines to provide a desired RC, RL or RLC filter characteristic for limiting degradation in receiver sensitivity.