Mobile wireless communications device having improved RF immunity of audio transducers to electromagnetic interference (EMI)
April 4, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesEMI Filter connector having RF suppression characteristics Control signal initiator responsive to a hinge position Method and apparatus for a PCB and I/O integrated electromagnetic containment Headset for hands-free wireless telephone Modem having an electromagnetic shield for a controller Wireless radio modem with minimal inter-device RF interference Method and apparatus for automatically configuring a control program for a mobile radio communication device Apparatus for modulating/demodulating signals Electrostatic discharge protection in a portable communication device System for mitigating RF interference in a hearing aid InventorsAssigneeApplicationNo. 11098275 filed on 04/04/2005US Classes:455/550.1, Radiotelephone equipment detail455/73, TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER)333/182, Feedthrough type200/61.7, Hinge member actuated333/12, TRANSMISSION LINE INDUCTIVE OR RADIATION INTERFERENCE REDUCTION SYSTEMS379/430, Body supported (e.g., headgear)375/222, Modems (data sets)455/418, Programming control200/305, Electrical shield381/312, HEARING AIDS, ELECTRICAL361/680, Including keyboard support704/226, Noise455/234.1, Automatic725/75, Vehicle455/67.13, Noise, distortion, or unwanted signal detection (e.g., quality control, etc.)345/168, Including keyboard455/569.1, Hands-free or loudspeaking arrangement381/91, Having microphone174/50, BOXES AND HOUSINGS381/1, BINAURAL AND STEREOPHONIC370/241, DIAGNOSTIC TESTING (OTHER THAN SYNCHRONIZATION)345/173, Touch panel381/365, In electronic apparatus or vehicle607/60, Telemetry or communications circuits375/130, SPREAD SPECTRUM455/566, Having display375/368Synchronizer pattern recognizersExaminersPrimary: Mehrpour, NaghmehAttorney, Agent or FirmForeign Patent References
International ClassH04M 1/00AbstractA mobile wireless communications device includes a housing and circuit board carried by the housing and having radio frequency (RF) circuitry and a processor operative with each other. Audio circuitry is carried by the circuit board and an audio transducer assembly, such as a speaker, has electrical contacts that electrically engage the audio circuitry for carrying audio signals between the audio circuitry and audio transducer assembly. A filter is mounted at the audio transducer assembly and reduces radio frequency (RF) electromagnetic interference to the audio transducer assembly during device operation.Other References
Field of SearchOriginating in power supplyUsing plural separate signal paths In demodulator or low frequency (audio amplifier circuit) Internally generated noise or oscillations In demodulator or low frequency (e.g., audio frequency) TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) Transceiver controlling a separate transceiver or receiver Transmitter oscillator used as detector Interface attached device (e.g., interface with modem, facsimile, computer, etc.) Card control element Having particular application (e.g., avalanche victim assistance) of a transceiver Automatic Processor controlled Automatic gain control signal derived from information signal Responsive to plural inputs Automatic gain control to improve strong signal handling | |
