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Low-noise lossless feedback double-balanced active mixers
A lossless feedback double-balanced active mixer circuit with improved intermodulation (IM) and noise figure (NF) performance is described which includes a pair of ...
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Voice mail system
Wherefore, an object of the invention is to provide a voice mail system in which self voice data can be easily attached and returned by eliminating redundant voice data ...
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Method for automatically processing setting of portable telephone additional services and portable telephone fitted with automatic response function
It is an object of the invention to solve the above-mentioned problems by providing a method for automatically processing setting of portable telephone additional ...
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Method for performing an enhanced random access using information of forward common channels in a mobile communication system
Accordingly, the present invention is directed to an improved method for performing a random access in a mobile communication system that substantially obviates one or ...
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Pre-paid commodity system
The present invention combines all of the necessary ingredients for a complete pre-paid commodity or utility service system. Each transaction in the system is identified ...
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Public modular-telephone management system
We claim: 1. A public modular management system, comprising: a variable number of public modular telephones; validation and identification units of public modular ...
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Wireless telephone debit card system and method
According to the present invention, as embodied and broadly described herein, a wireless debit card system comprising at least one radio unit, at least one base station, ...
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Tariff management apparatus and method for communications terminals using smart cards
In light of the foregoing, it is an object of the present invention to provide improved systems and methods for controlling expenses incurred by a communications ...
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Process for forming electrical/mechanical connections
In a first aspect, the invention provides a method of making a connection to a surface, the method comprising: providing a mass of malleable material on the surface; ...
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Method of programming a telephone
The present invention provides a method and apparatus for automatically programming telephone numbers into a wireless telephone. The present invention also provides a ...
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