Transceiver for transmitting and receiving stair-stepped sinusoidal waveforms
First Claim
1. A transceiver for transmitting and receiving digital signals between a plurality of nodes in a network interconnected by twisted pair lines, the transceiver comprising:
- a converting means for converting the digital signals to be transmitted to stair-stepped sinusoidal waveforms representative of the digital signals, said converting means comprising;
a plurality of current sources for supplying different amounts of current;
a plurality of switching means for routing the currents supplied by the current sources to the twisted pair lines;
a means for terminating the twisted pair lines, wherein a voltage across the twisted pair lines is proportional to the different amounts of current conducted through the twisted pair lines; and
,a means for controlling the plurality of switching means, wherein the voltage across the twisted pair lines appoximates the stair-stepped sinusoidal waveform;
a means for transmitting the stair-stepped sinusoidal waveforms on the twisted hair lines;
a means for receiving stair-stepped sinusoidal waveforms from the twisted pair lines;
a means for processing received stair-stepped sinusoidal waveforms to square waves representing digital signals;
a filtering means for filtering the received stair-stepped sinusoidal waveforms;
a means for discriminating a valid received signal over noise by comparing an unvalidated received signal from the twisted pair lines against a pre-determined threshold; and
.a means for detecting when the valid received signal crosses a reference voltage level.
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Accused Products
Abstract
A transceiver for transmitting and receiving digital data represented as stair-stepped sinusoidal waveforms over twisted pair lines interconnecting nodes of a network. The transmitter of the transceiver converts square waves into the stair stepped sinusoidal waveforms by utilizing a number of current sources for supplying differing amounts of current to a resistor coupled across the twisted pair lines. Shift registers control a set of switches which control the direction and the amount of current flowing through the resistor. Thereby, the output voltage across the resistor can be controlled to produce the stair-stepped sinusoidal waveform by clocking the digital signal to the shift registers. The receiver of the transceiver re-converts received stair-stepped sinusoidal waveforms back to their respective digital signals.
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Citations
22 Claims
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1. A transceiver for transmitting and receiving digital signals between a plurality of nodes in a network interconnected by twisted pair lines, the transceiver comprising:
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a converting means for converting the digital signals to be transmitted to stair-stepped sinusoidal waveforms representative of the digital signals, said converting means comprising; a plurality of current sources for supplying different amounts of current; a plurality of switching means for routing the currents supplied by the current sources to the twisted pair lines; a means for terminating the twisted pair lines, wherein a voltage across the twisted pair lines is proportional to the different amounts of current conducted through the twisted pair lines; and
,a means for controlling the plurality of switching means, wherein the voltage across the twisted pair lines appoximates the stair-stepped sinusoidal waveform; a means for transmitting the stair-stepped sinusoidal waveforms on the twisted hair lines; a means for receiving stair-stepped sinusoidal waveforms from the twisted pair lines; a means for processing received stair-stepped sinusoidal waveforms to square waves representing digital signals; a filtering means for filtering the received stair-stepped sinusoidal waveforms; a means for discriminating a valid received signal over noise by comparing an unvalidated received signal from the twisted pair lines against a pre-determined threshold; and
.a means for detecting when the valid received signal crosses a reference voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A network comprising:
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a plurality of intelligent cells for processing digital data; twisted pair lines interconnecting the plurality of intelligent cells; a transceiver coupled to each of the intelligent cells for transmitting data onto the twisted pair lines and receiving data from the twisted pair lines, wherein the data is represented by a sinusoidal waveform having a plurality of discrete potentials. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. In a network having a plurality of nodes interconnected by a transmission medium, a method of transmitting and receiving signals between the nodes as sinusoidal waveforms having discrete potentials, the method comprising the steps of:
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supplying a plurality of different amounts of current through a termination of the transmission medium; controlling the amount of current flowing through the termination to produce discrete potentials across the termination, wherein the potentials correspond to a sinusoidal waveform, wherein the sinusoidal waveform represents one bit of information; propagating the potentials from a first one of the nodes to a second one of the nodes over the medium; the second one of the nodes converting a received sinusoidal waveform having discrete potentials into the bit of information transmitted by the first one of the nodes. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification