Are you tired of slow modem connections? Cellonics Incorporated has developed new technology that may end this and other communications problems forever. The new modulation and demodulation technology is called Cellonics. In general, this technology will allow for modem speeds that are 1,000 times faster than our present modems. The development is based on the way biological cells communicate with each other and nonlinear dynamical systems (NDS). Major telcos, which are telecommunications companies, will benefit from the incredible speed, simplicity, and robustness of this new technology, as well as individual users.
Digital Subscriber Lines (DSL) are used to deliver high-rate digital data over existing ordinary phone-lines. A new modulation technology called Discrete Multitone (DMT) allows the transmission of high speed data. DSL facilitates the simultaneous use of normal telephone services, ISDN, and high speed data transmission, e.g., video. DMT-based DSL can be seen as the transition from existing copper-lines to the future fiber-cables. This makes DSL economically interesting for the local telephone companies. They can offer customers high speed data services even before switching to fiber-optics.
Cellonics Inc. has developed and patented families of Cellonics circuits that are useful for various applications. One of these Cellonicsâ„¢ circuits is an extremely simple circuit that exhibits the â€œS curveâ€ transfer characteristic. Fig 3a shows one of the possible circuit realizations. The circuit contains a negative impedance converter. Itâ€™s I-V transfer characteristic is shown in Fig 3b.The transfer characteristic consists of three different regions.
The two lines at the top and bottom have positive slope, 1/RF and they represent the regions in which the Op-Amp is operating in the saturated (nonlinear) mode. In Fig 3b, the middle segment has a negative slope (negative resistance) and represents the region in which the Op-Amp is operating linearly. It is this negative resistance region that allows the Op-Amp to oscillate and produce pulses bounded by the positive and negative saturation voltages.
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