Resources Contact Us Home
Automatic-switching wireless communication device

Image Number 12 for United States Patent #7826805.

A base unit and a handset comprise a wireless part, a control part, and a transmission (151) and reception part (150), respectively. Communications are switched by either of the two ways: PTT switching and tone generation in the base unit, and tone detection in the handset or PTT switching in the base unit, and voice detection in the handset. It is preferable that the transmission (151) and reception (150) part of the handset includes a single transducer type headphone. It is also preferable that photo-coupler (41, 43) and a photo-switch (42) are provided at connection point of signal paths between the transmission (151) and reception part (150), the control part, and between the control part and the wireless part.

  Recently Added Patents
Optical switching device and communications system
Systems and methods for dynamically modifying subcriber service profile stored in home location register while roaming in wireless telecommunication networks
Circuit for compressing data and a processor employing same
Method for producing coated steel sheet
Base station device and wireless communication method
Method of manufacturing III-nitride crystal
Surface acoustic wave resonator for down-hole applications
  Randomly Featured Patents
Apparatus and method for tuning a golf shaft
Electric discharge machine
Reagent-less whole-blood glucose meter
Bicycle seat
Crackle stamp pad design for printing repeated designs on surfaces
Video display control
Steering of laser beams
Negative thermal expansion materials
Methodology for deriving executable low-level structural descriptions and valid physical implementations of circuits and systems from semantic specifications and descriptions thereof
Information technology process for prefabricated building panel assembly